ABCMdb

ABCD1 p.Arg104His

Predicted by SNAP2:	A: D (95%), 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 (95%), P: D (95%), Q: D (95%), S: 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, S: D, T: D, V: D, W: D, Y: D,

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[hide] Identification of new mutations in Israeli patient... Genet Test. 2001 Spring;5(1):65-8. Neumann S, Topper A, Mandel H, Shapira I, Golan O, Gazit E, Loewenthal R
Identification of new mutations in Israeli patients with X-linked adrenoleukodystrophy.
Genet Test. 2001 Spring;5(1):65-8., [PMID:11336405]

Abstract [show]
X-linked adrenoleukodystrophy (ALD) is a peroxisomal disorder characterized by impaired peroxisomal betaoxidation of very-long-chain fatty acids (VLCFAs). This is probably due to reduced activation of the VLCFAs and results in demyelination of the nervous system and adrenocortical insufficiency. The ALD gene is localized on Xq28, has 10 exons and encodes a protein of 745 amino acids with significant homology to the membrane peroxisomal protein PMP70. Characterizing the disease causing mutations is of importance in prenatal diagnosis because 12-20% of women who are obligatory carriers show false-negative results when tested for VLCFA in plasma. We have analyzed DNA from blood samples of 7 Jewish (5 Sephardi and 2 Ashkenazi) and 3 Arab Israeli families suffering from ALD. Five missense-type mutations were identified: R104H, Y174C, L229P, R401Q, and G512C. A single mutation, R464X, was nonsense, and two, Y171 frameshift and E471 frameshift, were frameshift. Interestingly, a single mutation was identified in three families of Moroccan Jewish descent, probably due to a founder effect.

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No. Sentence Comment
6 Five missense-type mutations were identified: R104H, Y174C, L229P, R401Q, and G512C. Login to comment
50 Three of the mutations-R104H, R401Q, and R464X-were previouslydescribedin patients with ALD and are substitutions of arginine (Fanen et al., 1994; Fuchs et al., 1994; Braun et al., 1995). Login to comment
53 MUTATIONS IN THE ALD GENE Family number Exon cDNA alteration Amino acid alteration Missense: 1 1 G697A R104H 2 1 A907G Y174C 3, 4, 5 1 T1072C L229P 6 3 G1588A R401Q 7 6 G1920T G512C Nonsense: 8 4 C1776T R464X Frameshift: 9 1 901insC Y171 frameshift 10 5 1800insC E471 frameshift FIG. 1. Login to comment

[hide] ABCD1 mutations and the X-linked adrenoleukodystro... Hum Mutat. 2001 Dec;18(6):499-515. Kemp S, Pujol A, Waterham HR, van Geel BM, Boehm CD, Raymond GV, Cutting GR, Wanders RJ, Moser HW
ABCD1 mutations and the X-linked adrenoleukodystrophy mutation database: role in diagnosis and clinical correlations.
Hum Mutat. 2001 Dec;18(6):499-515., [PMID:11748843]

Abstract [show]
X-linked adrenoleukodystrophy (X-ALD) is caused by mutations in the ABCD1 gene, which encodes a peroxisomal ABC half-transporter (ALDP) involved in the import of very long-chain fatty acids (VLCFA) into the peroxisome. The disease is characterized by a striking and unpredictable variation in phenotypic expression. Phenotypes include the rapidly progressive childhood cerebral form (CCALD), the milder adult form, adrenomyeloneuropathy (AMN), and variants without neurologic involvement. There is no apparent correlation between genotype and phenotype. In males, unambiguous diagnosis can be achieved by demonstration of elevated levels of VLCFA in plasma. In 15 to 20% of obligate heterozygotes, however, test results are false-negative. Therefore, mutation analysis is the only reliable method for the identification of heterozygotes. Since most X-ALD kindreds have a unique mutation, a great number of mutations have been identified in the ABCD1 gene in the last seven years. In order to catalog and facilitate the analysis of these mutations, we have established a mutation database for X-ALD ( http://www.x-ald.nl). In this review we report a detailed analysis of all 406 X-ALD mutations currently included in the database. Also, we present 47 novel mutations. In addition, we review the various X-ALD phenotypes, the different diagnostic tools, and the need for extended family screening for the identification of new patients.

