ABCD1 p.Leu576Pro
| Predicted by SNAP2: | A: N (53%), C: N (61%), D: D (80%), E: D (75%), F: D (59%), G: D (71%), H: D (71%), I: N (78%), K: D (80%), M: N (78%), N: D (75%), P: D (80%), Q: D (66%), R: D (80%), S: D (63%), T: D (66%), V: N (72%), W: D (71%), Y: D (66%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: N, K: D, M: N, N: D, P: D, Q: D, R: D, S: D, T: D, V: D, W: D, Y: D, |
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[hide] Molecular diagnosis of X-linked adrenoleukodystrop... Clin Chim Acta. 2011 May 12;412(11-12):970-4. Epub 2011 Feb 12. Lan F, Wang Z, Xie H, Huang L, Ke L, Yang B, Zhu Z
Molecular diagnosis of X-linked adrenoleukodystrophy: experience from a clinical genetic laboratory in mainland China with report of 13 novel mutations.
Clin Chim Acta. 2011 May 12;412(11-12):970-4. Epub 2011 Feb 12., [PMID:21300044]
Abstract [show]
BACKGROUND: X-linked adrenoleukodystrophy (X-ALD) is a neurodegenerative disorder characterized by progressive demyelination of the nervous system, adrenocortical insufficiency and increase of very long chain fatty acids (VLCFAs) in the plasma and tissues. METHODS: A total of 131 individuals from 30 Chinese pedigrees were involved in this study, including 42 symptomatic patients, 44 female carriers, and 15 high-risk fetuses from 13 families. The mutation was first pinpointed through long distance RT-PCR-based RNA approach and confirmed through peripheral blood DNA approach. RESULTS: A total of 28 mutations were identified, of which 19 were missense, 3 nonsense and 6 frame-shift mutations. Thirteen mutations were novel, i.e. p.R280L, p.P580L, p.G343V, p.S108X, p.R259W, p.P534R, p.fs A246, p.L576P, p.K602X, p.A314P, p.N148D, p.H283R, and p.fs R89. Two mutations occurred de novo, for they were not found in somatic cells of their parents. Three females from the same family developed AMN-like symptoms and they were heterozygous for the p.H283R mutation. Four asymptomatic boys were diagnosed as X-ALD patients and prenatal molecular diagnosis were provided for 13 X-ALD-stricken families. CONCLUSIONS: Our work extended the spectrum of mutations in X-ALD and benefited genetic counseling through reliable identification of heterozygous females and asymptomatic males.
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No. Sentence Comment
4 Thirteen mutations were novel, i.e. p.R280L, p.P580L, p.G343V, p.S108X, p.R259W, p.P534R, p.fs A246, p.L576P, p.K602X, p.A314P, p.N148D, p.H283R, and p.fs R89.
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ABCD1 p.Leu576Pro 21300044:4:103
status: NEW53 Thirteen mutations were novel, i.e. p.R280L, p.P580L, p.G343V, p.S108X, p.R259W, p.fs A246, p.L576P, p.P534R, p.K602X, p.A314P, p.N148D, p.H283R, and p.fs R89, 9 of which were missense mutations.
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ABCD1 p.Leu576Pro 21300044:53:94
status: NEW62 The p.L576P mutation in pedigree 12 was not found in the maternal grandmother of the patient, but was found in his mother.
