ABCMdb

ABCC6 p.Arg1339Cys

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Publications

PMID: 16006996 [PubMed] Conseil G et al: "Polymorphisms of MRP1 (ABCC1) and related ATP-dependent drug transporters."

No. Sentence Comment

56 In the kidney, glomeruli and distal collecting tubules express MRP1, and, in the brain, MRP1 appears to form part of the drug permeability barrier Fig. 1 CF (CFTR/ABCC7) Q1291R E1228G Q1238R G1244E/V G1247R G1249R S1251N S1255P/L W1282G/R/C R1283K/M N1303K Y1307C E1321Q K1351E Q1352H R1268Q V1298F T1301I G1302R A1303P R1314W/Q G1321S R1339C Q1347H I1350L G1354R D1361N Q1382R A1450T R1347E R1351P V1359G/M S1368A G1377R G1382S R1392H R1419C R1435Q G1477R G1479R R1492W E1505K DJS (MRP2/ABCC2) NBD1 NBD2 COOH MEMBRANE MSD MSD MSD 12131415161710116 7 8 91 23 4 5TM H2 N Extracellular Intracellular PXE (ABCC6) PHHI (SUR1/ABCC8) Two-dimensional structure of MRP-related proteins. Login to comment

PMID: 11536079 [PubMed] Le Saux O et al: "A spectrum of ABCC6 mutations is responsible for pseudoxanthoma elasticum."

No. Sentence Comment

85 PXE Mutations The most-prevalent mutations detected in the ABCC6 gene were missense substitutions (21 [58.3%] mutations, Table 1 ABCC6 Mutations in a Cohort of Patients with PXE CHANGE IN STATUS a ORIGIN(S)b EXON(S)c REFERENCE(S)Amino Acid Nucleotide … 179-195del ht Belgium 2 Present study … 938-939insT ch, ht SA, UK 8 Present study N411K 1233TrG ht US 10 Present study A455P 1363GrC Nd Nd 11 Uitto et al. (2001) R518Q 1553GrA ch, ht Belgium 12 Present study, Uitto et al. (2001) F568S 1703TrC ch US 13 Present study … ABCC6del15 hm SA 15 Present study … 1944del22 ht Holland 16 Bergen et al. (2000) … 1995delG ht Germany 16 Present study L673P 2018TrC ch SA 16 Present study R765Q 2294GrA ht Germany 18 Present study Y768X 2304CrA ch, ht SA 18 Present study … 2322delC ht US 18 Present study … 2542delG Nd Nd 19 Uitto et al. (2001) … IVS21ϩ1GrT ch US, Germany i-21 Present study, Uitto et al. (2001) R1030X 3088CrT ht SA, UK 23 Present study R1114P 3341GrC hm UK 24 Present study S1121W 3362CrG ch Germany 24 Present study R1138W 3412CrT hm Nd 24 Ringpfeil et al. (2000) R1138P 3413GrC ch Germany 24 Present study R1138Q 3413GrA ch UK, US 24 Present study, Ringpfeil et al. (2000) R1141X 3421CrT All All 24 Present study and othersd R1164X 3490CrT ch Germany, UK 24 Ringpfeil et al. (2001) G1203D 3608GrA ch Germany 25 Present study … IVS26-1GrA ch Belgium i-26 Present study, Ringpfeil et al. (2000, 2001) Q1237X 3709CrT ch Belgium 26 Present study … 3775delT ht, hm SA, US, Holland 27 Present study, Bergen et al. (2000) V1298F 3892GrT ht US 28 Present study T1301I 3902CrT ch Belgium 28 Present study G1302R 3904GrA hm US 28 Present study A1303P 3907GrC ch Belgium 28 Present study R1314W 3940CrT hm US 28 Present study R1314Q 3941GrA ch Germany 28 Present study G1321S 3961GrA ht US 28 Present study R1339C 4015CrT All SA, US 28 Present study, Struk et al. (2000) Q1347H 4041GrC hm US 28 Present study D1361N 4081GrA ch Germany 29 Present study … 4104delC ch Belgium 29 Present study R1398X 4192CrT ch Belgium 29 Present study … ABCC6del23-29 ch US 23-29 Present study, Ringpfeil et al. (2001) … 4220insAGAA ht Holland 30 Bergen et al. (2000) I1424T 4271TrC ht US 30 Present study … ABCC6del ht Holland all Bergen et al. (2000) a Nd p not determined; hm p homozygote; ht p heterozygote; ch p compound heterozygote. Login to comment
94 Although most of the mutations reported here appear to be unique, a few disease-causing variants have been found to occur frequently in apparently unrelated individuals; R1141X was found at Table 2 Frequencies of Mutant Alleles Found in a Cohort of 101 Unrelated Patients with PXE MUTATION a OVERALL EUROPE UNITED STATES No. of Alleles Frequency (%) No. of Alleles Frequency (%) No. of Alleles Frequency (%) R1141X 38 18.8 33 28.4 3 4.1 ABCC6del23-29 26 12.9 5 4.3 21 28.4 IVS21ϩ1GrT 7 3.5 4 3.4 3 4.1 G1302R 4 2.0 0 .0 4 5.4 A1303P 4 2.0 3 2.6 1 1.4 R1314W 3 1.5 0 .0 3 4.1 R518Q* 3 1.5 1 .9 1 1.4 3775delT* 3 1.5 2 1.7 0 .0 R1138Q 2 1.0 1 .9 1 1.4 V1298F 2 1.0 0 .0 2 2.7 R1339C 2 1.0 0 .0 2 2.7 Q1347H 2 1.0 0 .0 2 2.7 4104delC* 2 1.0 1 .9 0 .0 179-195del 1 .5 1 .9 0 .0 938-939insT* 1 .5 0 .0 0 .0 N411K 1 .5 0 .0 1 1.4 F568S 1 .5 0 .0 1 1.4 1995delG 1 .5 1 .9 0 .0 R765Q 1 .5 1 .9 0 .0 2322delC 1 .5 0 .0 1 1.4 R1030X* 1 .5 0 .0 0 .0 R1114P 1 .5 1 .9 0 .0 S1121W 1 .5 1 .9 0 .0 R1138P 1 .5 1 .9 0 .0 G1203D 1 .5 1 .9 0 .0 IVS26-1GrA 1 .5 1 .9 0 .0 Q1237X 1 .5 1 .9 0 .0 W1241C 1 .5 1 .9 0 .0 T1301I 1 .5 1 .9 0 .0 R1314Q 1 .5 1 .9 0 .0 D1361N 1 .5 1 .9 0 .0 R1398X 1 .5 1 .9 0 .0 G1321S 1 .5 0 .0 1 1.4 I1424T 1 .5 0 .0 1 1.4 ? Login to comment
215 Five South African patients carried homozygous R1339C alleles. Login to comment

PMID: 12384774 [PubMed] Le Saux O et al: "Evidence for a founder effect for pseudoxanthoma elasticum in the Afrikaner population of South Africa."

