Water dynamics at the binding interface of four different HLA-A2-peptide complexes.
Water dynamics at the binding interface of four different HLA-A2-peptide complexes.
复制标题
四种不同 HLA-A2-肽复合物结合界面的水动力学。
DOI:
10.1093/intimm/12.7.949
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发表时间:
2000
影响因子:
4.4
通讯作者:
Haworth,IS
中科院分区:
文献类型:
--
作者:
Meng,WS;vonGrafenstein,H;Haworth,IS
Because only a limited number of MHC molecules are available for presentation of a large number of peptides, each of these MHC molecules must be able to bind promiscuously many different peptides at an affinity sufficient for stable presentation. Here we show, for the MHC molecule HLA-A2, that this ability may be facilitated by a flexible water network that forms an interface between the MHC molecule and the peptide. Using the SURFNET program we have computed the `gaps' present in the peptide-binding groove in the X-ray structures of complexes of HLA-A2 with four different bound peptides. The volume of these gaps increases with increasing peptide hydrophilicity. Using molecular dynamics simulations, we show that the water molecules in the binding groove of complexes of HLA-A2 with the more hydrophilic peptides are largely disordered, but a number of defined water-binding sites are also discernable. Conversely, for complexes of HLA-A2 with the more hydrophobic peptides, the water molecules are more rigidly bound at the MHC–peptide interface and a number of well-defined water-binding sites exist. However, even these well-defined sites may not be permanently occupied by the same water molecule and in the dynamics calculations we observed exchange of water molecules between such sites.
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影响因子:
29.7
作者:
and A Townsend;H. Bodmer
通讯作者:
H. Bodmer
影响因子:
64.5
作者:
Billeter, M;Guntert, P;Wuthrich, K
通讯作者:
Wuthrich, K
DOI:
10.1073/pnas.92.7.2479
发表时间:
1995-03-28
影响因子:
11.1
作者:
FREMONT, DH;STURA, EA;WILSON, IA
通讯作者:
WILSON, IA
影响因子:
4.4
作者:
D. Madden;D. Garboczi;D. Wiley
通讯作者:
D. Wiley
影响因子:
32.4
作者:
Ding, YH;Baker, BM;Wiley, DC
通讯作者:
Wiley, DC