Secondary Structure Model of the Mason-Pfizer Monkey Virus 5' Leader Sequence: Identification of a Structural Motif Common to a Variety of Retroviruses

Overview

Journal J Virol

Publisher American Society for Microbiology

Date 1995 Apr 1

PMID 7884866

Citations 18

Authors

G P Harrison

E Hunter

A M Lever

Affiliations

Soon will be listed here.

Abstract

A stable secondary structure model is presented for the region 3' of the primer-binding site to 130 bases into the gag sequence of the prototype type D retrovirus Mason-Pfizer monkey virus. Using biochemical probing of RNA from this region in association with free energy minimization, we have identified a stem-loop structure in the region, which from other studies has been shown to be important for genomic RNA encapsidation. The structure involves a highly stable stem of five G-C pairs terminating in a heptaloop. Comparison of the Mason-Pfizer monkey virus structure with one predicted for squirrel monkey retrovirus demonstrates an identical stem and a common ACC motif in the loop. Free energy studies of the secondary structure of the 5' regions of eight other retroviruses predict stem loops which have similar GAYC motifs. We believe this may represent a common structural and sequence motif which among other functions may be involved in genomic RNA packaging in these viruses.

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