No. Sentence Comment

51 One missense allele, R1339C, represented more than half (53%) the total number of Afrikaner mutant alleles (Table 2). Login to comment
59 The remaining R1141X mutations, characterized in Family 224 (Afrikaner) and Family 212 (British ancestry) were found in different haplotypes indicating that 333 Table 1 ABCC6 mutations identified in a cohort of South African PXE patients of Afrikaner and other ancestries (nt nucleotide, aa amino acid, ni not identified, UK United Kingdom, Black black South Africans) Family Allele 1 Allele 2 Ancestry nt change aa change Exon Haplotype nt change aa change Exon Haplotype 201 4015C→T R1339C 28 I 4015C→T R1339C 28 I Afrikaner 203 4015C→T R1339C 28 I 3413G→A R1138Q 24 III Afrikaner 205 3413G→A R1138Q 24 III 2304C→A Y768X 18 II Afrikaner 206 4015C→T R1339C 28 I 3421C→T R1141X 24 Other Afrikaner 208 4015C→T R1339C 28 I 4015C→T R1339C 28 I Afrikaner 209 4015C→T R1339C 28 I 2018T→C L673P 16 Other Afrikaner 211 4015C→T R1339C 28 I 3413G→A R1138Q 24 III Afrikaner 222 4015C→T R1339C 28 I 4015C→T R1339C 28 I Afrikaner 223 4015C→T R1339C 28 I 2304C→A Y768X 18 II Afrikaner 225 4015C→T R1339C 28 I 4015C→T R1339C 28 I Afrikaner 226 4015C→T R1339C 28 I 2304C→A Y768X 18 II Afrikaner 228 4015C→T R1339C 28 I 2304C→A Y768X 18 II Afrikaner 229 4015C→T R1339C 28 I 4015C→T R1339C 28 I Afrikaner 213 939insT Frameshift 8 Other ni ni ni Other Afrikaner 214 4015C→T R1339C 28 I ni ni ni Other Afrikaner 224 3421C→T R1141X 24 Other ni ni ni Other Afrikaner 204 ni ni Other ni ni ni Other Afrikaner 212 3421C→T R1141X 24 Other 939insT Frameshift 8 Other UK 215 3775delT Frameshift 27 Other 4104delC Frameshift 29 Other UK 217 ABCC6del15 Frameshift 15 Other ABCC6del15 Frameshift 15 Other Indian 207 3088C→T R1030X 23 Other ni ni ni Other UK 216 3421C→T R1141X 24 Other ni ni ni Other UK 219 1553G→A R518Q 12 Other ni ni ni Other UK 221 ni ni Other ni ni ni Other Black Table 2 Frequencies of mutant ABCC6 alleles found in a cohort of PXE patients of Afrikaner and other ancestries (? Login to comment
60 unidentified alleles, MDR mutation detection rate) Mutation Overall Afrikaner ancestries Others ancestries Allele Allele Allele Allele Allele Allele count frequency (%) count frequency (%) count frequency (%) R1339C 18 37.5 18 52.9 0 0 Y768X 4 8.3 4 11.8 0 0 R1141X 4 8.3 2 5.9 2 14.3 R1138Q 3 6.3 3 8.8 0 0 939insT 2 4.2 1 2.9 1 7.1 ABCC6del15 2 4.2 0 0.0 2 14.3 L673P 1 2.1 1 2.9 0 0.0 R1030X 1 2.1 0 0.0 1 7.1 R518Q 1 2.1 0 0.0 1 7.1 3775delT 1 2.1 0 0.0 1 7.1 4104delC 1 2.1 0 0.0 1 7.1 ? Login to comment
66 Three major haplotypes, with some variation at single markers, encompassing the PXE locus (located between markers D16S405 and D16S764; Le Saux et al. 1999; Cai et al. 2000) were identified (Fig.1) and three disease alleles (R1339C, Y768X, R1138Q) were found to be strictly associated with these three haplotypes (referred to as types I, II and III; Fig.1). Login to comment
81 The three disease alleles, R1339C, Y768X, and R1138X, associated with the type I, II and III haplotypes represent three ancestral founder alleles from which 74% of the Afrikaner alleles have descended. Login to comment
93 Although variant G61D represents a significant amino acid change, this allele was found in an Afrikaner patient homozygous for the mutation R1339C and was therefore considered to be a neutral variant. Login to comment
94 It is noteworthy that one silent variant (IVS28+ 49C→T) co-segregated with the R1339C alleles, as it was found in very close proximity (76 bp) to the 4015C→T substitution responsible for the arginyl to cysteinyl change (Tables 1, 3). Login to comment
100 Although 865-889del was not identified in the 34 chromosomes analysed in Afrikaner PXE patients, data from the present study and previous results (Le Saux et al. 2001) indicated that R1339C is disease-causing and represents the most prevalent founder mutation found to date among South African Afrikaners. Login to comment
101 From the presence of a single R1339C allele in our control panel of 54 apparently unrelated and unaffected Afrikaners, we cannot calculate an accurate estimate of prevalence of these founder mutations in the Afrikaner population, as a much larger cohort of Afrikaners will need to be screened. Login to comment
104 Discussion The present study describes the identification of three PXE disease alleles, R1339C, Y768X and R1138Q, which are associated with three conserved haplotypes (types I, II and III) and which account for 74% of the PXE disease alleles among South African Afrikaners. Login to comment

PMID: 12673275 [PubMed] Hu X et al: "ABCC6/MRP6 mutations: further insight into the molecular pathology of pseudoxanthoma elasticum."

No. Sentence Comment

38 Table 2 Summary of ABCC6/MRP6 mutations associated with PXE known today: our data combined with those of the literature Mutation Protein alteration Nucleotide substitution Location Reference Nonsense Q378X 1132C > T Exon 9 19,20 R518X 1552C > T Exon 2 41 Q749X 2247C > T Exon 17 This study Y768X 2304C > A Exon 18 22 R1030X 3088C > T Exon 23 22 R1141X 3421C > T Exon 24 12,20,22,38,39, this study R1164X 3490C > T Exon 24 12,41 Q1237X 3709C > T Exon 26 22 R1398X 4192C >T Exon 29 22 T364R Missense N411K 1091C > G Exon 9 20 A455P 1233T > G Exon 10 22 R518Q 1363G > C Exon 11 38 F568S 1553G > A Exon 12 22,38 L673P 1703T > C Exon 13 22 R765Q 2018T > C Exon 16 22 R1114P 2294G > A Exon 18 22, this study R1114H 3341G > C Exon 24 22 S1121W 3341G > A Exon 24 This study T1130M 3362C > G Exon 24 22 R1138W 3390C > T Exon 24 This study R1138Q 3412C > T Exon 24 12 R1138P 3413G > A Exon 24 12,22 G1203D 3413G > C Exon 24 22 R1221C 3608G > A Exon 25 22 V1298F 3663C > T Exon 26 This study T1301I 3892G > T Exon 28 22 G1302R 3902C > T Exon 28 22 A1303P 3904G > A Exon 28 22, this study R1314W 3907G > C Exon 28 22, this study R1314Q 3940C > T Exon 28 22 G1321S 3941G > A Exon 28 22 R1339C 3961G > A Exon 28 22 Q1347H 4015C > T Exon 28 22,39 G1354R 4041G > C Exon 28 22 D1361N 4060G > C Exon 29 20,38 K1394N 4081G > A Exon 29 22 I1424T 4182G > T Exon 29 This study R1459C 4271T > C Exon 30 22 4377C > T Exon 30 This study Frameshift IVS17-12delT T Intron 17 This study IVS21+1G>T Intron 21 22,38 IVS26-1G>A Intron 26 12,21,22 179del 9 Exon 2 20 179-195del Exon 2 22 960del C Exon 8 41 1944del22 Exon 16 This study 1995delG Exon 16 22 2322delC Exon 18 22 2542delG Exon 19 41 3775delT Exon 27 This study 4104delC Exon 29 22 4182delG Exon 29 This study 938-939insT Exon 8 22 4220insAGAA Exon 30 This study Large deletion Exons 23-29 21, This study Exon 15 22 ABCC1, ABCC6 41, this study Mutation types The mutation types found in this study are summarized in Table 1. Login to comment

