CryoEM structure of MxB reveals a novel oligomerization interface critical for HIV restriction.
CryoEM structure of MxB reveals a novel oligomerization interface critical for HIV restriction.
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DOI:
10.1126/sciadv.1701264
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发表时间:
2017-09
期刊:
影响因子:
13.6
通讯作者:
Zhang P
中科院分区:
文献类型:
--
作者:
Alvarez FJD;He S;Perilla JR;Jang S;Schulten K;Engelman AN;Scheres SHW;Zhang P
CryoEM structure of MxB tubes at 4.6 Å resolution reveals novel interfaces responsible for assembly and anti–HIV-1 activity. Human dynamin–like, interferon-induced myxovirus resistance 2 (Mx2 or MxB) is a potent HIV-1 inhibitor. Antiviral activity requires both the amino-terminal region of MxB and protein oligomerization, each of which has eluded structural determination due to difficulties in protein preparation. We report that maltose binding protein–fused, full-length wild-type MxB purifies as oligomers and further self-assembles into helical arrays in physiological salt. Guanosine triphosphate (GTP), but not guanosine diphosphate, binding results in array disassembly, whereas subsequent GTP hydrolysis allows its reformation. Using cryo-electron microscopy (cryoEM), we determined the MxB assembly structure at 4.6 Å resolution, representing the first near-atomic resolution structure in the mammalian dynamin superfamily. The structure revealed previously described and novel MxB assembly interfaces. Mutational analyses demonstrated a critical role for one of the novel interfaces in HIV-1 restriction.
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影响因子:
5.7
作者:
Chan, Kwok-Yan;Gumbart, James;McGreevy, Ryan;Watermeyer, Jean M.;Sewell, B. Trevor;Schulten, Klaus
通讯作者:
Schulten, Klaus
影响因子:
5.3
作者:
AEBI, M;FAH, J;STAEHELI, P
通讯作者:
STAEHELI, P
DOI:
10.1073/pnas.0403167101
发表时间:
2004-06-15
影响因子:
11.1
作者:
King, MC;Raposo, G;Lemmon, MA
通讯作者:
Lemmon, MA
影响因子:
3.1
作者:
Kong, Jia;Ma, Min;Qin, Xiaohong
通讯作者:
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影响因子:
5.5
作者:
Best, Robert B.;Zhu, Xiao;Shim, Jihyun;Lopes, Pedro E. M.;Mittal, Jeetain;Feig, Michael;MacKerell, Alexander D., Jr.
通讯作者:
MacKerell, Alexander D., Jr.