ABCG5 p.Met622Val
| ClinVar: |
c.1864A>G
,
p.Met622Val
?
, Uncertain significance
|
| Predicted by SNAP2: | A: D (63%), C: D (71%), D: D (91%), E: D (85%), F: D (63%), G: D (80%), H: D (80%), I: D (59%), K: D (80%), L: D (53%), N: D (85%), P: D (85%), Q: D (80%), R: D (75%), S: D (71%), T: D (66%), V: N (53%), W: D (85%), Y: D (63%), |
| Predicted by PROVEAN: | A: N, C: N, D: N, E: N, F: N, G: D, H: N, I: N, K: N, L: N, N: N, P: N, Q: N, R: N, S: N, T: N, V: N, W: N, Y: N, |
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[hide] Mutations in ATP-cassette binding proteins G5 (ABC... Hum Mutat. 2001 Oct;18(4):359-60. Hubacek JA, Berge KE, Cohen JC, Hobbs HH
Mutations in ATP-cassette binding proteins G5 (ABCG5) and G8 (ABCG8) causing sitosterolemia.
Hum Mutat. 2001 Oct;18(4):359-60., [PMID:11668628]
Abstract [show]
Sitosterolemia is an autosomal recessive disorder caused by mutations in two adjacent genes encoding coordinately regulated ATP binding cassette (ABC) half transporters (ABCG5 and ABCG8). In this paper we describe three novel mutations causing sitosterolemia: 1) a frameshift mutation (c.336-337insA) in ABCG5 that results in premature termination of the protein at amino acid 197; 2) a missense mutation that changes a conserved residue c.1311C>G; N437K) in ABCG5 and 3) a splice site mutation in ABCG8 (IVS1-2A>G). This study expands the spectrum of the ABCG5 and ABCG8 mutations that cause sitosterolemia. Nine nonsynonymous polymorphisms are also reported: I523V, C600Y, Q604E, and M622V in ABCG5; and D19H, Y54C, T400K, A632V, and Y641F in ABCG8.
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No. Sentence Comment
6 Nine nonsynonymous polymorphisms are also reported: I523V, C600Y, Q604E, and M622V in ABCG5; and D19H, Y54C, T400K, A632V, and Y641F in ABCG8.
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ABCG5 p.Met622Val 11668628:6:77
status: VERIFIED36 Gene Exon NT change AA change Allele frequency RE ABCG5 ABCG8 ex. 11 ex. 13 ex. 13 ex. 13 ex. 1 ex. 2 ex. 8 ex. 13 ex. 13 c.1567 A>G c.1799 G>A c.1810 C>G c.1864 A>G c.52 G>C c.161 A>G c.1199 C>A c.1895 C>T c.1922 A>T I523V C600Y Q604E M622V D19H Y54C T400K A632V Y641F <1% <1% C=0.80/G=0.20 <1% G=0.94/C=0.06 A=0.61/G=0.39 C=0.80/A=0.20 C=0.83/T=0.17 A=0.99/T=0.01 XmnI TsrpI SexAI MseI NcoI MboII *The polymorphisms were found either in sitosterolemic probands or in genomic DNA from 24 individuals with high plasma cholesterol concentrations. Allele frequencies of the nonsynonymous sequence variants identified were determined in 50 unrelated Caucasians.
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ABCG5 p.Met622Val 11668628:36:236
status: VERIFIED[hide] Stomatocytic haemolysis and macrothrombocytopenia ... Br J Haematol. 2005 Jul;130(2):297-309. Rees DC, Iolascon A, Carella M, O'marcaigh AS, Kendra JR, Jowitt SN, Wales JK, Vora A, Makris M, Manning N, Nicolaou A, Fisher J, Mann A, Machin SJ, Clayton PT, Gasparini P, Stewart GW
Stomatocytic haemolysis and macrothrombocytopenia (Mediterranean stomatocytosis/macrothrombocytopenia) is the haematological presentation of phytosterolaemia.
Br J Haematol. 2005 Jul;130(2):297-309., [PMID:16029460]
Abstract [show]
Phytosterolaemia (sitosterolaemia) is a recessively inherited metabolic condition in which the absorption of both cholesterol and plant-derived cholesterol-like molecules at the gut is unselective and unrestricted. In haematology, Mediterranean stomatocytosis or Mediterranean macrothrombocytopenia is a poorly understood haematological condition that combines stomatocytic haemolysis with the presence of very large platelets. Five pedigrees showing this haematology were identified. Gas chromatography mass spectrometry (GC-MS) showed that all of the patients with this highly specific haematology had grossly elevated levels of phytosterols in the blood, diagnostic of phytosterolaemia. All showed mutations in the ABCG5 and ABCG8 previously linked to phytosterolaemia. Three pedigrees showed five new mutations, while two pedigrees showed the common W361X mutation in ABCG8. We draw the following four conclusions: (i) that Mediterranean stomatocytosis/macrothrombocytopenia is caused by an excess of phytosterols in the blood; (ii) that phytosterolaemia, which does not respond to standard statin treatment, can be diagnosed via the distinctive haematology described here, even when the cholesterol is normal; (iii) that phytosterolaemia should be considered in the differential diagnosis of all patients with large platelets; and (iv) that the platelet size should be noted in patients with hypercholesterolaemia.
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No. Sentence Comment
174 Family Sitosterol level (lmol/l) ABCG5 ABCG8 A E77X (229G>T) A-I-2 44 m/n A-II-1 1471 m/m A-II-2 17 n/n A-II-3 57 n/n A-II-4 970 m/m A-II-5 625 m/m A-II-9 508 m/m B IVS11+3insT R50C (148C>T) E146X (436G>T), M622V (1864A>G) B-I-1 77 n/n m/n B-I-2 42 m/n n/n B-II-1 2230 m/n m/n B-II-2 2350 m/n m/n B-II-3 137 n/n m/n C Q604E (1810C>G) Q271X (811C>T) IV9-3insT IV8-1G/A C54Y (161G>A) C-I-1 114 m/n n/n m/n m/n C-I-2 29 m/m m/n n/n m/m C-II-1 2100 m/n m/n m/n m/n C-II-2 2580 m/n m/n m/n m/n D W361X (1083G>A) D-I-1 22 m/n D-II-1 715 m/m E W361X (1083G>A) E-I-1 23 m/n E-II-1 1844 m/m E-II-2 21 n/n Mutations are shown in bold and large font.
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ABCG5 p.Met622Val 16029460:174:207
status: VERIFIED