ABCMdb

ABCC7 p.Met152Val

ClinVar:	c.454A>G , p.Met152Val ? , not provided c.455T>G , p.Met152Arg ? , not provided
CF databases:	c.454A>G , p.Met152Val (CFTR1) ? , This mutation was discovered by SSCP. Probes synthesized for the normal and the mutant sequences showed that the patient was homozygous for this mutation. A vlaine for a methionine change is usually regarded as a conservative one and one not causing disease. The patient in question, who is Egyptian, is 21 years old and has a somewhat mild disease and does not have any of the common mutations. Whether being homozygous for this change is enough to cuase CF or other mutation are to be found in her CFTR gene will require further study. No mutations have been found by SSCP in exon 7, 10, 11 and 21 so far. c.454A>T , p.Met152Leu (CFTR1) ? , c.455T>G , p.Met152Arg (CFTR1) ? , T->G alteration at cDNA 587 in exon 4, resulting in Met (ATG) to Arg (AGG) change at the amino acid residue 152. It also produces a new restriction site with enzyme Mnl I. Restriction digestion of a PCR-amplified fragment of exon 4 with this enzyme further confirmed the presence of this mutation in the patient. The patient is a 11-month girl born to healthy Japanese parents without consanguineous marriage. At birth, she was found to have meconium ileus and subsequently underwent surgical operation for it. She also has pancreatic insufficiency and pulmonary manifestations such as cough anfd sputum, and exhibited high sweat Cl level (126 mEq/L), indicating that she has a clinical phenotype of typical CF. Genetic analysis using PCR-SSCP combined with direct sequencing revealed that she is a compound heterozygote with two novel CFTR mutations: 1540del10 and M152R
Predicted by SNAP2:	A: D (63%), C: D (53%), D: D (85%), E: D (80%), F: D (53%), G: D (80%), H: D (80%), I: N (87%), K: D (85%), L: N (82%), N: D (80%), P: D (85%), Q: D (71%), R: D (71%), S: D (53%), T: D (71%), V: N (72%), W: D (85%), Y: D (75%),
Predicted by PROVEAN:	A: N, C: D, D: D, E: D, F: N, G: D, H: D, I: N, K: D, L: N, N: D, P: D, Q: D, R: D, S: D, T: N, V: N, W: D, Y: D,

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[hide] Cystic fibrosis: a worldwide analysis of CFTR muta... Hum Mutat. 2002 Jun;19(6):575-606. Bobadilla JL, Macek M Jr, Fine JP, Farrell PM
Cystic fibrosis: a worldwide analysis of CFTR mutations--correlation with incidence data and application to screening.
Hum Mutat. 2002 Jun;19(6):575-606., [PMID:12007216]

Abstract [show]
Although there have been numerous reports from around the world of mutations in the gene of chromosome 7 known as CFTR (cystic fibrosis transmembrane conductance regulator), little attention has been given to integrating these mutant alleles into a global understanding of the population molecular genetics associated with cystic fibrosis (CF). We determined the distribution of CFTR mutations in as many regions throughout the world as possible in an effort designed to: 1) increase our understanding of ancestry-genotype relationships, 2) compare mutational arrays with disease incidence, and 3) gain insight for decisions regarding screening program enhancement through CFTR multi-mutational analyses. Information on all mutations that have been published since the identification and cloning of the CFTR gene's most common allele, DeltaF508 (or F508del), was reviewed and integrated into a centralized database. The data were then sorted and regional CFTR arrays were determined using mutations that appeared in a given region with a frequency of 0.5% or greater. Final analyses were based on 72,431 CF chromosomes, using data compiled from over 100 original papers, and over 80 regions from around the world, including all nations where CF has been studied using analytical molecular genetics. Initial results confirmed wide mutational heterogeneity throughout the world; however, characterization of the most common mutations across most populations was possible. We also examined CF incidence, DeltaF508 frequency, and regional mutational heterogeneity in a subset of populations. Data for these analyses were filtered for reliability and methodological strength before being incorporated into the final analysis. Statistical assessment of these variables revealed that there is a significant positive correlation between DeltaF508 frequency and the CF incidence levels of regional populations. Regional analyses were also performed to search for trends in the distribution of CFTR mutations across migrant and related populations; this led to clarification of ancestry-genotype patterns that can be used to design CFTR multi-mutation panels for CF screening programs. From comprehensive assessment of these data, we offer recommendations that multiple CFTR alleles should eventually be included to increase the sensitivity of newborn screening programs employing two-tier testing with trypsinogen and DNA analysis.

