ABCA4 p.Val643Gly
| ClinVar: |
c.1927G>A
,
p.Val643Met
N
, Benign
c.1928T>G , p.Val643Gly ? , not provided |
| Predicted by SNAP2: | A: N (66%), C: N (72%), D: D (66%), E: N (61%), F: D (91%), G: D (91%), H: N (61%), I: D (66%), K: N (53%), L: N (87%), M: D (85%), N: N (57%), P: N (53%), Q: N (61%), R: N (53%), S: N (61%), T: N (78%), W: D (71%), Y: N (53%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: N, K: D, L: N, M: N, N: D, P: D, Q: D, R: D, S: D, T: D, W: D, Y: D, |
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[hide] A subgroup of age-related macular degeneration is ... Invest Ophthalmol Vis Sci. 2012 Apr 30;53(4):2112-8. doi: 10.1167/iovs.11-8785. Print 2012 Apr. Fritsche LG, Fleckenstein M, Fiebig BS, Schmitz-Valckenberg S, Bindewald-Wittich A, Keilhauer CN, Renner AB, Mackensen F, Mossner A, Pauleikhoff D, Adrion C, Mansmann U, Scholl HP, Holz FG, Weber BH
A subgroup of age-related macular degeneration is associated with mono-allelic sequence variants in the ABCA4 gene.
Invest Ophthalmol Vis Sci. 2012 Apr 30;53(4):2112-8. doi: 10.1167/iovs.11-8785. Print 2012 Apr., [PMID:22427542]
Abstract [show]
Purpose. Age-related macular degeneration (AMD) is a heterogeneous condition of high prevalence and complex etiology involving genetic as well as environmental factors. By fundus autofluorescence (FAF) imaging, AMD can be classified into several distinct phenotypes, with one subgroup characterized by fine granular pattern with peripheral punctate spots (GPS[+]). Some features of GPS[+] overlap with Stargardt disease (STGD1), a recessive macular dystrophy caused by biallelic sequence variants in the ATP-binding cassette transporter 4 (ABCA4) gene. The aim of this study was to investigate the role of ABCA4 in GPS[+]. Methods. The ABCA4 gene was sequenced in 25 patients with the GPS[+] phenotype and 29 with geographic atrophy (GA)-AMD but no signs of GPS (GPS[-]). In addition, frequencies of risk-increasing alleles at three known AMD susceptibility loci, including complement factor H (CFH), age-related maculopathy susceptibility 2 (ARMS2), and complement component 3 (C3), were evaluated. Results. We demonstrate that GPS[+] is associated significantly with monoallelic ABCA4 sequence variants. Moreover, frequencies of AMD risk-increasing alleles at CFH, ARMS2, and C3 are similar in GPS[+] and STGD1 patients, with risk allele frequencies in both subcategories comparable to population-based control individuals estimated from 3,510 individuals from the NHLBI Exome Sequencing Project. Conclusions. Our data suggest that the GPS[+] phenotype is accounted for by monoallelic variants in ABCA4 and unlikely by the well-established AMD risk-increasing alleles at CFH, ARMS2, and C3. These findings provide support for a complex role of ABCA4 in the etiology of a minor proportion of patients with AMD.
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88 The patient carries a heterozygous, complex disease allele (c.1622T>C, p.L541P; c.3113C>T, p.A1038V) in the ABCA4 gene.
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ABCA4 p.Val643Gly 22427542:88:159
status: NEW90 Due to lack of DNA from further family members, segregation of variants c.3113C>T (p.A1038V) / c.3752delA (p.Glu1251fs) and c.1804C>T (p.R602W) / c.1928T>G (p.V643G) could not be assessed further (Supplementary Table S5).
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ABCA4 p.Val643Gly 22427542:90:159
status: NEW[hide] Lipofuscin- and melanin-related fundus autofluores... Am J Ophthalmol. 2009 May;147(5):895-902, 902.e1. Epub 2009 Feb 25. Kellner S, Kellner U, Weber BH, Fiebig B, Weinitz S, Ruether K
Lipofuscin- and melanin-related fundus autofluorescence in patients with ABCA4-associated retinal dystrophies.