PMID: 12850230 [PubMed] Hu X et al: "Pseudoxanthoma elasticum: a clinical, histopathological, and molecular update."

No. Sentence Comment

193 TABLE 3 Summary of ABCC6 Mutations in PXE Patients Mutation Protein Alteration Nucleotide Substitution Location Reference Nonsense Q378X 1132C Ͼ T Exon 9 16,107 R518X 1552C Ͼ T Exon 12 88 Y768X 2304C Ͼ A Exon 18 67 R1030X 3088C Ͼ T Exon 23 67 R1141X 3421C Ͼ T Exon 24 12,45,67,107,111,112,133 R1164X 3490C Ͼ T Exon 24 88,112 Q1237X 3709C Ͼ T Exon 26 67 R1398X 4192C Ͼ T Exon 29 67 Missense T364R 1091C Ͼ G Exon 9 107 N411K 1233T Ͼ G Exon 10 67 A455P 1363G Ͼ C Exon 11 142 R518Q 1553G Ͼ A Exon 12 67,142 F568S 1703T Ͼ C Exon 13 67 L673P 2018T Ͼ C Exon 16 67 R765Q 2294G Ͼ A Exon 18 67 R1114P 3341G Ͼ C Exon 24 67 S1121W 3362C Ͼ G Exon 24 67 R1138W 3412C Ͼ T Exon 24 111 R1138Q 3413G Ͼ A Exon 24 67,111 R1138P 3413G Ͼ C Exon 24 67 G1203D 3608G Ͼ A Exon 25 67 V1298F 3892G Ͼ T Exon 28 67 T13011 3902C Ͼ T Exon 28 67 G1302R 3904G Ͼ A Exon 28 67 A1303P 3907G Ͼ C Exon 28 67 R1314W 3940C Ͼ T Exon 28 67 R1314Q 3941G Ͼ A Exon 28 67 G1321S 3961G Ͼ A Exon 28 67 R1339C 4015C Ͼ T Exon 28 67,133 Q1347H 4041G Ͼ C Exon 28 67 G1354R 4060G Ͼ C Exon 29 107,142 D1361N 4081G Ͼ A Exon 29 67 11424T 4271T Ͼ C Exon 30 67 Frameshift Splicing IVS21 ϩ 1G ϾT Intron 21 67,142 IVS26-1G ϾA Intron 26 67,111,112 Deletion 179del9 Exon 2 107 179-195del Exon 2 67 960delC Exon 8 88 1944del22 Exon 16 12 1995delG Exon 16 67 2322delC Exon 18 67 2542delG Exon 19 67 3775delT Exon 27 12,67 4101delC Exon 29 67 Insertion 938-939insT Exon 8 67 4220insAGAA Exon 30 12 Intragenic deletion Exon 23-29 67,112 Exon 15 67 Intergenic deletion ABCC6 12,88 LOCAL RETINAL TRANSPORT FUNCTION OF ABCC6 ABCC6 Expression in the Retina Bergen et al detected ABCC6 expression in various tissues in man.12 Low expression levels of ABCC6 were observed in the retina as well as other tissues usually affected by PXE, including skin and vessel wall. Login to comment

PMID: 15459974 [PubMed] Gheduzzi D et al: "ABCC6 mutations in Italian families affected by pseudoxanthoma elasticum (PXE)."