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112 Jewish 1) 405+1G®A (48.0%) 3) W1282X (17.0%) - - 4 23 Kerem et al. [1995] (Tunisia) 2) DF508 (31.0%) 4) 3849+10KbC®T (4.0%) Jewish 1) G85E 4) G542X - - 6 10 Kerem et al. [1995] (Turkey) 2) DF508 5) 3849+10KbC®T 3) W1282X 6) W1089X Jewish (Yemen) None - - 0 5 Kerem et al. [1995] Lebanon 1) DF508 (35.0%) 6) 4096-28G®A (2.5%) - - 9 40 Desgeorges et al. [1997] 2) W1282X (20.0%) 7) 2789+5G®A (2.5%) 3) 4010del4 (10.0%) 8) M952I (2.5%) 4) N1303K (10.0%) 9) E672del (2.5%) 5) S4X (5.0%) Reunion ∆F508 (52.0%) 1717-1G→A (0.7%) 90.4 81.7 9 138 Cartault et al. [1996] Island Y122X (24.0%) G542X (0.7%) 3120+1G→A (8.0%) A309G (0.7%) A455E (2.2%) 2789+5G→A (0.7%) G551D (1.4%) Saudi North: 3) H139L - - North 1 49 families El-Harith et al. [1997]; Arabia 1) 1548delG 4) L1177X Central 3 Kambouris et al. [1997]; Central: 5) DF508 South 4 Banjar et al. [1999] 1)I1234V 6) 3120+1G®A West 9 2)1548delG 7) 425del42 East 6 3)DF508 8) R553X South: 9) N1303K 1) I1234V East: 2) 1548delG 1) 3120+1G®A 3) 711+1G®T 2) H139L 4) 3120+1G®A 3) 1548delG West: 4) DF508 1) I1234V 5) S549R 2) G115X 6) N1303K Tunisia ∆F508 (17.6%) G85E (2.6%) 58.7 34.5 11 78 Messaoud et al. [1996] G542X (8.9%) W1282X (2.6%) 711+1G→T (7.7%) Y122X (1.3%) N1303K (6.4%) T665S (1.3%) 2766del8NT (6.4%) R47W+D1270N (1.3%) R1066C (2.6%) Turkeye ∆F508 (24.5%) 1066L (1.3%) 80.6 65.0 36 1067/670 Yilmaz et al. [1995]; Estivill et al. 1677delTA (4.1%) E822X (1.3%) [1997]; Onay et al. [1998]; 2789+5G→A (3.9%) 2183+5G→A+2184insA (1.3%) Macek et al. [2002] 2181delA (3.8%) D110H (0.8%) R347H (3.6%) P1013L (0.8%) N1303K (2.9%) 3172delAC (0.8%) 621+1G→T (2.6%) 1259insA (0.8%) G542X (2.6%) M1028I (0.8%) TABLE 1. Continued. Estimated Projected detection of Number of Number of Country/ allele two CFTR mutations chromosomes Region Mutation array detectiona mutationsb includedc (max/min)d Reference WORLDWIDEANALYSISOFCFTRMUTATIONS587 E92K (2.6%) 4005+1G→A (0.7%) A96E (2.6%) W1282X (0.7%) M152V (2.6%) I148T (0.6%) 2183AA→G (2.5%) R1162X (0.6%) 296+9A→T (1.6%) D1152H (0.6%) 2043delG (1.4%) W1098X (0.6%) E92X (1.4%) E831X (0.6%) K68N (1.4%) W496X (0.6%) G85E (1.3%) F1052V (0.5%) R1158X (1.3%) L571S (0.5%) United Arab S549R (61.5%) ∆F508 (26.9%) 88.4 78.1 2 86/52 Frossard et al. [1988]; Emirates Frossard et al. [1999] North/Central/South Americas Argentina ∆F508 (58.6%) N1303K (1.8%) 69.1 47.7 5 326/228 CFGAC [1994]; Chertkoff et al. W1282X (3.9%) 1717-1G→A (0.9%) [1997] G542X (3.9%) Brazilf ∆F508 (47.7%) W1282X (1.3%) 66.8 44.6 10 820/500 CFGAC [1994]; Cabello et al. (total) G542X (7.2%) G85E (1.3%) [1999]; Raskin et al. [1999]; R1162X (2.5%) R553X (0.7%) Bernardino et al. [2000] R334W (2.5%) L206W (0.6%) N1303K (2.4%) 2347delG (0.6%) South East: >∆F508, G542X South: >N1303K Brazil ∆F508 (31.7%) N1303K (2.5%) 42.5 18.1 3 120 Parizotto and Bertuzzo [1997] (Sao Paulo) G542X (8.3%) Canada ∆F508 (59.0%) G542X (0.5%) 98.5 97.0 13 381/200 Rozen et al. [1992]; (Lac St. Jean) 621+1G→T (24.3%) N1303K (0.5%) De Braekeleer et al. [1998] A445E (8.2%) Q890X (0.5%) Y1092X (1.2%) S489X (0.5) 711+1G→T (1.0%) R117C (0.5%) I148T (1.0%) R1158 (0.5%) G85E (0.8%) Canada ∆F508 (71.4%) ∆I507 (1.3%) 90.9 82.6 7 77 Rozen et al. [1992] (Quebec City) 711+1G→T (9.1%) Y1092X (1.3%) 621+1G→T (5.2%) N1303K (1.3%) A455E (1.3%) Canada ∆F508 (70.9%) W1282X (0.9%) 82.0 67.2 10 632 Kristidis et al. [1992] (Toronto) G551D (3.1%) R117H (0.9%) G542X (2.2%) 1717-1G→A (0.6%) 621+1G→T (1.3%) R560T (0.6%) N1303K (0.9%) ∆I507 (0.6%) Chile ∆F508 (29.2%) R553X (4.2%) 33.4 11.2 2 72 Rios et al. [1994] Columbia 1) DF508 (35.4%) 3) N1303K (2.1%) - - 4 48 Restrepo et al. [2000] 2) G542X (6.3%) 4) W1282X (2.1%) Ecuador 1) DF508 (25%) - - 1 20 Paz-y-Mino et al. [1999] (Continued) BOBADILLAETAL. Login to comment

