ABCC7 p.Met1137Cys
| ClinVar: |
c.3409A>G
,
p.Met1137Val
?
, not provided
c.3410T>G , p.Met1137Arg ? , not provided |
| CF databases: |
c.3409A>G
,
p.Met1137Val
(CFTR1)
?
, This mutation (M1137V) in exon 18 of CFTR gene. The nucleotide at position 3541 was changed from A to G leading to a substitution of methionine codon for valine codon at position 1137. The mutation was foudn once in 384 chromsomes (289 CF chromosomes and 95 normal chromosomes) screened. Mutation on the other chromosome of the pancreatic sufficient patient is unknown.
c.3410T>C , p.Met1137Thr (CFTR1) ? , The mutation was detected by DGGE analysis and characterized by direct sequencing. We have seen it only twice, in over 1300 control chromosomes from Italian population. c.3410T>G , p.Met1137Arg (CFTR1) ? , The M1137R mutation has been found once in 59 non-[delta]F508 chromosomes from the Portuguese population, associated with haplotype C. The patient carries the F1052V mutation on the other chromosome and presents a mild form of CF. M1137R was found neither in 28 normal chromosomes nor in 31 [delta]F508 CF chromosomes. |
| Predicted by SNAP2: | A: D (95%), C: D (91%), D: D (95%), E: D (95%), F: D (95%), G: D (95%), H: D (95%), I: D (85%), K: D (95%), L: D (85%), N: D (95%), P: D (95%), Q: D (95%), R: D (95%), S: D (95%), T: D (95%), V: N (72%), W: D (95%), Y: D (95%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: N, G: D, H: D, I: N, K: D, L: N, N: D, P: D, Q: D, R: D, S: D, T: D, V: N, W: D, Y: D, |
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[hide] Functional arrangement of the 12th transmembrane r... Pflugers Arch. 2011 Oct;462(4):559-71. Epub 2011 Jul 28. Qian F, El Hiani Y, Linsdell P
Functional arrangement of the 12th transmembrane region in the CFTR chloride channel pore based on functional investigation of a cysteine-less CFTR variant.
Pflugers Arch. 2011 Oct;462(4):559-71. Epub 2011 Jul 28., [PMID:21796338]
Abstract [show]
The membrane-spanning part of the cystic fibrosis transmembrane conductance regulator (CFTR) Cl(-) channel comprises 12 transmembrane (TM) alpha-helices, arranged into two pseudo-symmetrical groups of six. While TM6 in the N-terminal TMs is known to line the pore and to make an important contribution to channel properties, much less is known about its C-terminal counterpart, TM12. We have used patch clamp recording to investigate the accessibility of cytoplasmically applied cysteine-reactive reagents to cysteines introduced along the length of TM12 in a cysteine-less variant of CFTR. We find that methanethiosulfonate (MTS) reagents irreversibly modify cysteines substituted for TM12 residues N1138, M1140, S1141, T1142, Q1144, W1145, V1147, N1148, and S1149 when applied to the cytoplasmic side of open channels. Cysteines sensitive to internal MTS reagents were not modified by extracellular [2-(trimethylammonium)ethyl] MTS, consistent with MTS reagent impermeability. Both S1141C and T1142C could be modified by intracellular [2-sulfonatoethyl] MTS prior to channel activation; however, N1138C and M1140C, located deeper into the pore from its cytoplasmic end, were modified only after channel activation. Comparison of these results with previous work on CFTR-TM6 allows us to develop a model of the relative positions, functional contributions, and alignment of these two important TMs lining the CFTR pore. We also propose a mechanism by which these seemingly structurally symmetrical TMs make asymmetric contributions to the functional properties of the channel pore.
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No. Sentence Comment
90 A similar lack of effect following prolonged (>5 min) exposure to such high concentrations of both MTSES and MTSET was also observed in ten out of 19 cysteine-substituted mutants tested (I1131C, I1132C, L1133C, T1134C, L1135C, A1136C, M1137C, I1139C, L1143C, and A1146C).
X
ABCC7 p.Met1137Cys 21796338:90:235
status: NEW