ABCD1 p.Ser633Ile
| Predicted by SNAP2: | A: D (91%), C: D (95%), D: D (95%), E: D (95%), F: D (95%), G: D (95%), H: D (95%), I: D (95%), K: D (95%), L: D (95%), M: D (95%), N: D (91%), P: D (95%), Q: D (95%), R: D (95%), T: D (95%), V: D (95%), W: D (95%), Y: D (95%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: D, K: D, L: D, M: D, N: D, P: D, Q: D, R: D, T: D, V: D, W: D, Y: D, |
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[hide] X-linked adrenoleukodystrophy: ABCD1 de novo mutat... Mol Genet Metab. 2011 Sep-Oct;104(1-2):160-6. Epub 2011 Jun 22. Wang Y, Busin R, Reeves C, Bezman L, Raymond G, Toomer CJ, Watkins PA, Snowden A, Moser A, Naidu S, Bibat G, Hewson S, Tam K, Clarke JT, Charnas L, Stetten G, Karczeski B, Cutting G, Steinberg S
X-linked adrenoleukodystrophy: ABCD1 de novo mutations and mosaicism.
Mol Genet Metab. 2011 Sep-Oct;104(1-2):160-6. Epub 2011 Jun 22., [PMID:21700483]
Abstract [show]
X-linked adrenoleukodystrophy (X-ALD) is a progressive peroxisomal disorder affecting adrenal glands, testes and myelin stability that is caused by mutations in the ABCD1 (NM_000033) gene. Males with X-ALD may be diagnosed by the demonstration of elevated very long chain fatty acid (VLCFA) levels in plasma. In contrast, only 80% of female carriers have elevated plasma VLCFA; therefore targeted mutation analysis is the most effective means for carrier detection. Amongst 489 X-ALD families tested at Kennedy Krieger Institute, we identified 20 cases in which the ABCD1 mutation was de novo in the index case, indicating that the mutation arose in the maternal germ line and supporting a new mutation rate of at least 4.1% for this group. In addition, we identified 10 cases in which a de novo mutation arose in the mother or the grandmother of the index case. In two of these cases studies indicated that the mothers were low level gonosomal mosaics. In a third case biochemical, molecular and pedigree analysis indicated the mother was a gonadal mosaic. To the best of our knowledge mosaicism has not been previously reported in X-ALD. In addition, we identified one pedigree in which the maternal grandfather was mosaic for the familial ABCD1 mutation. Less than 1% of our patient population had evidence of gonadal or gonosomal mosaicism, suggesting it is a rare occurrence for this gene and its associated disorders. However, the residual maternal risk for having additional ovum carrying the mutant allele identified in an index case that appears to have a de novo mutation is at least 13%.
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No. Sentence Comment
85 The c.1899CNA transversion has been reported in one other family [19], and another amino acid substitution, p.Ser633Ile, also has been reported in another family [20].
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ABCD1 p.Ser633Ile 21700483:85:110
status: NEW[hide] Eight novel ABCD1 gene mutations and three polymor... Hum Mutat. 2001;18(1):52-60. Dvorakova L, Storkanova G, Unterrainer G, Hujova J, Kmoch S, Zeman J, Hrebicek M, Berger J
Eight novel ABCD1 gene mutations and three polymorphisms in patients with X-linked adrenoleukodystrophy: The first polymorphism causing an amino acid exchange.
Hum Mutat. 2001;18(1):52-60., [PMID:11438993]
Abstract [show]
X-ALD is a neurological disorder associated with inherited defects in the ABCD1 (ALD) gene located on Xq28 and with impaired peroxisomal very long-chain fatty acid beta-oxidation. We examined the ABCD1 gene in probands from 11 unrelated X-ALD Czech and Slovak families by the direct sequencing of cDNA or genomic PCR products. In 10 families there were 10 different mutations, eight of which were novel. The spectrum of mutations consists of six point mutations, three microdeletions (1bp, 2bp, 4 bp), and one large deletion (229bp). In the 11th family we detected two novel single-base pair substitutions in exon 1 (c.38 A>C and c.649 A>G), both causing amino acid exchanges (N13T and K217E). Expression studies revealed that only K217E is a deleterious mutation, because a plasmid encoding ALDP with K217E was ineffective in the restoration of defective beta-oxidation in X-ALD fibroblasts. The N13T amino acid exchange, on the other hand, did not affect ALDP function. Thus, N13T represents the first polymorphism causing an amino acid exchange in the ABCD1 gene. As this polymorphism was observed neither in 100 control alleles nor in 300 X-ALD patients who have been sequenced so far world-wide, it seems to be very rare or unique. Two additional novel polymorphisms were found by the sequencing of the ABCD1 gene from our patients: c.-59 C/T in the 5'untranslated region and c.2019 C/T (F673F) in exon 10. The frequencies of these two polymorphisms, were 11/150 and 2/150 control alleles, respectively.
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No. Sentence Comment
46 Phenotype (years) Therapy Exon (ATG=1) Allele residues site Polymorphisms 1 1 ccALD 15 None 1 c.97-100 Fs V32 +BsmFI c.2246 G>C del/TACC 2 2 ccALD 6 LO, GTO, BMT 1+IVS1 g.697-925/del 3 3 AMN 33 LO, GTO 3 c.1092/del/C Fs E363 -BsuRI 4 4 ccALD Died at None 5 c.1415-1416/del Fs E471 +TaaIe the age of 9 AGf 5 5 AMN 20 LO, GTO 1 c.293 C>Tg S98L TMS 1c -Eco52I c.2019 C>T c.2246 G>C 6 6 AMN 18 LO, GTO 1 c.296 C>A A99D TMS 1 +BsaHI c.1548 G>A c.2246 G>C 7 7a ADO 14 LO, GTO 1 c.649 A>G K217E TMS 3 +AvaIe c.38 A>C 7 7b ADO 9 LO, GTO 1 c.649 A>G K217E TMS 3 +AvaIe c.38 A>C 8 8 AMN 22 LO, GTO 6 c.1553 G>Ah R518Q Walker Ad +PflMI 9 9 ccALD 17b LO, GTO 8 c.1823 G>A G608D C sequenced +HphI c.-59 C>T c.1548 G>A c.2246 G>C 10 10 Asymptomatic 9 LO,GTO 9 c.1898 G>T S633I Conserved in mouse +MslI 11 11 ccALD 9 None 9 c.1979 G>C R660P Conserved in mouse -Cfr10I a Novel variants in boldface type.
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ABCD1 p.Ser633Ile 11438993:46:757
status: NEW