PKA-dependent dynein switching from lysosomes to adenovirus: a novel form of host-virus competition.

PKA-dependent dynein switching from lysosomes to adenovirus: a novel form of host-virus competition.
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DOI:
10.1083/jcb.201307116
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发表时间:
2014-04-28
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Vallee RB
Vallee RB
中科院分区:
其他
文献类型:
--
作者:
Scherer J;Yi J;Vallee RB

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PKA-mediated phosphorylation of a specific residue in the dynein light intermediate chain 1 releases the motor protein from lysosomes and late endosomes while activating its recruitment to adenovirus capsids. Cytoplasmic dynein is responsible for transport of several viruses to the nucleus. Adenovirus recruits dynein directly. Transport depends on virus-induced activation of protein kinase A (PKA) and other cellular protein kinases, whose roles in infection are poorly understood. We find that PKA phosphorylates cytoplasmic dynein at a novel site in light intermediate chain 1 (LIC1) that is essential for dynein binding to the hexon capsid subunit and for virus motility. Surprisingly, the same LIC1 modification induces a slow, but specific, dispersal of lysosomes (lyso)/late endosomes (LEs) that is mediated by inhibition of a newly identified LIC1 interaction with the RILP (Rab7-interacting lysosomal protein). These results identify an organelle-specific dynein regulatory modification that adenovirus uses for its own transport. PKA-mediated LIC1 phosphorylation causes only partial lyso/LE dispersal, suggesting a role for additional, parallel mechanisms for dynein recruitment to lyso/LEs. This arrangement provides a novel means to fine tune transport of these organelles in response to infection as well as to developmental and physiological cues.
腺病毒通过细胞质动力蛋白与病毒capsid己糖亚基的直接相互作用进行转运。
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