Am J Ophthalmol. 2009 May;147(5):895-902, 902.e1. Epub 2009 Feb 25., [PMID:19243736]
Abstract [show]
PURPOSE: To compare melanin-related near-infrared fundus autofluorescence (NIA; excitation 787 nm, emission > 800 nm) to lipofuscin-related fundus autofluorescence (FAF; excitation 488 nm, emission > 500 nm) in patients with retinal dystrophies associated with ABCA4 gene mutations (ABCA4-RD). DESIGN: Observational case series. METHODS: Sixteen consecutive patients with ABCA4-RD diagnosed in one institution were included. FAF and NIA imaging were performed with a confocal scanning laser ophthalmoscope (Heidelberg Retina Angiograph 2; Heidelberg Engineering, Heidelberg, Germany). The pattern and size of retinal pigment epithelial (RPE) alterations detected with FAF and NIA were evaluated. RESULTS: FAF and NIA alterations were detected in all patients. In 7 of 16 patients, the alterations progressed beyond the vascular arcades, and in 9 of 16, they were confined to the macula. Spots of increased NIA (4/16) were less frequent compared with spots of increased FAF (15/16). Confluent patches of reduced NIA were frequent (12/16), and severely reduced NIA was observed in 3 cases. Areas with reduced NIA corresponded to either increased or reduced FAF. Preservation of subfoveal FAF or NIA corresponded to visual acuity > or = 0.4. Abnormalities detected with NIA were more extensive or more severe compared to FAF in 15 of 16 patients. CONCLUSION: Patterns of FAF and NIA indicate different involvement of lipofuscin and melanin and their derivates in the pathophysiologic process of ABCA4-RD. NIA imaging provides a noninvasive in vivo visualization of RPE abnormalities that may precede FAF alterations during the degenerative process. Combined FAF and NIA imaging will provide further insight in the development of ABCA4-RD and could help to monitor future therapeutic interventions.
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32 Age Gender ABCA4 Mutation VA RE/LE Full-field ERG Multifocal ERG Group 1a CRD 2808 34 F c.5413AϾG (p.Asn1805Asp) c.4880_4903dup24 (p.Leu1627_Ala1634dup) 0.05 0.05 DA and LA markedly reduced No recordable potentials CRD 2830 53 F c.2690CϾT (p.Thr897Ile), c.6176GϾC (p.Gly2059Ala) 0.5 0.7 DA and LA moderately reduced Pericentral amplitude reduction CRD 2797 54 M c.4297GϾA (p.Val1433Ile) 2. mutation not foundc 0.1 0.16 DA and LA moderately reduced Not done SD 2872 44 F c.4462TϾC (p.Cys1488Arg) 2. mutation not done 0.6 0.7 DA and LA borderline Central amplitude reduction CRD 2861 72 F c.122GϾA (p.Trp41Ter) 2. mutation not done 0.4 0.5 DA: mildly and LA: moderately reduced Central amplitude reduction CRD 2644 67 F c.634CϾT (p.Arg212Cys), c.656GϾC (p.Arg219Thr), c.2588GϾC (p.Gly863Ala/ delGly863) 0.6 0.04 DA and LA moderately reduced Central amplitude reduction CRD 2936 44 F c.1622TϾC (p.Leu541Pro)/ c.3113CϾT (p.Ala1038Val), 2. mutation not done 1.0 1.0 DA: mildly and LA: moderately reduced Pericentral amplitude reduction Group 2b SD 2837 42 M c.1622TϾC (p.Leu541Pro)/ c.3113CϾT (p.Ala1038Val), c.5882GϾA (p.Gly1961Glu) 0.16 0.16 Normal Central amplitude reduction SD 2780 37 M c.768GϾT (splice mutation) c.5882GϾA (p.Gly1961Glu) 0.1 0.1 Normal Central amplitude reduction SD 2942 47 F c.1622TϾC (p.Leu541Pro) c.6320 GϾA (p.Arg2107His) 0.1 0.16 Not done Central amplitude reduction SD 2930 40 F c.6089GϾA (p.Arg2030Gln) c.6543del36bp, (p.Leu2182_Phe2193del) 0.1 0.1 DA and LA mildly reduced Central amplitude reduction SD 2933 43 F c.1609CϾT (p.Arg537Cys) c.5882GϾA (p.Gly1961Glu) c.1654GϾA (p.Val552Ile) 0.05 0.1 Normal Not done SD 2669 13 F c.768GϾT (splice mutation) c.6449GϾA (p.Cys2150Tyr) 0.1 0.16 DA and LA borderline Central amplitude reduction SD 2700 22 F c.1609CϾT (p.Arg537Cys) c.2588GϾC (p.Gly863Ala) 0.1 0.1 Normal Central amplitude reduction SD 2833 29 M c.1928TϾG (p.Val643Gly) 2. mutation not foundc 0.1 0.1 Normal Not done SD 2799 13 M c.3113CϾT (p.Ala1038Val) c.5461-10TϾC 0.4 0.4 Not done Central amplitude reduction CRD ϭ cone-rod dystrophy; DA ϭ dark adaptation; ERG ϭ electroretinography; F ϭ female; LA ϭ light adaptation; LE ϭ left eye; M ϭ male; RE ϭ right eye; SD ϭ Stargardt disease; VA ϭ visual acuity.
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ABCA4 p.Val643Gly 19243736:32:2054
status: NEWX
ABCA4 p.Val643Gly 19243736:32:2168
status: NEW[hide] ABCA4 mutations in Portuguese Stargardt patients: ... Mol Vis. 2009;15:584-91. Epub 2009 Mar 25. Maia-Lopes S, Aguirre-Lamban J, Castelo-Branco M, Riveiro-Alvarez R, Ayuso C, Silva ED
ABCA4 mutations in Portuguese Stargardt patients: identification of new mutations and their phenotypic analysis.
Mol Vis. 2009;15:584-91. Epub 2009 Mar 25., [PMID:19365591]
Abstract [show]
PURPOSE: To resolve the spectrum of causative retina-specific ATP-binding cassette transporter gene (ABCA4) gene mutations in Portuguese Stargardt (STGD) patients and compare allele frequencies obtained in this cohort with those of previous population surveys. METHODS: Using a microarray technique (ABCR400 gene chip), we screened all previously reported ABCA4 gene mutations in the genomic DNA of 27 patients from 21 unrelated Stargardt families whose phenotypes had been clinically evaluated using psychophysics and electrophysiological measurements. Furthermore, we performed denaturing high performance liquid chromatography whenever one or both mutant alleles failed to be detected using the ABCR gene chip. RESULTS: A total of 36 mutant alleles (out of the 54 tested) were identified in STGD patients, resulting in a detection rate of 67%. Two mutant alleles were present in 12 out of 21 STGD families (57%), whereas in four out of 21 (19%) of the families, only one mutant allele was found. We report the presence of 22 putative pathogenic alterations, including two sequence changes not found in other populations, c.2T>C (p.Met1Thr) and c.4036_4037delAC (p.Thr1346fs), and two novel disease-associated variants, c.400C>T (p.Gln134X) and c.4720G>T (p.Glu1574X). The great majority of the mutations were missense (72.7%). Seven frameshift variants (19.4%), three nonsense mutations (8.3%), and one splicing sequence change (2.7%) were also found in STGD chromosomes. The most prevalent pathologic variant was the missense mutation p.Leu11Pro. Present in 19% of the families, this mutation represents a quite high prevalence in comparison to other European populations. In addition, 23 polymorphisms were also identified, including four novel intronic sequence variants. CONCLUSIONS: To our knowledge, this study represents the first report of ABCA4 mutations in Portuguese STGD patients and provides further evidence of different mutation frequency across populations. Phenotypic characterization of novel putative mutations was addressed.