[hide] Deletion of CFTR translation start site reveals fu... Cell Physiol Biochem. 2009;24(5-6):335-46. Epub 2009 Nov 4. Ramalho AS, Lewandowska MA, Farinha CM, Mendes F, Goncalves J, Barreto C, Harris A, Amaral MD
Deletion of CFTR translation start site reveals functional isoforms of the protein in CF patients.
Cell Physiol Biochem. 2009;24(5-6):335-46. Epub 2009 Nov 4., [PMID:19910674]

Abstract [show]
BACKGROUND/AIMS: Mutations in the CFTR gene cause Cystic Fibrosis (CF) the most common life-threatening autosomal recessive disease affecting Caucasians. We identified a CFTR mutation (c.120del23) abolishing the normal translation initiation codon, which occurs in two Portuguese CF patients. This study aims at functionally characterizing the effect of this novel mutation. METHODS: RNA and protein techniques were applied to both native tissues from CF patients and recombinant cells expressing CFTR constructs to determine whether c.120del23 allows CFTR protein production through usage of alternative internal codons, and to characterize the putative truncated CFTR form(s). RESULTS: Our data show that two shorter forms of CFTR protein are produced when the initiation translation codon is deleted indicating usage of internal initiation codons. The N-truncated CFTR generated by this mutation has decreased stability, very low processing efficiency, and drastically reduced function. Analysis of mutants of four methionine codons downstream to M1 (M82, M150, M152, M156) revealed that each of the codons M150/M152/M156 (exon 4) can mediate CFTR alternative translation. CONCLUSIONS: The CFTR N-terminus has an important role in avoiding CFTR turnover and in rendering effective its plasma membrane traffic. These data correlate well with the severe clinical phenotype of CF patients bearing the c.120del23 mutation.

