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.
复制标题

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
复制
发表时间:
2013-12-26
期刊:
影响因子:
5
通讯作者:
Martin JM
Martin JM
中科院分区:
医学3区
文献类型:
--
作者:
Wrobel CM;Geiger TR;Nix RN;Robitaille AM;Weigand S;Cervantes A;Gonzalez M;Martin JM

文献摘要

参考文献

被引文献

相似文献

LMP-1是由EB病毒编码的组成型活性肿瘤坏死因子受体类似物。LMP-1激活与寡聚化和筏定位相关,但LMP-1寡聚体的直接证据有限。我们报告说,LMP-1形成多个高分子量的天然LMP-1复合物时,通过BN-PAGE分析,其中最大的是在耐洗涤剂膜富集。这些高分子量复合物中最大的不是由纯化的LMP-1或LMP-1功能丧失突变体形成的。与这些结果一致,我们发现LMP-1的二聚体形式可以通过二硫化物交联来稳定。我们将LMP-1的C末端的半胱氨酸238鉴定为交联半胱氨酸。二硫化物交联发生在裂解后,但二聚体可以在完整细胞中与膜渗透性交联剂交联。LMP-1/C238 A保留野生型LMP-1 NF-κB活性。LMP-1的TRAF结合、筏缔合和寡聚化与LMP-1的二聚体形式相关。我们的研究结果表明,所观察到的二聚体物质的可能性,从相邻的核心LMP-1低聚物中的LMP-1分子的低聚物间交联的结果。
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.
DOI: 10.1128/jvi.61.3.866-875.1987
发表时间: 1987-03-01
影响因子: 5.4
作者:
BAICHWAL, VR;SUGDEN, B
通讯作者: SUGDEN, B
DOI: 10.1038/sj.onc.1201359
发表时间: 1997-10-09
期刊: ONCOGENE
影响因子: 8
作者:
Floettmann, JE;Rowe, M
通讯作者: Rowe, M
DOI: 10.4049/jimmunol.166.6.3693
发表时间: 2001-03-15
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
DOI: 10.1111/j.1365-3083.2006.01700.x
发表时间: 2006-01-01
影响因子: 3.7
作者:
Eren, E;Yates, J;Lombardi, G
通讯作者: Lombardi, G