The structure of the C-terminal actin-binding domain of talin.
The structure of the C-terminal actin-binding domain of talin.
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塔林的C末端肌动蛋白结合结构域的结构。
DOI:
10.1038/sj.emboj.7601965
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发表时间:
2008-01-23
期刊:
影响因子:
11.4
通讯作者:
Critchley, David R.
中科院分区:
文献类型:
--
作者:
Gingras, Alexandre R.;Bate, Neil;Goult, Benjamin T.;Hazelwood, Larnele;Canestrelli, Ilona;Grossmann, J. Gunter;Liu, HongJun;Putz, Nicholas S. M.;Roberts, Gordon C. K.;Volkmann, Niels;Hanein, Dorit;Barsukov, Igor L.;Critchley, David R.
Talin is a large dimeric protein that couples integrins to cytoskeletal actin. Here, we report the structure of the C-terminal actin-binding domain of talin, the core of which is a five-helix bundle linked to a C-terminal helix responsible for dimerisation. The NMR structure of the bundle reveals a conserved surface-exposed hydrophobic patch surrounded by positively charged groups. We have mapped the actin-binding site to this surface and shown that helix 1 on the opposite side of the bundle negatively regulates actin binding. The crystal structure of the dimerisation helix reveals an antiparallel coiled-coil with conserved residues clustered on the solvent-exposed face. Mutagenesis shows that dimerisation is essential for filamentous actin (F-actin) binding and indicates that the dimerisation helix itself contributes to binding. We have used these structures together with small angle X-ray scattering to derive a model of the entire domain. Electron microscopy provides direct evidence for binding of the dimer to F-actin and indicates that it binds to three monomers along the long-pitch helix of the actin filament.
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DOI:
10.1107/s0907444902015391
发表时间:
2002-11-01
影响因子:
2.2
作者:
Potterton, E;McNicholas, S;Noble, M
通讯作者:
Noble, M
影响因子:
2.7
作者:
DELAGLIO, F;GRZESIEK, S;BAX, A
通讯作者:
BAX, A
影响因子:
3.9
作者:
Critchley, DR
通讯作者:
Critchley, DR
影响因子:
5.7
作者:
Fillingham, I;Gingras, AR;Barsukov, IL
通讯作者:
Barsukov, IL
影响因子:
5.6
作者:
Galkin, VE;Orlova, A;Egelman, EH
通讯作者:
Egelman, EH