No. Sentence Comment

64 PXE-causative Mutations Recognized (on one and both alleles) in Italian Patients Family/ Proband Affected subjects Age / gender Clinical score Tot Mutations* Allele 1 Allele 2 Mutation type 001 32 F S2,E2 4 p.R518Q p.T1130MI-3097 002 36 M S3,E2,V2,C2 9 p.R518Q p.T1130M I-3013 001 46 F S1,E3 4 p.R1339C None found I-3094 001 57 F S2,E2 4 p.C440G p.P1346S I-3103 001 57 M E2 2 p.V810M p.R1114C I-3076 001 57 F S2,E4,V3 9 p.R1339C p.R1339C I-3016 001 69 F S3,E2,V2 7 p.N411K p.R1138Q missense I-3082 001 23 M S1,E2 3 p.R518Q p.R1141X I-3074 001 27 F S2,E2 4 p.T364R p.R518X I-3015 001 27 F S2,E3 5 p.Q378X p.R600G I-3062 001 45 M S2,E4,V2 8 p.R1141X p.E1400K 001 50 F S1 1 p.R1275X p.E1400K 002 60 F S3,E3 6 p.R1275X p.E1400K I-3067 003 66 F S2,E2 4 p.R1275X p.E1400K 001 61 F S3,E2 4 p.R518Q p.R1141XI-3027 002 63 F S3,E4,V3 10 p.R518Q p.R1141X missense + nonsense 001 23 F S3,E2 5 p.R1141X p.R1141XI-3056** 002 32 M S2,E2 4 p.R1141X p.R1141X 001 27 F S1,E2 3 p.R1141X p.R1141XI-3057** 002 31 M S3,E2 5 p.R1141X p.R1141X 001 28 M S1,E2 3 p.R1141X None foundI-3045 002 32 F S3,E2,V1 6 p.R1141X None found I-3107 001 29 M S2,E1 3 p.R1030X p.R1141X I-3073 001 31 F S3,E2 5 p.R1141X p.R1141X I-3111 001 32 F S1,E2 3 p.R1141X p.R1141X I-3090 001 34 F S2,E1 3 p.R1141X p.R1141X I-3001 001 37 F S3,E2,V2 7 p.R1030X None found 001 40 F S2,E2 4 p.R1141X p.R1141XI-3007** 002 48 F S1,E2 3 p.R1141X p.R1141X I-3114 001 40 M S2,E2,V3,C1,G2 10 p.R518X p.R518X I-3054 001 44 F S2,E3 5 p.R518X p.R518X 001 47 F S3,E4,C2,G1 10 p.R1141X p.R1141XI-3055** 002 50 F S3,E3 6 p.R1141X p.R1141X 001 50 F S3,E4,V3,C2 12 p.R518X p.R1030X 002 52 F S3,E4,V3 10 p.R518X p.R1030X I-3017 003 55 F S3,E2 5 p.R518X p.R1030X I-3100 001 52 M S3,E3 6 p.Q378X p.Q378X I-3051 001 53 F S3,E4,V2 9 p.R1141X p.R1141X I-3034 001 53 M S3,E4,V3 10 p.R1141X p.R1141X I-3093 001 57 F S3,E3,V2,C3 11 p.R518X None found I-3087 001 57 F S3,E4,V2,C2 11 p.Q378X p.Q378X I-3040 001 60 F S3,E4,V2 9 p.R1141X None found I-3033 001 62 F S3,E4 7 p.R1141X p.R1141X nonsense I-3026 001 36 F S3,E2,G1 6 p.R518X c.2248-2_2248- 1del I-3024 001 40 F S1,E2,V3 6 p.R518X p.L1182PfsX96 I-3072 001 41 F S2,E2,C2 6 p.M1127T c.3736-1G>A I-3002 001 50 F S3,E2 5 p.A820P c.3736-1G>A others Family/ Proband Affected subjects Age / gender Clinical score Tot Mutations* Allele 1 Allele 2 Mutation type 002 57 F S2,E4 6 p.A820P c.3736-1G>A I-3008 001 53 F S2,E2,C1 5 p.M1440CfsX24 p.M1440CfsX24 Patients are identified by an international code: I = Italian, 3001 = family number (European patients are numerated from 3000), 001 = subject number. Login to comment
72 ABCC6/MRP6 Mutations Found in Italian PXE Patients Number of families INTRON EXON cDNA* PROTEIN* References 1 9 c.1091C>G p.T364R Pulkkinen et al., 2001 3 9 c.1132C>T p.Q378X Pulkkinen et al., 2001; Cai et al., 2001 1 10 c.1318T>G p.C440G Present study 1 10 c.1233T>G p.N411K Le Saux et al., 2001 7 12 c.1552C>T p.R518X Meloni et al., 2001; Chassaing et al., 2004 3 12 c.1553G>A p.R518Q Le Saux et al., 2001; Chassaing et al., 2004 1 14 c.1798C>T p.R600G Present study 1 17 c.2248-2_2248- 1del - Present study 1 19 c.2428G>A p.V810M Present study 1 19 c.2458G>C p.A820P Present study 3 23 c.3088C>T p.R1030X Le Saux et al., 2001 1 24 c.3340C>T p.R1114C Present study 1 24 c.3380C>T p.M1127T Present study 1 24 c.3389C>T p.T1130M Chassaing et al., 2004; Gotting et al., 2004 1 24 c.3413G>A p.R1138Q Le Saux et al., 2000; Ringpfeil et al., 2000; Le Saux et al., 2001 13 24 c.3421C>T p.R1141X Bergen et al., 2000; Germain et al., 2000; Ringpfeil et al., 2000; Le Saux et al., 2001; Pulkkinen et al., 2001; Uitto et al., 2001; Hu et al., 2003 ; Gotting et al., 2004 1 25 c.3544_3544dupC p.L1182PfsX96 Present study 2 26 c.3736-1G>A - Ringpfeil et al., 2000; Le Saux et al., 2001 1 27 c.3823C>T p.R1275X Present study 2 28 c.4015C>T p.R1339C Le Saux et al., 2001 1 28 c.4036C>T p.P1346S Present study 2 29 c.4198G>A p.E1400K Chassaing et al., 2004 1 30 c.4318_4318delA p.M1440CfsX24 Present study The number of families in which a specific mutation was found (in heterozygous and in homozygous state) is reported. Login to comment

PMID: 15894595 [PubMed] Chassaing N et al: "Pseudoxanthoma elasticum: a clinical, pathophysiological and genetic update including 11 novel ABCC6 mutations."

