6FDL image
Entry Detail
PDB ID:
6FDL
Keywords:
Title:
Crystal structure of the NYN domain of human MARF1
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2017-12-26
Release Date:
2018-11-07
Method Details:
Experimental Method:
Resolution:
1.75 Å
R-Value Free:
0.21
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 43 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Meiosis regulator and mRNA stability factor 1
Mutations:I39M, L457M
Chain IDs:A, B
Chain Length:160
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
Human MARF1 is an endoribonuclease that interacts with the DCP1:2 decapping complex and degrades target mRNAs.
Nucleic Acids Res. 46 12008 12021 (2018)
PMID: 30364987 DOI: 10.1093/nar/gky1011

Abstact

Meiosis arrest female 1 (MARF1) is a cytoplasmic RNA binding protein that is essential for meiotic progression of mouse oocytes, in part by limiting retrotransposon expression. MARF1 is also expressed in somatic cells and tissues; however, its mechanism of action has yet to be investigated. Human MARF1 contains a NYN-like domain, two RRMs and eight LOTUS domains. Here we provide evidence that MARF1 post-transcriptionally silences targeted mRNAs. MARF1 physically interacts with the DCP1:DCP2 mRNA decapping complex but not with deadenylation machineries. Importantly, we provide a 1.7 Å resolution crystal structure of the human MARF1 NYN domain, which we demonstrate is a bona fide endoribonuclease, the activity of which is essential for the repression of MARF1-targeted mRNAs. Thus, MARF1 post-transcriptionally represses gene expression by serving as both an endoribonuclease and as a platform that recruits the DCP1:DCP2 decapping complex to targeted mRNAs.

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