High molecular weight complex analysis of Epstein-Barr virus Latent Membrane Protein 1 (LMP-1): structural insights into LMP-1's homo-oligomerization and lipid raft association.
High molecular weight complex analysis of Epstein-Barr virus Latent Membrane Protein 1 (LMP-1): structural insights into LMP-1's homo-oligomerization and lipid raft association.
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Epstein-Barr病毒潜在膜蛋白1(LMP-1)的高分子量复杂分析:对LMP-1的同性恋和脂质筏关联的结构见解。
DOI:
10.1016/j.virusres.2013.09.025
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发表时间:
2013-12-26
期刊:
影响因子:
5
通讯作者:
Martin JM
中科院分区:
文献类型:
--
作者:
Wrobel CM;Geiger TR;Nix RN;Robitaille AM;Weigand S;Cervantes A;Gonzalez M;Martin JM
LMP-1 is a constitutively active Tumor Necrosis Factor Receptor analog encoded by Epstein-Barr virus. LMP-1 activation correlates with oligomerization and raft localization, but direct evidence of LMP-1 oligomers is limited. We report that LMP-1 forms multiple high molecular weight native LMP-1 complexes when analyzed by BN-PAGE, the largest of which are enriched in detergent resistant membranes. The largest of these high molecular weight complexes are not formed by purified LMP-1 or by loss of function LMP-1 mutants. Consistent with these results we find a dimeric form of LMP-1 that can be stabilized by disulfide crosslinking. We identify cysteine 238 in the C-terminus of LMP-1 as the crosslinked cysteine. Disulfide crosslinking occurs post-lysis but the dimer can be crosslinked in intact cells with membrane permeable crosslinkers. LMP-1/C238A retains wild type LMP-1 NF-κB activity. LMP-1’s TRAF binding, raft association and oligomerization are associated with the dimeric form of LMP-1. Our results suggest the possibility that the observed dimeric species results from inter-oligomeric crosslinking of LMP-1 molecules in adjacent core LMP-1 oligomers.
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影响因子:
5.4
作者:
BAICHWAL, VR;SUGDEN, B
通讯作者:
SUGDEN, B
影响因子:
8
作者:
Floettmann, JE;Rowe, M
通讯作者:
Rowe, M
影响因子:
4.4
作者:
Cheng, PC;Brown, BK;Pierce, SK
通讯作者:
Pierce, SK
DOI:
10.1073/pnas.81.23.7632
发表时间:
1984-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
DAMBAUGH, T;HENNESSY, K;KIEFF, E
通讯作者:
KIEFF, E
影响因子:
3.7
作者:
Eren, E;Yates, J;Lombardi, G
通讯作者:
Lombardi, G