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72 (Ser1642Arg [10])+(Val1681_Cys1685del [10])/ p.Leu11Pro 12 4796 Mo 43 1/10 / 3/10 c.4720G>T(33) / c.2791G>A(19) p.Glu1574X/p.Val931Met [5] 13 4859 Mo 30 0.5/10 / 0.5/10 c.5882G>A(42) / ND p.Gly1961Glu/ND 5472 Mo 30 6/10 / 8/10 c.5882G>A(42) / ND p.Gly1961Glu/ND 14 4974 S 7 1/10 / 1/10 c.4036_4037delAC(27) / c.400C>T(4) p.Thr1346fs/p.Gln134X 4975 S 7 1/10 / 1/10 c.
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ABCA4 p.Val643Gly 19365591:72:185
status: NEW73 4036_4037delAC(27) / c.400C>T(4) p.Thr1346fs/p.Gln134X 15 5193 Mo 9 1/10 / 1/10 ND / ND ND/ND 16 5138 Mo 27 1/10 / 1/10 ND / ND ND/ND 17 5111 Mo 29 2.5/10 / 1.6/10 c.1928T>G(13) / ND p.Val643Gly/ND 5137 Mo 25 3/10 / FC ND / c.32T>C(1) ND/p.Leu11Pro 18 5709 Mi 9 2/10 / 2/10 c.32T>C(1) / c.1804C<T(13) p.Leu11Pro/p.Arg602Thr [9] 19 5434 Mo 17 2/10 / 2/10 c.
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ABCA4 p.Val643Gly 19365591:73:185
status: NEW[hide] ABCA4 gene analysis in patients with autosomal rec... Eur J Hum Genet. 2008 Jul;16(7):812-9. Epub 2008 Feb 20. Kitiratschky VB, Grau T, Bernd A, Zrenner E, Jagle H, Renner AB, Kellner U, Rudolph G, Jacobson SG, Cideciyan AV, Schaich S, Kohl S, Wissinger B
ABCA4 gene analysis in patients with autosomal recessive cone and cone rod dystrophies.
Eur J Hum Genet. 2008 Jul;16(7):812-9. Epub 2008 Feb 20., [PMID:18285826]
Abstract [show]
The ATP-binding cassette (ABC) transporters constitute a family of large membrane proteins, which transport a variety of substrates across membranes. The ABCA4 protein is expressed in photoreceptors and possibly functions as a transporter for N-retinylidene-phosphatidylethanolamine (N-retinylidene-PE), the Schiff base adduct of all-trans-retinal with PE. Mutations in the ABCA4 gene have been initially associated with autosomal recessive Stargardt disease. Subsequent studies have shown that mutations in ABCA4 can also cause a variety of other retinal dystrophies including cone rod dystrophy and retinitis pigmentosa. To determine the prevalence and mutation spectrum of ABCA4 gene mutations in non-Stargardt phenotypes, we have screened 64 unrelated patients with autosomal recessive cone (arCD) and cone rod dystrophy (arCRD) applying the Asper Ophthalmics ABCR400 microarray followed by DNA sequencing of all coding exons of the ABCA4 gene in subjects with single heterozygous mutations. Disease-associated ABCA4 alleles were identified in 20 of 64 patients with arCD or arCRD. In four of 64 patients (6%) only one mutant ABCA4 allele was detected and in 16 patients (25%), mutations on both ABCA4 alleles were identified. Based on these data we estimate a prevalence of 31% for ABCA4 mutations in arCD and arCRD, supporting the concept that the ABCA4 gene is a major locus for various types of degenerative retinal diseases with abnormalities in cone or both cone and rod function.
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70 of alleles Reference Missense: 6 c.731T4Ca p.L244P 2 23 12 c.1622T4Cb p.L541P 1 5 13 c.1928T4G p.V643G 1 9 17 c.2588G4C p.G863A and p.G863del 2 4 21 c.3113C4Tb p.A1038V 1 4 25 c.3608G4A p.G1203E 1 24 28 c.4139C4T p.P1380L 2 25 30 c.4457C4T p.P1486L 1 25 30 c.4462T4C p.C1488R 1 25 37 c.5285C4A p.A1762D 1 24 41 c.5819T4C p.L1940P 1 26 42 c.5882G4A p.G1961E 1 9 45 c.6148G4C p.V2050L 1 25 45 c.6229C4T p.R2077W 1 25 Nonsense: 6 c.700C4T p.Q234X 1 This study 6 c.735T4G p.Y245X 2 24 28 c.4234C4T p.Q1412X 1 10 Deletion: 24 c.3539_3554del p.S1181PfsX8 1 This study 43 c.5917delG p.V1973X 3 27 Splice site/intronic: 26 c.5196+1G4A Splicing 1 9 34 c.4848+2T4C Splicing 1 This study 36 c.5196+1_5196+4del Splicing 1 15 39 c.5461À10T4C Unknown 8 14 40 c.5714+5G4A Splicing?