No. Sentence Comment

378 Interestingly, among the 49 different missense mutations in ABCC6 (42 previously published and seven new ones in the present study), the majority (43) replace critical amino acids in intracellular domains (seven and 19 mutations are located in I1424T R1459C 4220insAGAA 4318delA G1354R D1361N K1394N E1400K R1298X 410delC 418delG 3775delT R1275X R1221C D1238H W1223X Q1237X IVS26-1G→A R1114C R1114H R1114P S1121W M1127T T1130M R1138P R1138Q R1138W R1141X R1164X R765Q A766D Y768X A781V 2322delC IVS19-2delAG T364R R391G Q378X Q363_R373del 938_939insT 960delC IVS8+2delTG G199X Y227X 179_195del 179_187del G226R V74del Q749X IVS17-12delTT IVS14-5T→G IVS13-29T→A R600G V1298F G1299S T1301I G1302R A1303P S1307P R1314Q R1314W G1321S L1335P R1339C P1346S Q1347H R1030X F1048del R807Q V810M A820P 254delG L673P 1944_1966del 1995delG R518Q R518X K502M A455P G992R IVS21+1G→T G1203DF568SN411K C440G IVS25-3C→A 3544dupC Ex23_29del 30 Ex15del ABCC6del 252015105 Figure 10 Position of the mutations in the ABCC6 gene. Login to comment
379 Table 2 ABCC6 mutations Nucleotide variation Protein alteration Location (gene ) Location (protein) Reference Missense 676 GRA G226R Exon 7 CL 3 This study 1091 CRG T364R Exon 9 TS 7 63, 78 1171 ARG R391G Exon 9 CL 4 88 1233 TRG N411K Exon 10 CL 4 63, 90 1318 TRG C440G Exon 10 TS 8 63 1363 GRC A455P Exon 11 TS 9 86 1505 ART K502M Exon 12 CL 5 This study 1553 GRA R518Q Exon 12 CL 5 63, 86, 88, 90 1703 TRC F568S Exon 13 ECL 5 90 1798 CRT R600G Exon 14 CL 6 63 2018 TRC L673P Exon 16 NBF 1 90 2294 GRA R765Q Exon 18 NBF 1 87, 90 2297 CRA A766D Exon 18 NBF 1 88 2342 CRT A781V Exon 18 NBF 1 This study 2420 GRA R807Q Exon 19 NBF 1 This study 2428 GRA V810M Exon 19 NBF1 63 2458 GRC A820P Exon 19 NBF1 63 2965 GRC G992R Exon 22 ECL 6 This study 3340 CRT R1114C Exon 24 CL 8 63 3341 GRA R1114H Exon 24 CL 8 87 3341 GRC R1114P Exon 24 CL 8 90 3362 CRG S1121W Exon 24 CL 8 90 3380 CRT M1127T Exon 24 CL 8 63 3389 CRT T1130M Exon 24 CL 8 63, 87, 88 3412 CRT R1138W Exon 24 CL 8 17 3413 GRC R1138P Exon 24 CL 8 90 3413 GRA R1138Q Exon 24 CL 8 17, 63, 88, 90 3608 GRA G1203D Exon 25 TS17 90 3663 CRT R1221C Exon 26 COOH 87 3712 GRC D1238H Exon 26 COOH 88 3892 GRT V1298F Exon 28 NBF 2 90 3895 GRA G1299S Exon 28 NBF 2 This study 3902 CRT T1301I Exon 28 NBF 2 90 3904 GRA G1302R Exon 28 NBF 2 87, 90 3907 GRC A1303P Exon 28 NBF 2 87, 90 3919 TRC S1307P Exon 28 NBF 2 This study 3940 CRT R1314W Exon 28 NBF 2 90 3941 GRA R1314Q Exon 28 NBF 2 90 3961 GRA G1321S Exon 28 NBF 2 90 4004 TRC L1335P Exon 28 NBF 2 88 4015 CRT R1339C Exon 28 NBF 2 18, 63, 90 4036 CRT P1346S Exon 28 NBF 2 63 4041 GRC Q1347H Exon 28 NBF 2 90 4060 GRC G1354R Exon 29 NBF 2 78, 86 4081 GRA D1361N Exon 29 NBF 2 90 4182 GRT K1394N Exon 29 NBF 2 87 4198 GRA E1400K Exon 29 NBF 2 63, 88 4271 TRC I1424T Exon 30 NBF 2 90 4377 CRT R1459C Exon 30 NBF 2 87 Nonsense 595 CRT G199X Exon 5 89 681 CRG Y227X Exon 7 84 1132 CRT Q378X Exon 9 63, 78, 83 1552 CRT R518X Exon 12 63, 84, 88 2245 CRT Q749X Exon 17 87 2304 CRA Y768X Exon 18 90 3088 CRT R1030X Exon 23 63, 90 3421 CRT R1141X Exon 24 15, 17, 18, 63, 78, 85, 87, 88, 90 3490 CRT R1164X Exon 24 84, 85, 88 3668 GRA W1223X Exon 26 88 3709 CRT Q1237X Exon 26 90 3823 CRT R1275X Exon 27 63 4192 CRT R1398X Exon 29 90 Splicing alteration IVS8+2delTG Intron 8 This study IVS13-29 TRA Intron 13 This study IVS14-5 TRG Intron 14 This study IVS17-12delTT Intron 17 87 IVS18-2delAG Intron 17 63 IVS21+1 GRT Intron 21 86, 90 IVS25-3 CRA Intron 25 88 IVS26-1 GRA Intron 26 17, 63, 90 Insertion 938_939insT Frameshift Exon 8 90 3544dupC Frameshift Exon 25 63 4220insAGAA Frameshift Exon 30 15, 87 Small deletion 179_187del Frameshift Exon 2 78 179_195del Frameshift Exon 2 90 Pseudoxanthoma elasticum www.jmedgenet.com NBF1 and NBF2, respectively), four are located in transmembrane domains, and only two mutations have been identified in extracellular domains. Login to comment
385 A common founder effect was identified for mutation R1141X in French and Italian populations.63 88 We found that arginine codon 518 was a recurrently mutated amino acid in a cohort of 19 French families with PXE (11.5% of the detected mutations for each variant R518Q and R518X).88 These two mutations represent 19% of the mutations detected in the Italian population.63 In Japanese patients, neither R1141X nor Ex23_29del mutations were identified, whereas mutations 2542delG and Q378X account for 53% and 25%, respectively.93 In South African families of Afrikaaners, mutation R1339C represents more than half the mutations detected,28 with a common haplotype indicating a founder effect.27 28 These mutations are rarely identified in American or European populations.90 The detection rate in different studies varies from 0.55 to 0.83.63 87 88 90 Lack of mutation detection in some patients could reflect exonic deletions (for example, deletion of exon 15), splice site mutations distant from the coding sequence, mutations in the gene regulatory sequences, or investigation of patients with acquired PXE-like syndrome not related to ABCC6 mutations, such as seen in b thalassaemia and sickling syndromes (see below).94 95 Locus heterogeneity of PXE is unlikely, but cannot currently be ruled out. Login to comment

PMID: 16086317 [PubMed] Miksch S et al: "Molecular genetics of pseudoxanthoma elasticum: type and frequency of mutations in ABCC6."

No. Sentence Comment

140 The c.4015C4T (p.R1339C) mutation was first identified in a homozygous allelic state in a consanguineous family from Mexico [Struk et al., 2000]. Login to comment
248 An exception is the p.R1339C mutation. Login to comment

PMID: 17617515 [PubMed] Pfendner EG et al: "Mutation detection in the ABCC6 gene and genotype-phenotype analysis in a large international case series affected by pseudoxanthoma elasticum."