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164 X-ALD Mutations Identified in the ABCD1 Gene Allele Exon Mutation Protein Remark fs P42 1 125insC n.d. # fs P84 1 253insC n.d. # E90K 1 268G>A n.d. # S98L 1 293C>T Present S98L 1 293C>T Present R104H 1 311G>A n.d. fs A112 1 337delC Absent # R113C 1 337C>T Present # R113P 1 338G>C n.d. # Q133X 1 397C>T Absent W137X 1 411G>A Absent P143S 1 427C>T n.d. S149N 1 446G>A Present R152S 1 454C>A n.d. R152C 1 454C>T Present R152L 1 455G>T Reduced # S161P 1 481T>C n.d. # R163P 1 488G>C n.d. Y174C 1 521A>G Absent Y174C 1 521A>G n.d. Q177X 1 529C>T Absent Y181C 1 542A>G n.d. fs Y181 1 544ins8bp n.d. # Q195X 1 583C>T n.d. # T198K 1 593C>A n.d. # fs S207 1 621del664bp Absent # SV207-8insAAS 1 622-23ins9bp n.d. # K217E 1 649A>G Present # P218T 1 652C>A n.d. V224E 1 671T>G n.d. # L229P 1 686T>C n.d. L229P 1 686T>C n.d. fs S235 1 706delCGTG n.d. # W242X 1 726G>A Absent G266R 1 796G>A n.d. G266R 1 796G>A n.d. R274W, R280C 1 820C>T, 838C>T n.d. # R285P 1 854G>C n.d. S290X 1 869C>A Absent # E291del 1 871-73delGAG Absent Y296C 1 887A>G n.d. Y296C 1 887A>G n.d. fs E300 IVS1 IVS1+1g>t n.d. # fs E300 IVS1 IVS1-1g>a n.d. # S315X 2 944C>A n.d. # K336M 2 1007A>T n.d. # G343D 2 1028G>A n.d. # R401Q 3 1202G>A Present R401Q 3 1202G>A Present K407X 3 1219A>T n.d. # E427del 4 1279-81delGAA n.d. # Q430X 4 1288C>T n.d. # R464X 4 1390C>T n.d. fs E471 5 1415delAG Absent fs E471 5 1415delAG Absent fs E471 5 1415delAG Absent fs E471 5 1415delAG Absent C511X 6 1533C>A n.d. # R518Q 6 1553G>A Absent fs G528 6 1586-90del Absent # fs Y532 6 1599delG Absent # P543L 6 1628C>T Absent P543L 6 1628C>T Absent fs Q544 6 1628-34duplicated n.d. # fs R545 IVS 6 IVS6+1g>c n.d. # R554H 7 1661G>A Absent fs Q556 7 1670delTG n.d. # (continued) replaced by a pyrimidine (C or T) or vice versa, and transitions, comprising the substitution of one purine by the other, or of one pyrimidine by the other. Login to comment

[hide] Mutational analysis and genotype-phenotype correla... Arch Neurol. 1999 Mar;56(3):295-300. Takano H, Koike R, Onodera O, Sasaki R, Tsuji S
Mutational analysis and genotype-phenotype correlation of 29 unrelated Japanese patients with X-linked adrenoleukodystrophy.
Arch Neurol. 1999 Mar;56(3):295-300., [PMID:10190819]

Abstract [show]
BACKGROUND: X-linked adrenoleukodystrophy (ALD) is an inherited disease characterized by progressive neurologic dysfunction, occasionally associated with adrenal insufficiency. The classic form of ALD usually has onset in childhood (childhood cerebral ALD), with rapid neurologic deterioration leading to a vegetative state. Adult-onset cerebral ALD also presents with rapidly progressive neurologic dysfunction. Milder phenotypes such as adrenomyeloneuropathy and Addison disease only also have been recognized. Despite discovery of the causative gene, a molecular basis for the diverse clinical presentations remains to be elucidated. OBJECTIVES: To conduct mutational analyses in 29 Japanese patients with ALD from 29 unrelated families, to obtain knowledge of the spectrum of mutations in this gene, and to study genotype-phenotype correlations in Japanese patients. METHODS: The 29 patients comprised 13 patients with childhood cerebral ALD, 11 patients with adult-onset cerebral ALD, and 5 patients with adrenomyeloneuropathy. We conducted detailed mutational analyses of 29 unrelated Japanese patients with ALD by genomic Southern blot analysis and direct nucleotide sequence analysis of reverse transcriptase-polymerase chain reaction products derived from total RNA that was extracted from cultured skin fibroblasts, lymphoblastoid cells, or peripheral blood leukocytes. RESULTS: Three patients with adult-onset cerebral ALD were identified as having large genomic rearrangements. The remaining 26 patients were identified as having 21 independent mutations, including 12 novel mutations resulting in small nucleotide alterations in the ALD gene. Eighteen (69%) of 26 mutations were missense mutations. Most missense mutations involved amino acids conserved in homologous gene products, including PMP70, mALDRP, and Pxa1p. The AG dinucleotide deletion at position 1081-1082, which has been reported previously to be the most common mutation in white patients (12%-17%), was also identified as the most common mutation in Japanese patients (12%). All phenotypes were associated with mutations resulting in protein truncation or subtle amino acid changes. There were no differences in phenotypic expressions between missense mutations involving conserved amino acids and those involving nonconserved amino acids. CONCLUSIONS: There are no obvious correlations between the phenotypes of patients with ALD and their genotypes, suggesting that other genetic or environmental factors modify the phenotypic expressions of ALD.