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126 jointly mutated into valines and the respective stable cells wereanalysedbyimmunoblotforCFTR.ResultsinFig.5A reveal the presence of two proteins (D and E) for single mutants of M82V, M150V, M152V and M156V (lanes 36, respectively) and also for the double mutants M150V/ M152, M150V/M156V and M152V/M156V (lanes 7-9). Login to comment
130 Individual and double mutations of M82V, M150V and M152V (lanes 5-8) did not cause loss of either protein species D or E, consistent with the corresponding constructs in the in vivo assay. Login to comment
131 The mutant M82V/M150V/M152V (lane 4) does not alter the production of proteins D and E either. Login to comment
140 Lanes 3-10 correspond to the proteins produced by the methionines mutants all in the c.120del23-CFTR pNUT background: lane 3, M82V; lane 4, M150V; lane 5 M152V; lane 6, M156V; lane 7, M150V/M152V; lane 8, M150V/M156V; lane 9, M152V/M156V; lane 10, M150V/M152V/M156V. Login to comment
144 Lanes 2-8 all in pSP73: 2, CFTR exons 2-24; 3, M82V/ M150V/M152V/M156V; 4, M82V/M150V/M152V; 5, M82/M152V; 6, M82V/M150V;7, M150; 8, M82V. Login to comment
148 However, when the triple mutant (M150V/M152V/M156V) was analysed (lane 10, Fig.5A), only the lower form (E ~128 kDa) could be detected. Login to comment

[hide] Detection of CFTR mutations using temporal tempera... Electrophoresis. 2004 Aug;25(15):2593-601. Wong LJ, Alper OM
Detection of CFTR mutations using temporal temperature gradient gel electrophoresis.
Electrophoresis. 2004 Aug;25(15):2593-601., [PMID:15300780]

Abstract [show]
Cystic fibrosis (CF), caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, is one of the most common autosomal recessive diseases with variable incidences and mutation spectra among different ethnic groups. Current commercially available mutation panels designed for the analysis of known recurrent mutations have a detection rate between 38 to 95%, depending upon the ethnic background of the patient. We describe the application of a novel mutation detection method, temporal temperature gradient gel electrophoresis (TTGE), to the study of the molecular genetics of Hispanic CF patients. TTGE effectively identified numerous rare and novel mutations and polymorphisms. One interesting observation is that the majority of the novel mutations are splice site, frame shift, or nonsense mutations that cause severe clinical phenotypes. Our data demonstrate that screening of the 27 exons and intron/exon junctions of the CFTR gene by TTGE greatly improves the molecular diagnosis of Hispanic CF patients.