No. Sentence Comment

248 Of these, R1339C, R1164X and 2787+1gRc represented 5.0%, 4.7% and 2.8%, respectively, of the 316 alleles identified. Login to comment
249 R1339C was common in the South African Afrikaner population (15 of 40 alleles, 37.5%) and rare in the European/American case series (1/238 alleles). Login to comment
250 The high incidence of R1339C in the South African population is probably due to a founder effect.26 Conversely, R1164X (0/40 alleles) and 2787+1gRc (0 of 40 alleles) were absent in the South African case series but were prevalent in the European and American patient populations. Login to comment
254 Collectively, the mutations in exons 24 and 28, including the common mutations R1141X and del 23-29, accounted for 71.5% of all the 316 mutations identified in this study (table 2), and the 11 most prevalent mutations (R1141X, del23-29, R1339C, R1164X, 2787+1GRT, G1302R, R1138Q, R1138W, Q378X, R1314W, R518Q) accounted for 70% (223 of 316) of the mutant alleles identified (table 2). Login to comment
262 Genotype-phenotype correlations The comparison of subjects whose mutations would probably have resulted in no functional protein with those whose mutations would probably have resulted in some functional Table 2 Distinct mutations identified in the international case series of 271 patients with PXE Nucleotide change*À Predicted consequenceÀ Frequency (alleles) Exon-intron location Domain affected` Mutant alleles (%) References1 c.105delA p.S37fsX80 2 2 0.6 28 c.177-185del9 p.R60_Y62del 1 2 0.3 9, 28 c.179del12ins3 p. R60_W64del L60_R61ins 1 2 0.3 c.220-1gRc SJ 1 IVS 2 0.3 c.724gRt p.E242X 1 7 0.3 c.938insT FS 1 8 0.3 25 c.998+2delT SJ 1 IVS 8 0.3 2, 21 c.998+2del2 SJ 1 IVS 8 0.3 18 c.951cRg p.S317R 2 9 TM6 0.6 28 c.1087cRt p.Q363X 1 9 0.3 c.1091gRa p.T364R 1 9 TM7 0.3 9, 19, 21, 28 c.1132cRt p.Q378X 4 9 1.2 9, 17-19, 28, 37 c.1144cRt p.R382W 2 9 IC4 0.6 c.1171aRg p.R391G 3 9 IC4 0.9 9, 18, 28, 37 c.1176gRc p.K392N 1 9 IC4 0.3 c.1388tRa p.L463H 1 11 TM9 0.3 c.1484tRa p.L495H 1 12 IC5 0.3 28 c.1552cRt p.R518X 2 12 0.6 18, 19, 27, 28, 37 c.1553gRa p.R518Q 4 12 IC5 1.2 18, 19, 24, 28, 31 c.1603tRc p.S535P 1 12 TM10 0.3 c.1703tRc p.F568S 1 13 TM11 0.3 24 c.1798cRt p.R600C 1 14 TM11 0.3 c.1857insC FS 1 14 0.3 c.1987gRt p.G663C 1 16 NBF1 0.3 c.1999delG FS 1 16 0.3 c.2070+5GRA SJ 2 IVS 16 0.6 c.2093aRc p.Q698P 2 17 NBF1 0.6 c.2097gRt p.E699D 1 17 NBF1 0.3 c.2177tRc p.L726P 1 17 NBF1 0.3 c.2237ins10 FS 2 17 0.6 c.2252tRa p.M751K 1 18 NBF1 0.3 20, 37 c.2263gRa p.G755R 2 18 NBF1 0.6 c.2278cRt p.R760W 3 18 NBF1 0.9 20, 28, 32, 37 c.2294gRa p.R765Q 2 18 NBF1 0.6 20-22, 25, 28, 32, 37 c.2329gRa p.D777N 1 18 NBF1 0.3 c.2359gRt p.V787I 1 18 NBF1 0.3 c.2432cRt p.T811M 1 19 IC6 0.3 6 c.2643gRt p.R881S 1 20 IC6 0.3 c.2787+1GRT SJ 9 IVS 21 2.8 17, 20, 24, 28, 31, 37 c.2814cRg p.Y938X 1 22 0.3 c.2820insC FS 1 22 0.3 c.2831cRt p.T944I 1 22 TM12 0.3 c.2848gRa p.A950T 1 22 TM12 0.3 c.2974gRc p.G992R 1 22 TM13 0.3 2, 42 c.3340cRt p.R1114C 2 24 IC8 0.6 19, 28, 32, 37, 41 c.3389cRt p.T1130M 3 24 IC8 0.9 18, 19, 21, 22, 28, 30, 32, 37, 41 c.3398gRc p.G1133A 1 24 IC8 0.3 c.3412gRa p.R1138W 7 24 IC8 2.2 28, 30, 37 c.3413cRt p.R1138Q 7 24 IC8 2.2 18, 19, 24, 25, 28, 30, 32, 37, 41 c.3415gRa p.A1139T 2 24 IC8 0.6 c.3415gRa & c.2070+5GRA* p.A1139T & SJ 1 24, IVS 16 IC8 0.3 c.3415gRa & c.4335delG* p.A1139T & FS 1 24, 30 IC8 0.3 c.3421cRt p.R1141X 92 24 29.3 5, 9, 15,18, 19, 21, 22, 24, 28, 30-32, 33, 37, 41 c.3427cRt p.Q1143X 1 24 0.3 c.3490cRt p.R1164X 15 24 4.7 18, 27, 28, 31, 33 c.3491gRa p.R1164Q 1 24 IC8 0.3 28 c.3661cRt p.R1221C 1 26 IC9 0.3 21, 22, 28, 29 c.3662gRa p.R1221H 2 26 IC9 0.6 40 c.3676cRa p.L1226I 1 26 IC9 0.3 c.3722gRa p.W1241X 2 26 0.6 c.3774insC FS 2 27 0.6 c.3775delT p.G1259fsX1272 3 27 0.9 15, 25, 28, 41 c.3880-3882del p.K1294del 1 27 0.3 c.3883-5GRA SJ 1 IVS 27 0.3 c.3892gRt p.V1298F 1 28 NBF2 0.3 25 c.3904gRa p.G1302R 7 28 NBF2 2.2 21, 22, 25, 28 c.3907gRc p.A1303P 1 28 NBF2 0.3 21, 22, 25, 28 c.3912delG FS 1 28 0.3 28 c.3940cRt p.R1314W 4 28 NBF2 1.2 24, 25, 32, 36 c.3941gRa p.R1314Q 1 28 NBF2 0.3 25, 28, 32, 36, 41 c.4004tRa p.L1335Q 1 28 NBF2 0.3 c.4015cRt p.R1339C 16 28 NBF2 5.0 19, 25, 28, 33 c.4016gRa p.R1339H 2 28 NBF2 0.6 c.4025tRc p.I1342T 1 28 NBF2 0.3 protein did not yield significant differences. Login to comment

PMID: 18253096 [PubMed] Plomp AS et al: "ABCC6 mutations in pseudoxanthoma elasticum: an update including eight novel ones."

No. Sentence Comment

92 Mutational analysis of ABCC6 in case 7 revealed the earlier reported mutation, c.4015C>T (p.Arg1339Cys) [25], and the novel mutation, c.4306_4312del. Login to comment

PMID: 19339160 [PubMed] Ramsay M et al: "Spectrum of genetic variation at the ABCC6 locus in South Africans: Pseudoxanthoma elasticum patients and healthy individuals."

No. Sentence Comment

18 Results: The Afrikaner founder mutation, R1339C, was present in 0.41 of white ABCC6 PXE alleles, confirming the founder effect and its presence in both Afrikaans- (34/63 PXE alleles) and English-speakers (4/28). Login to comment
20 The five ''Coloured`` patients (of mixed Khoisan, Malay, European and African origin) included three compound heterozygotes with R1339C as one of the mutations. Login to comment
79 A restriction enzyme digest assay was designed, using HhaI digestion, to identify the R1339C mutation. Login to comment
97 There is a single common mutation, R1339C, that has attained the high frequency of 0.41 (39/95) among PXE alleles. Login to comment
101 The language distribution among white PXE patients showed clear evidence of a founder effect for the R1339C mutation, which accounts for 0.54 (34/63 PXE alleles) in Afrikaans-speakers, but only 0.14 (4/28) in English-speakers (Table 2). Login to comment
121 of alleles with mutation Frequency R1339C c.4015C>T 28 NBF2 18 0.375 21 0.447 0.411 (39) [30-32] R1138Q c.3413G>A 24 CL8 5 0.104 1 0.021 0.063 (6) [3,7,32] Y768X c.2304C>A 18 NBF1 5 0.104 3 0.064 0.084 (8) [31] R1141X c.3421C>T 24 CL8 4 0.083 5 0.106 0.095 (9) [3,6,13] R518Q c.1553G>A 12 CL5 2 0.042 1 0.021 0.032 (3) [31-33] Deletion ABCC6del23-29 23-29 - 1 0.021 2 0.043 0.032 (3) [6,16,31,32] L1335P c.4004T>C 28 NBF2 2 0.042 - - Other = 0.063 (6) [3] G1302R c.3904G>A 28 NBF2 1 0.021 - - [31] L726P c.2177T>C 17 NBF1 1 0.021 - - This Study Frameshift c.3775delT 27 CL9 1 0.021 - - [6] Frameshift c.4104delC 29 NBF2 1 0.021 - - [31] Unknown - - - 7 0.146 14 0.298 0.221 (21) - Total 48 47 Mutation detection rate 0.855 0.702 0.717 a ''Coloured``, black and Indian patients are excluded from the table because of the small sample size. Login to comment
136 Three of the five ''Coloured`` patients were compound heterozygotes with R1339C and an unknown allele. Login to comment
145 Mutation Afrikaans-speakersa English-speakersa No. Frequency No. Frequency R1339C 34 0.54 4 0.14 R1138Q 5 0.08 1 0.04 Y768X 5 0.08 3 0.11 R1141X 5 0.08 4 0.14 R518Q 1 0.02 2 0.07 del23-29 0 - 3 0.11 Other 0 - 4 0.14 Unknown 13 0.21 7 0.25 Total no. alleles 63 28 a Only 2 families were bilingual Afrikaans/English speaking and not included in this table. Login to comment
146 Their PXE genotypes were R1339C/unknown and L726P/unknown. Login to comment
158 In white South Africans there is a high frequency founder mutation, R1339C [11], but the distribution of this mutation differs markedly between the Afrikaans- and English-speakers, at 0.54 and 0.14, respectively. Login to comment
195 It detects 79.2% of the PXE mutations in white South African patients including: R1339C, R1138Q, Y768X, R1141X, R518Q, del23-29, L1335P and G1302R (calculated according to detection Strategy 1, Table 1). Login to comment

