ABCC7 p.Arg1070Lys
| ClinVar: |
c.3209G>C
,
p.Arg1070Pro
?
, not provided
c.3209G>A , p.Arg1070Gln D , Pathogenic/Likely pathogenic, not provided c.3208C>T , p.Arg1070Trp ? , not provided |
| CF databases: |
c.3209G>A
,
p.Arg1070Gln
?
, Varying clinical consequence ; CFTR1: This missense mutation was found in one Italian CF patient. The nucleotide change was G->A at position 3341 of exon 17b leading to R 1070 Q amino acid change. It was found once using DGGE screening and DNA sequencing among 50 Italian CF chromosomes.
c.3208C>T , p.Arg1070Trp ? , Varying clinical consequence ; CFTR1: Teh R1070W mutation was detected on 1 US Caucasian chromosome out of 48 screened. ASO analysis of 100 non-CF Caucasian chromosomes did not reveal this mutation on any of the tested chromosomes. The 15 months old CBAVD patient carries the [delta]F508 mutation on the other allele. c.3209G>C , p.Arg1070Pro (CFTR1) ? , This 26 year old individual of Polish extraction with mild CF presented at age 11 with nasal polyps. He had noted salt crystals on his skin in warm weather, but did not have a chronic cough or gastrointestinal complaints. Pulmonary function tests and chest X-ray were normal. Sweat chloride was 121 mMol/L (repeat value was 104 mMol/L). No formal pancreatic function testing was performed. Most recent pulmonary function tests show mild obstructive airways disease. This individual is a compound heterozygote for the 2143delT CF mutations. R1070P was originally detected by SSC/HA and can be detected by virtue of the creation of a Sau96I or destruction of a BslI site. Mutation R1070P was also reported by Dörk T, Hughes D, Dworniczak B, Stuhrmann M (Jan 30, (NL#69)) in a CF patient from Northern Ireland who carried R1070P on his paternal and [delta]F508 on his maternal allele. |
| Predicted by SNAP2: | A: N (66%), C: D (53%), D: D (85%), E: D (75%), F: D (91%), G: D (71%), H: N (57%), I: D (63%), K: N (66%), L: D (63%), M: D (66%), N: D (63%), P: D (71%), Q: D (75%), S: D (53%), T: D (63%), V: D (63%), W: D (95%), Y: D (71%), |
| Predicted by PROVEAN: | A: N, C: N, D: N, 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: N, |
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[hide] The cystic fibrosis-causing mutation deltaF508 aff... J Biol Chem. 2010 Nov 12;285(46):35825-35. Epub 2010 Jul 28. Thibodeau PH, Richardson JM 3rd, Wang W, Millen L, Watson J, Mendoza JL, Du K, Fischman S, Senderowitz H, Lukacs GL, Kirk K, Thomas PJ
The cystic fibrosis-causing mutation deltaF508 affects multiple steps in cystic fibrosis transmembrane conductance regulator biogenesis.
J Biol Chem. 2010 Nov 12;285(46):35825-35. Epub 2010 Jul 28., 2010-11-12 [PMID:20667826]
Abstract [show]
The deletion of phenylalanine 508 in the first nucleotide binding domain of the cystic fibrosis transmembrane conductance regulator is directly associated with >90% of cystic fibrosis cases. This mutant protein fails to traffic out of the endoplasmic reticulum and is subsequently degraded by the proteasome. The effects of this mutation may be partially reversed by the application of exogenous osmolytes, expression at low temperature, and the introduction of second site suppressor mutations. However, the specific steps of folding and assembly of full-length cystic fibrosis transmembrane conductance regulator (CFTR) directly altered by the disease-causing mutation are unclear. To elucidate the effects of the DeltaF508 mutation, on various steps in CFTR folding, a series of misfolding and suppressor mutations in the nucleotide binding and transmembrane domains were evaluated for effects on the folding and maturation of the protein. The results indicate that the isolated NBD1 responds to both the DeltaF508 mutation and intradomain suppressors of this mutation. In addition, identification of a novel second site suppressor of the defect within the second transmembrane domain suggests that DeltaF508 also effects interdomain interactions critical for later steps in the biosynthesis of CFTR.
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No. Sentence Comment
343 Decreases in side-chain volume (Ala/Gly/Thr substitution) and the presence of charge (Arg-1070 and R1070K) fail to facilitate ⌬F508 trafficking.
X
ABCC7 p.Arg1070Lys 20667826:343:99
status: NEW