ABCB11 p.Arg958Gln
| Reviews: |
p.Arg958Gln
N
|
| Predicted by SNAP2: | A: N (78%), C: N (72%), D: N (66%), E: N (72%), F: N (66%), G: N (66%), H: N (93%), I: N (66%), K: N (93%), L: N (61%), M: N (78%), N: N (82%), P: N (57%), Q: N (87%), S: N (87%), T: N (87%), V: N (72%), W: D (53%), Y: N (78%), |
| Predicted by PROVEAN: | A: N, C: D, D: D, E: N, F: D, G: D, H: N, I: D, K: N, L: D, M: N, N: N, P: D, Q: N, S: N, T: N, V: D, W: D, Y: D, |
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[hide] Genetic variability, haplotype structures, and eth... Drug Metab Dispos. 2006 Sep;34(9):1582-99. Epub 2006 Jun 8. Lang T, Haberl M, Jung D, Drescher A, Schlagenhaufer R, Keil A, Mornhinweg E, Stieger B, Kullak-Ublick GA, Kerb R
Genetic variability, haplotype structures, and ethnic diversity of hepatic transporters MDR3 (ABCB4) and bile salt export pump (ABCB11).
Drug Metab Dispos. 2006 Sep;34(9):1582-99. Epub 2006 Jun 8., [PMID:16763017]
Abstract [show]
Biliary excretion of bile salts and other bile constituents from hepatocytes is mediated by the apical (canalicular) transporters P-glycoprotein 3 (MDR3, ABCB4) and the bile salt export pump (ABCB11). Mutations in ABCB4 and ABCB11 contribute to cholestatic diseases [e.g., progressive familial intrahepatic cholestasis 2 (PFIC2), PFIC3, and intrahepatic cholestasis of pregnancy], and our objective was to establish genetic variability and haplotype structures of ABCB4 and ABCB11 in healthy populations of different ethnic backgrounds. All coding exons, 5 of 6 noncoding exons, 50 to 300 base pairs of the flanking intronic regions, and 2.5 to 2.8 kilobase pairs of the promoter regions of ABCB4 and ABCB11 were sequenced in 159 and 196 DNA samples of Caucasian, African-American, Japanese, and Korean origin. In total, 76 and 86 polymorphisms were identified in ABCB4 and ABCB11, respectively; among them, 14 and 28 exonic polymorphisms, and 8 and 10 protein-altering variants, of which 4 were predicted to have functional consequences. Both genes showed substantial ethnic differences with respect to allele number, frequency of common and population-specific sites, and patterns of linkage disequilibrium. Population genetic analysis suggested some selective pressure against changes in the protein, supporting the important endogenous role of these transporters. Haplotype variability was greater in ABCB11 than in ABCB4. An ABCB11 promoter haplotype was associated with significant decrease of activity compared with wild type. Our results contribute to a better understanding of the molecular basis and of ethnic differences in drug response, and provide a valuable tool for future research on the heredity of cholestatic liver injury.
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108 Of 19 genetic variants in coding and noncoding exons, 8 TABLE 4 Continued Variant ID 5Ј Sequence Genetic Variation 3Ј Sequence Region Amino Acid Change CA AA JA Total n % n % n % n 48 TTTTGTAGC g.73233AϾG ATGGGCTGT Exon 20 A804A 200 0.0 66 93.9 96 0.0 362 1.1 49 CTACAGATG g.73505CϾT TTCCCAAGT Exon 21 A865V 178 0.0 74 0.0 82 2.4 334 0.6 73 TGGGAGGGG g.73539AϾC AATAGAAGT Intron 21 176 0.6 74 0.0 84 0.0 334 0.3 74 TGGTAAAAG g.81650CϾT GACTGTGTG Intron 21 196 0.0 86 1.2 94 0.0 376 0.3 75 GTCACGAAA g.82653GϾA GAGTTATTT Intron 22 136 0.0 90 0.0 46 2.2 272 0.4 50 GTTATTTCT g.82665GϾA CCCTTGTAT Intron 22 202 0.0 92 6.5 82 0.0 376 1.6 76 AGGAGAGGC g.82759GϾA GTTCATTGA Exon 23 R958Q 202 0.0 92 0.0 94 1.1 388 0.3 77 CAATATTTA g.82829CϾT GGATTCTGC Exon 23 Y981Y 200 0.0 92 1.1 94 0.0 386 0.3 78 GTTTATTGC g.82871GϾA AATTCTGCT Exon 23 A995A 200 0.0 92 1.1 94 0.0 386 0.3 51 ACTGAGTGC g.85620AϾG ACAGCTCTT Exon 24 A1028A 194 54.1 76 26.3 90 47.8 360 47.8 79 CTATGCAGC g.85774CϾA ATAAAAAAG Intron 24 194 0.0 76 0.0 90 1.1 360 0.3 80 GCAAACTAA g.85848CϾG ACAAGAACA Intron 24 194 0.0 76 1.3 90 0.0 360 0.3 52 TAAATTTAC g.87308AϾG TATCCTTCT Exon 25 T1086T 186 0.0 76 7.9 82 0.0 344 1.7 53 CAATCATGC g.94270AϾG TCTTTGCAT Intron 27 172 55.2 64 75.0 94 51.1 330 48.2 81 CCAGAACGC g.94387GϾA GATATCATT Exon 28 A1283A 194 0.0 64 0.0 94 1.1 352 0.3 82 TCCCAGCAG g.94582GϾA AGGGATTGT Exon 28 192 0.0 26 0.0 88 1.1 306 0.3 n, number of alleles analyzed (number of subjects times 2); %, allele frequencies for Caucasians (CA), African Americans (AA), and Japanese (JA).
