4J8S image
Entry Detail
PDB ID:
4J8S
Keywords:
Title:
Crystal structure of human CNOT1 MIF4G domain in complex with a TTP peptide
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2013-02-14
Release Date:
2013-05-08
Method Details:
Experimental Method:
Resolution:
1.55 Å
R-Value Free:
0.18
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 21 3
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:CCR4-NOT transcription complex subunit 1
Chain IDs:A
Chain Length:203
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Tristetraprolin
Chain IDs:B
Chain Length:15
Number of Molecules:1
Biological Source:HOMO SAPIENS
Primary Citation
Structural basis for the recruitment of the human CCR4-NOT deadenylase complex by tristetraprolin.
Nat.Struct.Mol.Biol. 20 735 739 (2013)
PMID: 23644599 DOI: 10.1038/nsmb.2572

Abstact

Tristetraprolin (TTP) is an RNA-binding protein that controls the inflammatory response by limiting the expression of several proinflammatory cytokines. TTP post-transcriptionally represses gene expression by interacting with AU-rich elements (AREs) in 3' untranslated regions of target mRNAs and subsequently engenders their deadenylation and decay. TTP accomplishes these tasks, at least in part, by recruiting the multisubunit CCR4-NOT deadenylase complex to the mRNA. Here we identify an evolutionarily conserved C-terminal motif in human TTP that directly binds a central domain of CNOT1, a core subunit of the CCR4-NOT complex. A high-resolution crystal structure of the TTP-CNOT1 complex was determined, providing the first structural insight, to our knowledge, into an ARE-binding protein bound to the CCR4-NOT complex. Mutations at the CNOT1-TTP interface impair TTP-mediated deadenylation, demonstrating the significance of this interaction in TTP-mediated gene silencing.

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