2c39

From Proteopedia

Revision as of 11:43, 5 November 2007

RNASE PH CORE OF THE ARCHAEAL EXOSOME IN COMPLEX WITH ADP

Overview

The exosome is a macromolecular complex that plays fundamental roles in, the biogenesis and turnover of a large number of RNA species. Here we, report the crystal structures of the Rrp41-Rrp42 core complex of the S., solfataricus exosome bound to short single-stranded RNAs and to ADP. The, RNA binding cleft recognizes four nucleotides in a sequence-unspecific, manner, mainly by electrostatic interactions with the phosphate groups., Interactions at the 2' hydroxyls of the sugars provide specificity for RNA, over DNA. The structures show both the bound substrate and the cleaved, product of the reaction, suggesting a catalytic mechanism for the 3'-5', phosphorolytic activity of the exosome.

About this Structure

2C39 is a Protein complex structure of sequences from Sulfolobus solfataricus with ADP as ligand. Structure known Active Site: AC1. Full crystallographic information is available from OCA.

Reference

Structural basis of 3' end RNA recognition and exoribonucleolytic cleavage by an exosome RNase PH core., Lorentzen E, Conti E, Mol Cell. 2005 Nov 11;20(3):473-81. PMID:16285928

Page seeded by OCA on Mon Nov 5 13:48:34 2007