PMID: 21167005 [PubMed] Larusso J et al: "Pseudoxanthoma elasticum: a streamlined, ethnicity-based mutation detection strategy."

No. Sentence Comment

23 Two mutations seem to be present worldwide without evidence of a founder effect, p.Q378X and p.R1339C, suggesting the presence of mutational hotspots. Login to comment
42 A total of eight recurrent mutations were distinguished in the cohort, including nonsense (p.Q378X and p.R1141X), missense (p.R1138W and p.R1339C), splice site (3736-1G/A, 2787 + 1G/T), frameshift (2542 delG), and multiexon deletion (del exon 23-29). Login to comment
53 Two additional core mutations established in Mediterraneans and Scandinavians were p.Q378X and p.R1339C. Login to comment
54 p.R1339C segregated exclusively in 11.5% of Mediterraneans and 9.1% of Scandinavians. Login to comment
81 p.R1339C appeared in Northern Europeans and Scandinavians, whereas p.Q378X was presentworldwide.Thesplicesitemutation2787+1G/Twasfound in French Canadians and Northern Europeans. Login to comment
90 Nevertheless, evidence for a founder effect has been previously reported in the Afrikaner population in South Africa, in which 53% of the PXE alleles harbored pathogenetic p.R1339C mutation.18 In summary, we have identified a set of recurrent mutations in theABCC6geneamongfivedifferentethnicgroups.Knowledgeof apatients`ethnicorigincanfacilitateanefficientscreeningstrategy. Login to comment

PMID: 16763870 [PubMed] Ladewig MS et al: "[Pseudoxanthoma elasticum]."

No. Sentence Comment

272 Internetadressen PXE-Selbsthilfegruppe Deutschland : http://www.pxe-groenblad.de PXE International: http://www.pxe.org Tabelle 5 PXE verursachende Mutationen imabcc6-Gen Klassifikation Lokalisation Gen Protein Missense Exon 9 Exon 9 Exon 10 Exon 10 Exon 11 Exon 12 Exon 13 Exon 14 Exon 16 Exon 18 Exon 18 Exon 18 Exon 18 Exon 19 Exon 19 Exon 19 Exon 22 Exon 24 Exon 24 Exon 24 Exon 24 Exon 24 Exon 24 Exon 24 Exon 24 Exon 24 Exon 25 Exon 26 Exon 26 Exon 26 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 28 Exon 29 Exon 29 Exon 29 Exon 29 Exon 29 Exon 30 Exon 30 Exon 30 c.1091CaG c.1171AaG c.1233TaG c.1318TaG c.1363GaC c.1553GaA c.1703TaC c.1798CaT c.2018TaC c.2252TaA c.2278CaT c.2294GaA c.2297CaA c.2428GaA c.2458GaC c.2552TaC c.2855TaG c.3340CaT c.3341GaA c.3341GaC c.3362CaG c.3380CaT c.3389CaT c.3412CaT c.3413GaA c.3413GaC c.3608GaA c.3661CaT c.3712GaC c.3715TaC c.3892GaT c.3902CaT c.3904GaA c.3907GaC c.3932GaA c.3940CaT c.3941GaA c.3961GaA c.3976GaA c.4004TaC c.4015CaT c.4036CaT c.4041GaC c.4060GaC c.4069CaT c.4081GaA c.4182GaT c.4198GaA c.4209CaA c.4271TaC c.4377CaT p.T364R p.R391G p.N411K p.C440G p.A455P p.R518Q p.F568S p.R600G p.L673P p.M751K p.R760W p.R765Q p.A766D p.V810M p.A820P p.L851P p.F952C p.R1114C p.R1114H p.R1114P p.S1121W p.M1127T p.T1130M p.R1138W p.R1138Q p.R1138P p.G1203D p.R1221C p.D1238H p.Y1239H p.V1298F p.T1301I p.G1302R p.A1303P p.G1311E p.R1314W p.R1314Q p.G1321S p.D1326N p.L1335P p.R1339C p.P1346S p.Q1347H p.G1354R p.R1357W p.D1361N p.K1394N p.E1400K p.S1403R p.I1424T p.R1459C Klassifikation Lokalisation Gen Protein Nonsense Exon 9 Exon 12 Exon 17 Exon 18 Exon 23 Exon 24 Exon 24 Exon 26 Exon 26 Exon 27 Exon 29 c.1132CaT c.1552CaT c.2247CaT c.2304CaA c.3088CaT c.3421CaT c.3490CaT c.3668GaA c.3709CaT c.3823CaT c.4192CaT p.Q378X p.R518X p.Q749X p.Y768X p.R1030X p.R1141X p.R1164X p.W1223X p.Q1237X p.R1275X p.R1398X Spleißstellen Intron 21 Intron 25 Intron 26 c.2787+1GaT c.3634-3CaA c.3736-1GaA Insertion Exon 8 Exon 25 Exon 30 c.938-939insT c.3544dupC c.4220insAGAA Deletion Exon 2 Exon 2 Exon 3 Exon 8 Exon 9 Exon 16 Exon 16 Exon 18 Exon 19 Exon 22 Exon 27 Exon 29 Exon 29 Exon 30 Exon 31 c.179del9 c.179-195del c.220-222del c.960delC c.1088-1120del c.1944del22 c.1995delG c.2322delC c.2542delG c.2835-2850del16 c.3775delT c.4101delC c.4182delG c.4318delA c.4434delA Intragenische Deletion Exon 15 Exon 18 Exon 23-29 delEx15 delEx18 delEx23-29 Intergenische Deletion ABCC6 delABCC6 Fazit für die Praxis Eine spezifische Behandlung der Grunderkrankung ist nicht bekannt. Login to comment

PMID: 17251343 [PubMed] Shi Y et al: "Development of a rapid, reliable genetic test for pseudoxanthoma elasticum."