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133 Identification of rare and novel mutations and polymorphisms Base substitution Mutation Exon or intron Homozygote or heterozygote Polymorphism or mutation # Alleles identified 1 c.124_146del23bp Frameshift 1 Heterozygote Mutation 1 2 c.296+2T>A Splice Int 2 Heterozygote Mutation 1 3 c.296+28A/G Int 2 Homozygote Polymorphism 2 4 c.355CT p.R75X 3 Heterozygote Mutation 2 5 c.360_365insT Frameshift 3 Heterozygote Mutation 1 6 c.379_381insT Frameshift 3 Heterozygote Mutation 1 7 c.406-1G>A Splice Int 4 Heterozygote Mutation 2 8 c.424C.T p.Q98X 4 Heterozygote Mutation 1 9 c.425A.G p.Q98R 4 Heterozygote Mutation 3 10 c.586A.G p.M152V 4 Homozygote Mutation 2 11 c.663delT Frameshift 5 Heterozygote Mutation 3 12 c.667C>A p.Q179K 5 Heterozygote Mutation, 1 13 c.745C.T p.P205S 6a Heterozygote Mutation 5 14 c.875140A/G 6a Heterozygote Polymorphism 11 15 c.935delA Frameshift 6b Heterozygote Mutation 2 16 c.124811G.A Splice Int 7 Heterozygote Mutation 2 17 c.1285ins TA Frameshift 8 Heterozygote Mutation 4 Homozygote Mutation 2 18 c.1342+196C/T Int 8 Heterozygote Polymorphism 4 Homozygote 2 19 c.1461insAGAT Frameshift 9 Heterozygote Mutation 1 20 c.1525-61A/G 10 Heterozygote Polymorphism 22 21 c.1529C.A/G p.S466X 10 Heterozygote Mutation 1 22 c.1607C.T p.S492F 10 Heterozygote Mutation 3 23 c.1814C.T p.A561E 12 Heterozygote Mutation 1 24 c.189813A.G Splice Int 12 Heterozygote Mutation 1 25 c.18981152T/A Int 12 Heterozygote Polymorphism 5 26 c.1924del 7bp Frameshift 13 Heterozygote Mutation 1 27 c.1949del84 Frameshift 13 Heterozygote Mutation 1 28 c.2055del9toA Frameshift 13 Homozygote Mutation 2 29 c.2105_2117 Frameshift 13 Heterozygote Mutation 4 del13insAGAAA 30 c.2108delA Frameshift 13 Heterozygote Mutation 1 31 c.2184insA Frameshift 13 Heterozygote Mutation 2 32 c.2184delA Frameshift 13 Heterozygote Mutation 1 33 c.2289_2295 Frameshift 13 Heterozygote Mutation 1 del7insGT 34 c.2694T.G p.T854T 14a Heterozygote Polymorphism 10 35 c.2752+12G/C Int 14a Heterozygote Polymorphism 2 36 c.2800C.T p.Q890X 15 Homozygote Mutation 2 37 c.3171delC Frameshift 17a Heterozygote Mutation 1 38 c.3179T>C p.F1016S 17a Heterozygote Mutation 1 39 c.3199del 6bp Frameshift 17a Heterozygote Mutation 1 40 c.3212T.C p.I1027T 17a Heterozygote Mutation 1 41 c.3272-26A.G Splice Int17a Heterozygote Mutation 4 42 c.3271delGG Frameshift 17a Heterozygote Mutation 1 43 c.3313G.C p.G1061R 17b Heterozygote Mutation 1 44 c.3328C.T p.R1066C 17b Heterozygote Mutation 2 45 c.3362T.C p.L1077P 17b Heterozygote Mutation 1 46 c.3431A.C p.Q1100P 17b Heterozygote Mutation 1 47 c.3500-2A>T Splice Int 17b Heterozygote Mutation 1 48 c.3743G.A p.W1204X 19 Heterozygote Mutation 1 Homozygote Mutation 2 49 c.3601-65C/A Int 19 Heterozygote Polymorphism 14 50 c.3863G.A p.G1244E 20 Heterozygote Mutation 3 Table 3. Login to comment

[hide] Spectrum of CFTR mutations in cystic fibrosis and ... Hum Mutat. 2000;16(2):143-56. Claustres M, Guittard C, Bozon D, Chevalier F, Verlingue C, Ferec C, Girodon E, Cazeneuve C, Bienvenu T, Lalau G, Dumur V, Feldmann D, Bieth E, Blayau M, Clavel C, Creveaux I, Malinge MC, Monnier N, Malzac P, Mittre H, Chomel JC, Bonnefont JP, Iron A, Chery M, Georges MD
Spectrum of CFTR mutations in cystic fibrosis and in congenital absence of the vas deferens in France.
Hum Mutat. 2000;16(2):143-56., [PMID:10923036]

