Two Deafness-Causing Actin Mutations (DFNA20/26) Have Allosteric Effects on the Actin Structure.
Two Deafness-Causing Actin Mutations (DFNA20/26) Have Allosteric Effects on the Actin Structure.
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两种导致耳聋的肌动蛋白突变 (DFNA20/26) 对肌动蛋白结构具有变构作用。
DOI:
10.1016/j.bpj.2016.06.012
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发表时间:
2016
影响因子:
3.4
通讯作者:
Sept,David
中科院分区:
文献类型:
--
作者:
Jepsen,Lauren;Kruth,KarinaA;Rubenstein,PeterA;Sept,David
Point mutations inγ-cytoplasmic actin have been shown to result in autosomal-dominant, nonsyndromic, early-onset deafness. Two mutations at the same site, K118M and K118N, provide a unique opportunity to compare the effects of two dissimilar amino acid substitutions that produce a similar phenotype in humans. K118 resides in a helix that runs from K113 to T126, and mutations that alter the position, dynamics, and/or biochemistry of this helix can result in a wide range of pathologies. Using a combination of computational and experimental studies, both employing yeast actin, we find that these mutations at K118 result in changes in the structure and dynamics of the DNase-I loop, alterations in the structure of the H73 loop as well as the side-chain orientations of W79 and W86, changes in nucleotide exchange rates, and significant shifts in the twist of the actin monomer. Interestingly, in the case of K118N, the twist of the monomer is nearly identical to that of the F-actin protomer, and in vitro polymerization assays show that this mutation results in faster polymerization. Taken together, these results indicate that mutations at this site give rise to a series of small changes that can be tolerated in vivo but result in misregulation of actin assembly and dynamics.
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影响因子:
4.8
作者:
X. Yao;S. Grade;W. Wriggers;P. Rubenstein
通讯作者:
P. Rubenstein
影响因子:
64.8
作者:
Fujii, Takashi;Iwane, Atsuko H.;Namba, Keiichi
通讯作者:
Namba, Keiichi
DOI:
10.1088/1749-4699/4/1/015002
发表时间:
2011-01-01
期刊:
Computational science & discovery
影响因子:
--
作者:
Wang, Yi;Harrison, Christopher B;McCammon, J Andrew
通讯作者:
McCammon, J Andrew
DOI:
10.1111/j.1432-1033.1993.tb17603.x
发表时间:
1993
期刊:
European journal of biochemistry
影响因子:
--
作者:
H. Strzelecka;Joanna Moraczewska;Sofia Khaitlina;Małgorzata Mossakowska
通讯作者:
Małgorzata Mossakowska
影响因子:
3.5
作者:
Morin, Matias;Bryan, Keith E.;Angel Moreno-Pelayo, Miguel
通讯作者:
Angel Moreno-Pelayo, Miguel