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ABCB11 p.Arg958Gln 16763017:108:730
status: NEW117 Six singletons were detected in exon 8 (c.616AϾG 3 p.I206V), exon 9 (c.851TϾC 3 p.V284 and c.A896GϾA 3 p.R299K), exon 16 (1855AϾG 3 p.T619A), exon 18 (c.2093GϾA 3 p.R698H), and exon 23 (c.2873GϾA 3 p.R958Q).
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ABCB11 p.Arg958Gln 16763017:117:236
status: NEW177 Amino Acid Change Scoring Systems for Nonsynonymous Variants Grantham SIFT PolyPhen Blosum62 EC/EU MDR3 D87E 45 1.00 0.48 2 EC P95S 74 0.48 0.87 -1 EC T175A 58 0.01 0.72 -1 EC I367V 29 0.23 0.96 3 EC E450G 98 0.01 0.13 -2 EC R590Q 43 0.01 2.51 1 EC R652G 125 0.36 1.47 -2 EU E1099G 98 0.04 1.58 -2 EC BSEP I206V 29 1.00 0.23 3 EU V284A 64 0.13 0.43 -2 EC R299K 26 1.00 0.38 2 EU V444A 64 0.63 0.78 -2 EC R616G 125 0.01 3.16 -2 EC T619A 58 0.00 1.78 -1 EC M677V 21 0.29 0.82 1 EU R698H 29 0.30 0.57 0 EC A865V 64 0.02 1.12 0 EC R958Q 43 0.04 0.24 1 EU neutral mutation model (Tajima, 1989).
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ABCB11 p.Arg958Gln 16763017:177:527
status: NEW[hide] Genetic variations of the ABC transporter gene ABC... Drug Metab Pharmacokinet. 2009;24(3):277-81. Kim SR, Saito Y, Itoda M, Maekawa K, Kawamoto M, Kamatani N, Ozawa S, Sawada J
Genetic variations of the ABC transporter gene ABCB11 encoding the human bile salt export pump (BSEP) in a Japanese population.
Drug Metab Pharmacokinet. 2009;24(3):277-81., [PMID:19571440]
Abstract [show]
The bile salt export pump (BSEP) encoded by ABCB11 is located in the canalicular membrane of hepatocytes and mediates the secretion of numerous conjugated bile salts into the bile canaliculus. In this study, 28 ABCB11 exons (including non-coding exon 1) and their flanking introns were comprehensively screened for genetic variations in 120 Japanese subjects. Fifty-nine genetic variations, including 19 novel ones, were found: 14 in the coding exons (6 nonsynonymous and 8 synonymous variations), 4 in the 3'-UTR, and 41 in the introns. Three novel nonsynonymous variations, 361C>A (Gln121Lys), 667C>T (Arg223Cys), and 1460G>T (Arg487Leu), were found as heterozygotes and at 0.004 allele frequencies. These data provide fundamental and useful information for genotyping ABCB11 in the Japanese and probably other Asian populations.
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No. Sentence Comment
52 The variation 2873GÀA (Arg958Gln) previously reported in Japanese at a frequency of 0.011 was not detected in this study.
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ABCB11 p.Arg958Gln 19571440:52:28
status: NEW[hide] The bile salt export pump (BSEP) in health and dis... Clin Res Hepatol Gastroenterol. 2012 Dec;36(6):536-53. doi: 10.1016/j.clinre.2012.06.006. Epub 2012 Jul 12. Kubitz R, Droge C, Stindt J, Weissenberger K, Haussinger D
The bile salt export pump (BSEP) in health and disease.
