3JSB image
Deposition Date 2009-09-10
Release Date 2010-09-15
Last Version Date 2024-03-20
Entry Detail
PDB ID:
3JSB
Title:
Crystal structure of the N-terminal domain of the Lymphocytic Choriomeningitis Virus L protein
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.13 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:RNA-directed RNA polymerase
Gene (Uniprot):L
Mutations:S107T, N173D
Chain IDs:A, B
Chain Length:204
Number of Molecules:2
Biological Source:Lymphocytic choriomeningitis virus
Primary Citation
The N-terminal domain of the arenavirus L protein is an RNA endonuclease essential in mRNA transcription
Plos Pathog. 6 e1001038 e1001038 (2010)
PMID: 20862324 DOI: 10.1371/journal.ppat.1001038

Abstact

Arenaviridae synthesize viral mRNAs using short capped primers presumably acquired from cellular transcripts by a 'cap-snatching' mechanism. Here, we report the crystal structure and functional characterization of the N-terminal 196 residues (NL1) of the L protein from the prototypic arenavirus: lymphocytic choriomeningitis virus. The NL1 domain is able to bind and cleave RNA. The 2.13 Å resolution crystal structure of NL1 reveals a type II endonuclease α/β architecture similar to the N-terminal end of the influenza virus PA protein. Superimposition of both structures, mutagenesis and reverse genetics studies reveal a unique spatial arrangement of key active site residues related to the PD…(D/E)XK type II endonuclease signature sequence. We show that this endonuclease domain is conserved and active across the virus families Arenaviridae, Bunyaviridae and Orthomyxoviridae and propose that the arenavirus NL1 domain is the Arenaviridae cap-snatching endonuclease.

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Primary Citation of related structures