Dynamical view of membrane binding and complex formation of human factor VIIa and tissue factor.
Dynamical view of membrane binding and complex formation of human factor VIIa and tissue factor.
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DOI:
10.1111/j.1538-7836.2010.03826.x
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发表时间:
2010-05
期刊:
影响因子:
--
通讯作者:
Tajkhorshid E
中科院分区:
文献类型:
--
作者:
Ohkubo YZ;Morrissey JH;Tajkhorshid E
The molecular mechanism of enhancement of the enzymatic activity of factor VIIa (FVIIa) by tissue factor (TF) is not fully understood, primarily due to the lack of atomic models for the membrane-bound form of the TF:FVIIa complex. To construct the first membrane-bound model of the TF:FVIIa complex and to investigate the dynamics of the complex in solution and on the surface of anionic membranes using large-scale molecular dynamics (MD) simulations in full atomic detail. Membrane-bound models of the TF:FVIIa complex and the individual factors were constructed and subjected to MD simulations, in order to characterize protein-protein and protein-lipid interactions and to investigate the dynamics of TF and FVIIa. The MD trajectories reveal that isolated FVIIa undergoes large structural fluctuation primarily due to the hinge motions between its domains, while sTF is structurally stable. Upon complex formation, sTF restricts the motion of FVIIa significantly. The results also show that, in the membrane-bound form, sTF directly interacts with the lipid head groups, even in the absence of FVIIa. The first atomic models of membrane-bound sTF:FVIIa, FVIIa, and sTF are presented, revealing sTF direct contacts with the lipids, both in the isolated form and in complex with FVIIa. The main effect of sTF binding to FVIIa is spatial stabilization of the catalytic site of FVIIa, which ensures optimal interaction with the substrate, factor X.
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影响因子:
4.8
作者:
Huang, MD;Furie, BC;Furie, B
通讯作者:
Furie, B
影响因子:
2.9
作者:
Kirchhofer, D;Lipari, MT;Kelley, RF
通讯作者:
Kelley, RF
DOI:
10.1046/j.1432-1033.2003.03625.x
发表时间:
2003-06-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
Carlsson, K;Freskgård, PO;Svensson, M
通讯作者:
Svensson, M
影响因子:
64.8
作者:
HARLOS, K;MARTIN, DMA;BOYS, CWG
通讯作者:
BOYS, CWG
影响因子:
4.4
作者:
FELLER, SE;ZHANG, YH;BROOKS, BR
通讯作者:
BROOKS, BR