Molecular discrimination of structurally equivalent Lys 63‐linked and linear polyubiquitin chains
نویسندگان
چکیده
منابع مشابه
Molecular discrimination of structurally equivalent Lys 63-linked and linear polyubiquitin chains.
At least eight types of ubiquitin chain exist, and individual linkages affect distinct cellular processes. The only distinguishing feature of differently linked ubiquitin chains is their structure, as polymers of the same unit are chemically identical. Here, we have crystallized Lys 63-linked and linear ubiquitin dimers, revealing that both adopt equivalent open conformations, forming no contac...
متن کاملStructural basis for specific recognition of Lys 63-linked polyubiquitin chains by tandem UIMs of RAP80.
RAP80 has a key role in the recruitment of the Abraxas-BRCC36-BRCA1-BARD1 complex to DNA-damage foci for DNA repair through specific recognition of Lys 63-linked polyubiquitinated proteins by its tandem ubiquitin-interacting motifs (UIMs). Here, we report the crystal structure of the RAP80 tandem UIMs (RAP80-UIM1-UIM2) in complex with Lys 63-linked di-ubiquitin at 2.2 A resolution. The two UIMs...
متن کاملA ubiquitin ligase complex assembles linear polyubiquitin chains.
The ubiquitin system plays important roles in the regulation of numerous cellular processes by conjugating ubiquitin to target proteins. In most cases, conjugation of polyubiquitin to target proteins regulates their function. In the polyubiquitin chains reported to date, ubiquitin monomers are linked via isopeptide bonds between an internal Lys and a C-terminal Gly. Here, we report that a prote...
متن کاملNew conformations of linear polyubiquitin chains from crystallographic and solution-scattering studies expand the conformational space of polyubiquitin.
The conformational flexibility of linkage-specific polyubiquitin chains enables ubiquitylated proteins and their receptors to be involved in a variety of cellular processes. Linear or Met1-linked polyubiquitin chains, associated with nondegradational cellular signalling pathways, have been known to adopt multiple conformations from compact to extended conformations. However, the extent of such ...
متن کاملStructural basis for specific recognition of Lys 63-linked polyubiquitin chains by NZF domains of TAB2 and TAB3.
TAB2 and TAB3 activate the Jun N-terminal kinase and nuclear factor-kappaB pathways through the specific recognition of Lys 63-linked polyubiquitin chains by its Npl4 zinc-finger (NZF) domain. Here we report crystal structures of the TAB2 and TAB3 NZF domains in complex with Lys 63-linked diubiquitin at 1.18 and 1.40 A resolutions, respectively. Both NZF domains bind to the distal ubiquitin thr...
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ژورنال
عنوان ژورنال: EMBO reports
سال: 2009
ISSN: 1469-221X,1469-3178
DOI: 10.1038/embor.2009.106