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ABCD1 p.Leu576Pro 21300044:62:6
status: NEW99 Pedigree Number of patient Number of carriere Phenotype of patient Base change Amino acid change Position of mutation Feature of mutation Prenatal diagnosis 1 1 2 AdolCALD 1225GNT R280L Exon 1 Missense 2 1 1 CCALD 1909CNT P508L Exon 6 Missense 3 4 3 CCALD 1987CNG P534R Exon 6 Missense Y 4 1 1 CCALD 1182GNA G266R Exon 1 Missense 5 1a +1b 1 CCALD 2235CNG R617G Exon 8 Missense Y 6 1+1a +1c 1 CCALD 1414GNT G343V Exon 2 Missense 7 1 1 CCALD 1415_02 del AG fs E471 Exon 5 Frameshift 8 1+1b 1 CCALD 2235CNT R617C Exon 8 Missense Yh 9 1 1 CCALD 2065CNT P560L Exon 7 Y 10 1+1a 2+1b CCALD [709 NA; 1161CNT] [S108X; R259W] Exon 1 Nonsense; Missense Y 11 1 1 CCALD 1126ins GCCATCG fs I246 Exon 1 Frameshift 12 1 1 CCALD 2113TNC L576P Exon 7 Missense 13 1a +2c 3 CCALD 807GNA A141T Exon 1 Missense 14 1 1 CCALD 1415_02 del AG fs E471 Exon 5 Frameshift Y 15 1 1+1b CCALD 915CNA Q177X Exon 1 Nonsense Yh 16 1+1a 1 CCALD 1588GNA R401Q Exon 3 Missense 17 1 1 CCALD 1212 ANG K276E Exon 1 Missense Y 18 1 1 CCALD 907 ANG Y174C Exon 1 Missense 19 1 2 CCALD 2190 ANT K602X Exon 8 Nonsense 20 1 1 CCALD 1326GNC A314P Exon 2 Missense 21 1 1 CCALD 828 ANG N148D Exon 1 Missense Y 22 1 1 CCALD 1588GNA R401Q Exon 3 Missense Y 23 1 0f CCALD 2278GNA C631Y Exon 9 Missense 24 1a 1 CCALD 1008insG fs S207 Exon 1 Frameshift Y 25 1 0f CCALD 1920GNA G512S Exon 6 Missense 26 1+1c 3 CCALD 1415_02 del AG fs E471 Exon 5 Frameshift Y 27 1+1b 1 CCALD [1035ANG; 1853GNA] [K217E; V489V] Exon 1 Missense; same sense Y 28 1+3d 4 AMNg 1234ANG H283R Exon 1 Missense 29 1+2a 3 CCALD 1233CNG H283D Exon 1 Missense 30 2 3 AMN; CCALD 656_57 delGA fs R89 Exon 1 Frameshift a patient or proband died at the time of referral; b fetus by prenatal diagnosis; c presymptomatic at the time of referral; d female heterozygote patient; e determined by molecular ananlysis or deduced by the fact that the carrier was the daughter of an X-ALD, or the mother of at least one X-ALD patients; f de novo mutation; g including three heterozygote female patients; h twice for two pregnancies.
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ABCD1 p.Leu576Pro 21300044:99:720
status: NEW[hide] Preferential expression of mutant ABCD1 allele is ... Orphanet J Rare Dis. 2012 Jan 26;7:10. doi: 10.1186/1750-1172-7-10. Salsano E, Tabano S, Sirchia SM, Colapietro P, Castellotti B, Gellera C, Rimoldi M, Pensato V, Mariotti C, Pareyson D, Miozzo M, Uziel G
Preferential expression of mutant ABCD1 allele is common in adrenoleukodystrophy female carriers but unrelated to clinical symptoms.
Orphanet J Rare Dis. 2012 Jan 26;7:10. doi: 10.1186/1750-1172-7-10., [PMID:22280810]
Abstract [show]
BACKGROUND: Approximately 20% of adrenoleukodystrophy (X-ALD) female carriers may develop clinical manifestations, typically consisting of progressive spastic gait, sensory deficits and bladder dysfunctions. A skewing in X Chromosome Inactivation (XCI), leading to the preferential expression of the X chromosome carrying the mutant ABCD1 allele, has been proposed as a mechanism influencing X-linked adrenoleukodystrophy (X-ALD) carrier phenotype, but reported data so far are conflicting. METHODS: To shed light into this topic we assessed the XCI pattern in peripheral blood mononuclear cells (PBMCs) of 30 X-ALD carriers. Since a frequent problem with XCI studies is the underestimation of skewing due to an incomplete sample digestion by restriction enzymes, leading to variable results, we developed a pyrosequencing assay to identify samples completely digested, on which to perform the XCI assay. Pyrosequencing was also used to quantify ABCD1 allele-specific expression. Moreover, very long-chain fatty acid (VLCFA) levels were determined in the same patients. RESULTS: We found severely (>/=90:10) or moderately (>/=75:25) skewed XCI in 23 out of 30 (77%) X-ALD carriers and proved that preferential XCI is mainly associated with the preferential expression of the mutant ABCD1 allele, irrespective of the manifestation of symptoms. The expression of mutant ABCD1 allele also correlates with plasma VLCFA concentrations. CONCLUSIONS: Our results indicate that preferential XCI leads to the favored expression of the mutant ABCD1 allele. This emerges as a general phenomenon in X-ALD carriers not related to the presence of symptoms. Our data support the postulated growth advantage of cells with the preferential expression of the mutant ABCD1 allele, but argue against the use of XCI pattern, ABCD1 allele-specific expression pattern and VLCFA plasma concentration as biomarkers to predict the development of symptoms in X-ALD carriers.
