Work

A transcriptionally controlled trans-processing assay: putative identification of a vaccinia virus-encoded proteinase which cleaves precursor protein P25K

Year: 1994

Type: article

Abstract: Vaccinia virus maturation into infectious particles appears to be dependent on the proteolytic processing of at least five viral proteins, each containing a conserved AG*X cleavage motif and each requiring proper association with the previrion particle. To identify the responsible proteinase, a transcriptionally controlled trans-processing assay was developed to monitor cleavage at the permissive AG*S site of the P25K core protein precursor. This assay led to the putative identification of a VV proteinase encoded by open reading frame G1L. The predicted protein contains an HXXEH sequence which is a direct inversion of the active site consensus sequence present in thermolysin and other metalloendopeptidases. Site-directed mutation of this consensus sequence suggests that the G1L protein may be a novel, virus-encoded metalloendoproteinase, although confirmation of this activity must await the development of a suitable cell-free processing assay.

Source: Journal of Virology

DOI: 10.1128/jvi.68.11.7603-7608.1994

Authors: S S Whitehead, D E Hruby

Institution: Oregon State University

Language: English

Topic: Poxvirus research and outbreaks

Subfield: Virology

Field: Immunology and Microbiology

Domain: Life Sciences

Open Access status: bronze

Funders: National Institutes of Health, National Institute of Allergy and Infectious Diseases

Awards: PROTEOLYTIC MATURATION OF VACCINIA CORE POLYPEPTIDES, G745805503