Clin Res Hepatol Gastroenterol. 2012 Dec;36(6):536-53. doi: 10.1016/j.clinre.2012.06.006. Epub 2012 Jul 12., [PMID:22795478]
Abstract [show]
The bile salt export pump (BSEP) is the major transporter for the secretion of bile acids from hepatocytes into bile in humans. Mutations of BSEP are associated with cholestatic liver diseases of varying severity including progressive familial intrahepatic cholestasis type 2 (PFIC-2), benign recurrent intrahepatic cholestasis type 2 (BRIC-2) and genetic polymorphisms are linked to intrahepatic cholestasis of pregnancy (ICP) and drug-induced liver injury (DILI). Detailed analysis of these diseases has considerably increased our knowledge about physiology and pathophysiology of bile secretion in humans. This review focuses on expression, localization, and function, short- and long-term regulation of BSEP as well as diseases association and treatment options for BSEP-associated diseases.
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185 PFIC BRIC/NFC ICP Other liver diseases Genetic variants without disease association Missense mutations M1V C336S D549V L1055P E135K E137K T87R V43I S701P G19R W342G G556R C1083Y E137K L198P M123T S56L L712L L50S A382G G562D A1110E E186G E297G S194P Q121K A865D M62K R387H A570T S1114R L198P R415Q L198P R128H A865G C68Y A390P L581F G1116E E297G V444A G260D I206V S874P C107R G410D A588V G1116F G374S D482G E297K V284A I939M I112T L413W S593R G1116R A390P N591S V444A G295C R958Q W114R I420T I627T S1120N R432T T655I T510T G295R F959C Y157C D440E E636G R1128C V444A T655I G295S F959V A167T G455E R698C S1144R I498T D676Y R299K T965S A167V K461E S699P R1153C A570T P710P R303K F971L I182K T463I E709K R1153H T586I L827I L339V F971Y M183T Q466K G758R S1154P G648V G855R H423R L1006F M183V R470Q G766R N1173D T655I E1186K V444A N1009H G188W Y472C Y818F T1210P T923P V444D K1145N M217R V481E R832C N1211D A926P V444G I1183T R223C D482G R832H V1212F R948C A459V S226L R487H T859R R1231Q G1004D I468I G238V R487P A865V R1231W R1050C R487L T242I N490D Q869P L1242I G1116R Q546K A257G I498T G877R D1243G R1128H Q558H V284L G499E S901R R1268Q L1197G E592Q E297G I512T R948C A1283V R1231Q V597M R303G N515T N979D G1292V R616G R303K R517H G982R G1298R T619A Q312H F540L G1004D M677L R313S I541L T1029K M677V G327E I541T G1032R R696Q W330R F548Y A1044P R698H Nonsense mutations (premature stop-codons) S25X Y472X Y772X R1090X E96X W493X Q791X V1147X W330X R520X R928X Q1215X Y354X I528X Y1041X R1235X R415X R575X R1057X E1302X R470X Q702X Q1058X Table 1 (Continued) PFIC BRIC/NFC ICP Other liver diseases Genetic variants without disease association Splice site mutations 76 + 3G > T 908 + 1delG 2178 + 1G > T 3057-2A > G Q159Q 77-1G > C 908 + 1G > T 2179-2A > G 3213 + 1delG Q361Q 99-1G > T 908 + 1G > A 2343 + 1G > T 3213 + 4A > G 150 + 3A > C 1435-13 -8del 2343 + 2T > C 3213 + 5G > A 390-1G > A 2012-8T > G 2611-2A > T 611 + 1G > A 2178 + 1G > A R1001R Deletions/insertions/frame shifts Q101Dfs8X L380Wfs18X G648Vfs5X Q1058Hfs38X F959Hfs1X T127Hfs6X A382 A388del K700Sfs12X I1061Vfs34X F959Gfs48X N199Ifs14X P456Pfs24X T919del L1165del L232Cfs9X H484Rfs5X K930Efs92X A1192Efs50X R303Sfs17X I528Sfs21X K930Efs79X T1256Tfs40X V368Rfs27X I610Qfs45X K969 K972del Synonymous variants without disease association R33R F90F L232L I416I G557G I876I A1028A K1145K D36D I134I Y269Y G418G V597V G937G K1070K R52R S136S Q312Q F427F A804A Y981Y T1086T D58D V195V G319G E395E A535A G817G G1004G A1110A The overview shows ࣈ 290 known variants of BSEP on the protein level, except splice site mutations, which are shown on cDNA level.
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ABCB11 p.Arg958Gln 22795478:185:473
status: NEW