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ABCA4 p.Val643Gly 18285826:70:97
status: NEW[hide] Mutation of the Stargardt disease gene (ABCR) in a... Science. 1997 Sep 19;277(5333):1805-7. Allikmets R, Shroyer NF, Singh N, Seddon JM, Lewis RA, Bernstein PS, Peiffer A, Zabriskie NA, Li Y, Hutchinson A, Dean M, Lupski JR, Leppert M
Mutation of the Stargardt disease gene (ABCR) in age-related macular degeneration.
Science. 1997 Sep 19;277(5333):1805-7., [PMID:9295268]
Abstract [show]
Age-related macular degeneration (AMD) is the leading cause of severe central visual impairment among the elderly and is associated both with environmental factors such as smoking and with genetic factors. Here, 167 unrelated AMD patients were screened for alterations in ABCR, a gene that encodes a retinal rod photoreceptor protein and is defective in Stargardt disease, a common hereditary form of macular dystrophy. Thirteen different AMD-associated alterations, both deletions and amino acid substitutions, were found in one allele of ABCR in 26 patients (16%). Identification of ABCR alterations will permit presymptomatic testing of high-risk individuals and may lead to earlier diagnosis of AMD and to new strategies for prevention and therapy.
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110 Alteration AMD STGD1 General population V643G 1/167 (0.6%) 0/98 (0%) 1/80 (1.25%) D846H 0/167 (0%) 1/98 (1%) 1/50 (2%) G863A 1/167 (0.6%) 13/150 (8.7%) 2/220 (0.9%) R943Q 6/127 (4.7%) 4/47 (9.5%) 13/80 (16.25%) S2255I 24/167 (14.4%) 8/98 (8%) 6/58 (10.3%) SCIENCE ⅐ VOL.
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ABCA4 p.Val643Gly 9295268:110:40
status: NEW107 Alteration AMD STGD1 General population V643G 1/167 (0.6%) 0/98 (0%) 1/80 (1.25%) D846H 0/167 (0%) 1/98 (1%) 1/50 (2%) G863A 1/167 (0.6%) 13/150 (8.7%) 2/220 (0.9%) R943Q 6/127 (4.7%) 4/47 (9.5%) 13/80 (16.25%) S2255I 24/167 (14.4%) 8/98 (8%) 6/58 (10.3%) SCIENCE z VOL. 277 z 19 SEPTEMBER 1997 z www.sciencemag.org which map primarily to the highly conserved ATP-binding regions of the ABCR protein, AMD alterations were found outside these domains (Fig. 1).
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ABCA4 p.Val643Gly 9295268:107:40
status: NEW[hide] Foveal sparing in Stargardt disease. Invest Ophthalmol Vis Sci. 2014 Oct 16;55(11):7467-78. doi: 10.1167/iovs.13-13825. van Huet RA, Bax NM, Westeneng-Van Haaften SC, Muhamad M, Zonneveld-Vrieling MN, Hoefsloot LH, Cremers FP, Boon CJ, Klevering BJ, Hoyng CB
Foveal sparing in Stargardt disease.