Abstract [show]
We have collated the results of cystic fibrosis (CF) mutation analysis conducted in 19 laboratories in France. We have analyzed 7, 420 CF alleles, demonstrating a total of 310 different mutations including 24 not reported previously, accounting for 93.56% of CF genes. The most common were F508del (67.18%; range 61-80), G542X (2.86%; range 1-6.7%), N1303K (2.10%; range 0.75-4.6%), and 1717-1G>A (1.31%; range 0-2.8%). Only 11 mutations had relative frequencies >0. 4%, 140 mutations were found on a small number of CF alleles (from 29 to two), and 154 were unique. These data show a clear geographical and/or ethnic variation in the distribution of the most common CF mutations. This spectrum of CF mutations, the largest ever reported in one country, has generated 481 different genotypes. We also investigated a cohort of 800 French men with congenital bilateral absence of the vas deferens (CBAVD) and identified a total of 137 different CFTR mutations. Screening for the most common CF defects in addition to assessment for IVS8-5T allowed us to detect two mutations in 47.63% and one in 24.63% of CBAVD patients. In a subset of 327 CBAVD men who were more extensively investigated through the scanning of coding/flanking sequences, 516 of 654 (78. 90%) alleles were identified, with 15.90% and 70.95% of patients carrying one or two mutations, respectively, and only 13.15% without any detectable CFTR abnormality. The distribution of genotypes, classified according to the expected effect of their mutations on CFTR protein, clearly differed between both populations. CF patients had two severe mutations (87.77%) or one severe and one mild/variable mutation (11.33%), whereas CBAVD men had either a severe and a mild/variable (87.89%) or two mild/variable (11.57%) mutations.

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109 h M1K, K14X, W19X, 211delG, G27E, R31C, 237insA, 241delAT, Q39X, 244delTA, 296+2T>C, 297-3C>T, W57X+F87L, 306delTAGA, P67L, A72D, 347delC, R75Q, 359insT, 394delT, 405+4A>G, Q98R, 457TAT>G, R117H+5T, R117H+I1027T, R117L, R117P, H139R, A141D, M152V, N186K, D192N, D192del, E193X, 711+1G>A, 711+3A>G, 712-1G>T, L206F, W216X, C225R, Q237E, G241R, 852del22, 876-14del12, 905delG, 993del5, E292K, Y304X, F311del, 1161delC, R347L, R352Q, W361R, 1215delG, S364P, S434X, D443Y, S466X, C491R, T501A, I506T, F508C, I507del+F508C, F508del+L467F, 1774delCT, R553G, 1802delC, 1806delA, A559E, Y563N, 1833delT, Y569C, Y569H, Y569X, G576X, G576A, T582I, 1898+3A>G+186-13C>G, 1918delGC, R600G, L610S, G628R, 2043delG, 2118del4, E664X, 2174insA, Q689X, K698R, K716X, L732X, 2347delG, 2372del8, R764X, 2423delG, S776X, 2634insT, 2640delT, C866Y, 2752-1G>T, W882X, Y913C, V920M, 2896insAG, H939D, H939R, D979V, D985H, D993Y, 3120G>A, I1005R, 3195del6, 3293delA, 3320ins5, W1063X, A1067T, 3359delCT, T1086I, W1089X, Y1092X+S1235R, W1098X, E1104X, R1128X, 3532AC>GTA, 3548TCAT>G, M1140del, 3600G>A, R1162L, 3667ins4, 3732delA+K1200E, S1206X, 3791delC, S1235R+5T, Q1238R, Q1238X, 3849+4A>G, T1246I, 3869insG, S1255P, R1283K, F1286S, 4005+1G>T, 4006-8T>A, 4015delA, N1303H, N1303I, 4172delGC, 4218insT, 4326delTC, Q1382X, 4375-1C>T, 4382delA, D1445N, CF40kbdel4-10, Cfdel17b. Login to comment