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No. Sentence Comment
87 Review of previous publications indicated that 14 missense mutations are associated exclu- sivelywithAMNorAddisondiseaseonly,includingC696T (R104C),33,34 G697A(R104H),42 C700T(T105I),45 G832A (S149N),35 C918G(Q178E),42 T1045C(L220P),35 C1137T (T254M),37 G1266A(A294T),45 C1551G(R389G),37 G1552A (R389H),33,35 C1638T (R418W),37 C1930T (S515F),38 T2084A(M566K),33 andG2211A(E606K).35,37 Analysisof these mutations may provide important insights into the mechanisms involved in variable phenotypic expressions in ALD. Login to comment

[hide] Mutations in the gene for X-linked adrenoleukodyst... Am J Hum Genet. 1995 Apr;56(4):854-61. Braun A, Ambach H, Kammerer S, Rolinski B, Stockler S, Rabl W, Gartner J, Zierz S, Roscher AA
Mutations in the gene for X-linked adrenoleukodystrophy in patients with different clinical phenotypes.
Am J Hum Genet. 1995 Apr;56(4):854-61., [PMID:7717396]

Abstract [show]
Recently, the gene for the most common peroxisomal disorder, X-linked adrenoleukodystrophy (X-ALD), has been described encoding a peroxisomal membrane transporter protein. We analyzed the entire protein-coding sequence of this gene by reverse-transcription PCR, SSCP, and DNA sequencing in five patients with different clinical expression of X-ALD and in their female relatives; these clinical expressions were cerebral childhood ALD, adrenomyeloneuropathy (AMN), and "Addison disease only" (ADO) phenotype. In the three patients exhibiting the classical picture of severe childhood ALD we identified in the 5' portion of the X-ALD gene a 38-bp deletion that causes a frameshift mutation, a 3-bp deletion leading to a deletion of an amino acid in the ATP-binding domain of the ALD protein, and a missense mutation. In the patient with the clinical phenotype of AMN, a nonsense mutation in codon 212, along with a second site mutation at codon 178, was observed. Analysis of the patient with the ADO phenotype revealed a further missense mutation at a highly conserved position in the ALDP/PMP70 comparison. The disruptive nature of two mutations (i.e., the frameshift and the nonsense mutation) in patients with biochemically proved childhood ALD and AMN further strongly supports the hypothesis that alterations in this gene play a crucial role in the pathogenesis of X-ALD. Since the current biochemical techniques for X-ALD carrier detection in affected families lack sufficient reliability, our procedure described for systematic mutation scanning is also capable of improving genetic counseling and prenatal diagnosis.

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No. Sentence Comment
81 C918G Q178E (missense) 1 Mother, heterozygous for both mutations C1022G Y212STOP (nonsense) ADO-001 . Login to comment
82 G697A R104H (missenseb) 1 Mother, heterozygous a Nucleotide positions of cDNA as published by Mosser et al. Login to comment
124 The G-to-A transition at nucleotide position 697 leads to an arginine-to-histidine substitution at position 104. Login to comment
83 G697A R104H (missenseb) 1 Mother, heterozygous a Nucleotide positions of cDNA as published by Mosser et al. Login to comment
125 The G-to-A transition at nucleotide position 697 leads to an arginine-to-histidine substitution at position 104. Login to comment
123 The G-to-A transition at nucleotide position 697 leads to an arginine-to-histidine substitution at position 104. Login to comment

[hide] Molecular analysis in X-linked adrenoleukodystroph... Metab Brain Dis. 2014 Sep;29(3):809-12. doi: 10.1007/s11011-014-9552-1. Epub 2014 May 1. Durmaz A, Atik T, Onay H, Canda EE, Ucar SK, Bademkiran F, Coker M, Cogulu O, Ozkinay F
Molecular analysis in X-linked adrenoleukodystrophy patients: identification of a novel mutation.
Metab Brain Dis. 2014 Sep;29(3):809-12. doi: 10.1007/s11011-014-9552-1. Epub 2014 May 1., [PMID:24788897]

Abstract [show]
X linked adrenoleukodystrophy (X-ALD) is a neurodegenerative disease characterized by progressive demyelination of the central nervous system, adrenocortical insufficiency and elevated levels of very long chain fatty acids (VLCFAs). It is caused by mutations in ABCD1 gene located at Xq28. More than 1,300 mutations have been identified to date which is unique to each patient. In this study we report the mutational analysis of 2 X-ALD patients (1 male and 1 female) showing variable clinical spectrum. The mutation analysis of the female patient revealed IVS5-6delC (c.1489-6delC) and p. P543L variations in compound heterozygous state. The male patient was found to be hemizygous for a novel mutation, p. R104P. In conclusion, while defining a novel mutation, the cases presented herein may contribute to the mutation and clinical spectrum of X-ALD.

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No. Sentence Comment
67 p. R104H and p. R104K mutations occuring at the same amino acid residue had been previously reported (Kemp et al. 2001). Login to comment
68 An absent enzyme activity was first reported in an Israeli patient having p. R104H mutation (Neumann et al. 2001). Login to comment