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No. Sentence Comment
53 All samples were tested in Table 1 Clinical Findings, Genotype, X-Chromosome Inactivation (XCI), ABCD1 Allele-Specific Expression (ASE) and Biochemical Findings (VLCFA plasma levels) of X-ALD carriers Nr of family, consultants Age (yrs) Presence of symptoms (age at onset, yrs) Mutations XCI pattern ABCD1 ASE (mut:wt) C26 (nv) C26/C22 (nv) C24/C22 (nv) F1 II-3 67 Yes (45) 410G > A W137X 97:03 84:16 1,09 (<0,75) 48 (<17) 1644 (<1100) F1 III-2 34 No 410G > A W137X 91:09 nd 0,58 (<0,75) 47 (<17) 1482 (<1100) F2 I-2 61 Yes (59) 427C > G P143A 71:29 93:07 0,85 (<0,75) 18 (<17) 1222 (<1100) F2 II-1 38 No 427C > G P143A 85:15 83:17 nd nd nd F2 II-2 35 No 427C > G P143A 76:24 77:23 nd nd nd F3 II-2 73 Yes (45) 428C > A P143H 60:40 38:62 1,45 (<1,50) 28 (<40) 700 (<820) F3 III.1 46 No 428C > A P143H 84:16 84:16 1,53 (<1,50) 40 (<40) 860 (<820) F3 III-2 50 No 428C > A P143H 83:17 75:25 1,75 (<1,50) 37 (<40) 733 (<820) F4 II-3 75 Yes (50) 652C > T; 664G > T P218S; V222L 81:19 82:18 1,57 (<0,75) 19 (<17) 1680 (<1100) F4 III-1 44 No 652C > T; 664G > T P218S; V222L 83:17 81:19 2,38 (<1,50) 53 (<40) 1424 (<820) F4 III-3 45 Yes (29) 652C > T; 664G > T P218S; V222L 89:11 82:18 1,00 (<0,75) 36 (<17) 1611 (<1100) F5 II-1 55 Yes (54) 1202G > A R401Q 98:02 82:18 1,96 (<1,50) 38 (<40) 1031 (<820) F6 II-1 76 Yes (58) 1727T > C L576P 73:27 76:24 2,10 (<0,75) 21 (<17) 1039 (<1100) F7 I-2 72 No 1772G > A R591Q n/a n/a 1,23 (<1,5) 16 (<40) 798 (<820) F7 II-1 44 Yes (34) 1772G > A R591Q 96:04 97:03 2,7 (<1,50) 56 (<40) 957 (<820) F8 II-1 62 Yes (40) 1992G > A W664X 83:17 82:18 3,08 (<1,50) 56 (<40) 1132 (<820) F9 II-1 63 No 293C > T S98L 83:17 93:07 1,82 (<1,50) 37 (<40) 888 (<820) F9 II-3 57 No 293C > T S98L 79:21 75:25 1,99 (<1,50) 42 (<40) 913 (<820) F9 III-2 20 No 293C > T S98L 75:25 61:39 2,65 (<1,50) 46 (<40) 1149 (<820) F10 I-2 63 No 443A > G N148S 86:14 42:58 2,16 (<1,50) 42 (<40) 788 (<820) F10 II-2 40 No 443A > G N148S 96:04 84:16 2,17 (<1,50) 43 (<40) 757 (<820) F11 III-1 67 No 1165C > T R389C 52:48 72:28 0,7 (<1,50) 13 (<40) 572 (<820) F11 III-3 64 No 1165C > T R389C 78:22 34:66 1,1 (<1,50) 16 (<40) 823 (<820) F11 III-5 49 No 1165C > T R389C 98:02 20:80 1,05 (<1,50) 16 (<40) 848 (<820) F11 III-6 46 No 1165C > T R389C 71:29 74:26 1,30 (<1,50) 18 (<40) 1000 (<820) F11 V-1 26 No 1165C > T R389C 57:43 58:42 0,68 (<1,50) 14 (<40) 663 (<820) F12 I-2 53 No 1211C > A S404X 95:05 09:91 nd nd nd F13 I-2 60 No del. ex8-10 n/a 76:24 nd nd nd nd duplicate and one male DNA sample was included in each experiment as a control for enzymatic digestion.
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ABCD1 p.Leu576Pro 22280810:53:1326
status: NEW