Invest Ophthalmol Vis Sci. 2014 Oct 16;55(11):7467-78. doi: 10.1167/iovs.13-13825., [PMID:25324290]
Abstract [show]
PURPOSE: To provide a clinical and genetic description of a patient cohort with Stargardt disease (STGD1) with identifiable foveal sparing. METHODS: Patients with retinal atrophy (defined as an absence of autofluorescence) that surrounded the fovea by at least 180 degrees and did not include the fovea were defined as having foveal sparing; eyes with visual acuity (VA) worse than 20/200 were excluded. We reviewed the medical files and extracted data regarding medical history, VA, ophthalmoscopy, static perimetry, fundus photography, spectral-domain optical coherence tomography (SD-OCT), fluorescein angiography (FA), fundus autofluorescence (FAF), and electroretinography (ERG). We screened each patient's ABCA4 gene for mutations. RESULTS: Seventeen eyes with foveal sparing were identified in 13 unrelated patients. In 4 eyes, the fovea gradually became atrophic after the initial foveal sparing. The mean age at onset was 51 years (range, 32-67 years). Visual acuity was 20/40 or better in all foveal sparing eyes and was 20/25 or better in 41%. Fundus autofluorescence imaging revealed hyperautofluorescent flecks and parafoveal retinal atrophy; SD-OCT revealed sharply delineated atrophy; and perimetry revealed parafoveal scotomas with intact foveal sensitivity. Finally, genetic screening identified mutations in 19 of the 26 ABCA4 gene alleles. CONCLUSIONS: Foveal sparing occurs mainly in patients with late-onset STGD1 and represents the milder end of the clinical spectrum in STGD1. The anatomy, metabolism, and biochemistry of the retina, as well as genetic variations in genes other than ABCA4, can influence the etiology of foveal sparing. Identifying these fovea-protecting factors will facilitate the future development of strategies designed to treat STGD1.
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114 ABCA4 Mutations in STGD1 Patients With Foveal Sparing Allele 1 Allele 2 References DNA Variant Effect DNA Variant Effect P1 c.5461-10TC Unknown NI NA 35, 36 P2 c.3113CT p.Ala1038Val c.3874CT p.Gln1292* 16, 37, 38, 58 P3 c.5461-10TC Unknown c.5537TC p.Ile1846Thr 23, 35, 39, 58 P4 c.4363TC p.Cys1455Arg NI NA 40 P5 c.1822TA p.Phe608Ile c.4685TC p.Ile1562Thr 23, 40, 41, 59 P6 c.768GT Splice defect c.3113CT p.Ala1038Val 16, 23, 37 P7 c.5196&#fe;1GT Splice defect NI NA 45, 58 P8 c.3874CT p.Gln1292* NI NA 38 P9 c.5461-10TC Unknown NI NA 35, 58 P10 c.1822TA p.Phe608Ile NI NA 23, 41 P11 c.286AG p.Asn96Asp NI NA 43 P12 c.1805GA p.Arg602Gln c.4462TC p.Cys1488Arg 37, 39, 42-44 P13 c.3874CT p.Gln1292* c.1928TG p.Val643Gly 38, 45 NI, not identified; NA, not applicable.
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ABCA4 p.Val643Gly 25324290:114:728
status: NEW151 ABCA4 Mutations in STGD1 Patients With Foveal Sparing Allele 1 Allele 2 References DNA Variant Effect DNA Variant Effect P1 c.5461-10TC Unknown NI NA 35, 36 P2 c.3113CT p.Ala1038Val c.3874CT p.Gln1292* 16, 37, 38, 58 P3 c.5461-10TC Unknown c.5537TC p.Ile1846Thr 23, 35, 39, 58 P4 c.4363TC p.Cys1455Arg NI NA 40 P5 c.1822TA p.Phe608Ile c.4685TC p.Ile1562Thr 23, 40, 41, 59 P6 c.768GT Splice defect c.3113CT p.Ala1038Val 16, 23, 37 P7 c.5196&#fe;1GT Splice defect NI NA 45, 58 P8 c.3874CT p.Gln1292* NI NA 38 P9 c.5461-10TC Unknown NI NA 35, 58 P10 c.1822TA p.Phe608Ile NI NA 23, 41 P11 c.286AG p.Asn96Asp NI NA 43 P12 c.1805GA p.Arg602Gln c.4462TC p.Cys1488Arg 37, 39, 42-44 P13 c.3874CT p.Gln1292* c.1928TG p.Val643Gly 38, 45 NI, not identified; NA, not applicable.
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ABCA4 p.Val643Gly 25324290:151:728
status: NEW