No. Sentence Comment

82 Nuclease Digestion Fragment Sizes of Common Mutations in PXE Exon 24 and 28 Amino acid change Base change Fragment lengths (bp) p.T1130M c.3389CϾT 251,257/508 p.R1138W c.3412CϾT 274,234/508 p.R1138Q c.3413GϾA 275,233/508 p.R1141X c.3421CϾT 281,227/508 p.R1164X c.3490CϾT 352,156/508 p.G1302R c.3904GϾA 116,289/405 p.R1314Q c.3941GϾA 153,252/405 p.R1339C c.4015CϾT 227,178/405 The total lengths of the amplicons are listed after the slash. Login to comment
84 Patients 5 and 16 each had a mutation corresponding to c.4015CϾT (p.R1339C) (cleavage fragments of ϳ180 and ϳ230 bp), and patients 8 and 9 had one mutation corresponding to c.3904GϾA (p.G1302R) (fragments of ϳ120 and ϳ290 bp). Login to comment
107 The two most prevalent mutations were the nonsense mutations c.3421CϾT (p.R1141X) and c.3490CϾT (p.R1164X) in exon 24. c.3421CϾT is the most common mutation found in PXE patients of European origin.14,19,20,23,29 c.3490CϾT is a common mutation in individuals of British descent.16,21 Two DNA samples carried the c.3490CϾT (p.R1339C) missense mutation in one exon 28 allele, and in both cases, IVS28 ϩ 49CϾT was also present. Login to comment

PMID: 23483032 [PubMed] Aranyi T et al: "Transcriptional regulation of the ABCC6 gene and the background of impaired function of missense disease-causing mutations."

No. Sentence Comment

56 Five missense mutations, V1298F and G1321S in the C-proximal ABC domain and R1138Q, R1314W, and R1339C at the transmission interface were included into the study. Login to comment
72 The R1339C and the G1321S proteins were found intracellularly (similar to the results obtained in the in vitro cell culture system). Login to comment
74 ABCC6 variant Stability in Sf9 MgATP-binding ATPase catalytic intermediate Transport activity (% of WT) Plasma membrane localization in MDCKII cells Plasma membrane localization in mouse liver Intracellular localization in mouse liver WT Stable Yes Yes 100 +++++ +++++ - DABCC6 Stable n.d. n.d. <10 - - +++++ R1138Q Stable Yes Yes ~85 ++++ ++ +++ V1298F Stable Yes No <10 +++++ +++++ - G1321S Stable Yes No <10 - - +++++ R1314W Stable Yes Yes ~90 - + ++++ (ER) R1339C Unstable n.a. n.a. n.a. - - +++++ n.d., not determined; n.a., not applicable; ER, mostly retained with the endoplasmic reticulum. Login to comment
87 R1138Q and R1314W were tested, along with R1339C and the WT protein as non-functional and functional controls respectively. Login to comment
89 We have found that R1314 shows ER retain, as it colocalized with an ER-marker in mouse hepatocytes, while R1338Q and R1339C was not found in this location. Login to comment
90 Oral treatment of the animals with 4-PBA before HTVI resulted in no effect on the intracellular localization of R1338Q and R1339C. Login to comment

PMID: 24352041 [PubMed] Pomozi V et al: "Analysis of pseudoxanthoma elasticum-causing missense mutants of ABCC6 in vivo; pharmacological correction of the mislocalized proteins."

No. Sentence Comment

48 The R1339C was found to be unstable in Sf9 cells, similar to that shown earlier (Le Saux et al., 2011), and its transport activity could not be assayed. Login to comment
82 No 4-PBA-induced plasma membrane rescue was observed for R1138Q and T1301I in mouse liver, whereas Extracellular Walker B Q-loop Signature Missense mutations Intercellular 140 ABCC6 wt V1298F G1321S R1114P R1138Q R1314W R1459C S1121W T1301I Q1347H delABCC6 120 100 80 60 40 20 0 LTC4 transport activity (%) TMD0 L0 TMD1 L1 TMD2 R1114P S1121W R1138Q T1301I R1314W G1321S R1339C R1459C Q1347H Figure 1. Login to comment
94 No plasma membrane targeting was achieved in the case of mutant R1339C irrespective of which experimental system was used. Login to comment
101 Of the three remaining mutants, only two displayed decreased transport function (Figure 1b), whereas the other mutant could not be stably expressed in Sf9 cells (R1339C). Login to comment
105 We achieved a good level of expression of the R1339C mutant in this culture model. Login to comment
113 MDCKII cell line in vitro Nonpolarized - 4-PBA 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m 20 &#b5;m Wild type R1114P S1121W R1138Q V1298F T1301I R1314W G1321S R1339C Q1347H R1459C deltaABCC6 - 4-PBA + 4-PBA + 4-PBA Not determined Polarized intended to correct their cellular localization, as described previously (Le Saux et al., 2011). Login to comment
126 Mouse liver in vivo - 4-PBA Not determined Not determined Not determined Wild type R1114P S1121W R1138Q V1298F T1301I R1314W G1321S R1339C Q1347H R1459C deltaABCC6 + 4-PBA Figure 4. Login to comment
150 Summary of the characterization and rescue of disease-causing ABCC6 mutants Localization in mouse liver Localization in MDCKII cell line Nonpolarized Polarized ABCC6 variant Sf9 transport activity Without treatment After 4-PBA treatment Without treatment After 4-PBA treatment Without treatment After 4-PBA treatment Zebrafish &#fe; mRNA rescue (%) Wild type Active PM1 PM PM PM PM PM 90.6 R1114P Active IC4PM PM (rescue) ICoPM PM (rescue) PM PM 0.0 S1121W Active IC4PM PM (rescue) PM PM PM PM 7.9 R1138Q Active IC4PM IC4PM (no effect) IC PM (rescue) PM PM 1.8 V1298F o20% PM ND PM PM PM ND 32.0 T1301I Active IC4PM IC4PM (no effect) IC4PM PM (rescue) PM PM 5.1 R1314W1 Active IC4PM PM (rescue) IC PM (rescue) IC4PM PM (rescue) 0.0 G1321S o20% IC ND IC4PM IC4PM (no effect) IC IC (no effect) 0.0 R1339C Not stable IC IC (no effect) IC IC (no effect) IC IC (no effect) 0.0 Q1347H Active IC4PM PM (rescue) IC4PM PM (rescue) IC &#bc; PM IC&#bc; PM (no effect) 0.8 R1459C Active PM ND IC &#bc; PM PM (rescue) ICoPM ICoPM (no effect) 0.0 delABCC6 o20% IC IC IC IC IC IC ND R1141X Stop ND ND ND ND ND ND 4.8 Abbreviations: IC, intracellular; ND, not determined; PM, plasma membrane. Login to comment