ABCC8 p.Asn406Asp
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63
Mutations within the SUR1 gene Patient Exon or intron Nucleotide changea Codona predicted effect Domainb Restriction site change Frequency (%) HI chromosomes (n = 88) Segregation demonstrated Frequency 200 normal chromosomes A1 exon 2 221G→A R74Q Tm PstI 1 (1.1%) NA 0 B2d exon3 375C→G H125Q Tm DdeIc 1 (1.1%) NA 0 C3e exon 4 563A→G N188S Tm TspRI 1 (1.1%) yes 0 D4 exon 6 949delC 317fs/ter Tm Bsp1286I 1 (1.1%) yes 0 E5 exon 8 1216A→G N406D Tm XcmI 1 (1.1%) NA 0 F6f intron 10 1630+1G→T aberrant splicing Tm BsrI 2 (2.3%) yes 0 G7 exon 12 1773C→G F591L Tm BsoF1 1 (1.1%) no 0 H8 exon 13 1893delT 631fs/ter Tm BstNI 1 (1.1%) yes 0 F6f intron 15 2117-1G→A aberrant splicing NBF-1 PstI 1 (1.1%) yes 0 I9 exon 24 2860C→T Q954X - BstNI 1 (1.1%) yes 0 J10g exon 28 3416C→Th T1139M Tm NlaIII 1 (1.1%) yes 0 K11 exon 29 3644G→A R1215Q Tm NciI 1 (1.1%) yes 0 J10g intron 32 3992-9G→Ai aberrant splicing NBF-2 NciI 4 (4.5%) yes 0 C3e intron 32 3992-3C→G aberrant splicing NBF-2 AvaI 1 (1.1%) yes 0 L12 exon 34 4135G→C G1379R NBF-2 EagI 1 (1.1%) yes 0 M13 exon 34 4144G→A G1382S NBF-2 BglI 1 (1.1%) yes 0 B2d exon 34 4162delTTCi,j delF 1388 NBF-2 BseRI 1 (1.1%) yes 0 J10g exon 34 4181G→Ah R1394H NBF-2 DraIII 1 (1.1%) yes 0 N14 exon 35 4310G→Ai aberrant splicing NBF-2 MspI 1 (1.1%) yes 0 O15 exon 37 4525insCGGCTT insertion of AlaSer ft d 1508 NBF-2 PvuIIk 1 (1.1%) yes 0 after codon 1508 aNucleotide and codon positions are according to the full-length human SUR1 cDNA sequence incorporating the alternative splicedform of exon 17 (GenBank accession nos L78208 and L78216).
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ABCC8 p.Asn406Asp 9618169:63:464
status: NEW200 A model for SUR1 (29) predicts that the remaining seven missense mutations (Arg74Gln, His125Gln, Asn188Ser, Asn406Asp, Phe591Leu, Thr1139Met, Arg1215Gln) are located either within transmembrane segments or are present on the extracellular or cytoplasmic loops connecting adjacent trans- membranehelices.Theidentificationofthesemissensemutations in HI patients provides a basis for further studies to elucidate the functions of these transmembrane domains in SUR1 and KATP channel activity.
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ABCC8 p.Asn406Asp 9618169:200:108
status: NEW203 The functional significance of the Arg74Gln and Asn406Asp mutations upon SUR1 regulation of KATP channel activity are currently unknown.
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ABCC8 p.Asn406Asp 9618169:203:48
status: NEW