Work

Murine leukemia virus protease is encoded by the gag-pol gene and is synthesized through suppression of an amber termination codon.

Year: 1985

Type: article

Abstract: We have purified from Moloney murine leukemia virus (Mo-MuLV) a protease that has the capacity of accurately cleaving the polyprotein precursor Pr65gag into the mature viral structural proteins. Both the NH2- and COOH-terminal amino acid sequences have been determined and aligned with the amino acid sequence deduced from the DNA sequence of Mo-MuLV by other workers. The results show that: (i) the protease is located at the 5' end of the pol gene, and the first four amino acids are overlapped with the 3' end of the gag gene; (ii) the fifth amino acid residue is glutamine, which is inserted by suppression of the UAG termination codon at the gag-pol junction; and (iii) the protease is composed of 125 amino acids with calculated Mr = 13,315, and the COOH terminus of the protease is adjacent to the NH2 terminus of reverse transcriptase. The map order of the gag-pol gene is proposed to be 5'-p15-p12-p30-p10-protease-reverse transcriptase-endonuclease-3'.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.82.6.1618

Authors: Y Yoshinaka, I Katoh, T D Copeland, S Oroszlan

Institutions: Frederick National Laboratory for Cancer Research, National Cancer Institute

Language: English

Topic: T-cell and Retrovirus Studies

Subfield: Immunology

Field: Immunology and Microbiology

Domain: Life Sciences

Open Access status: green

Funders: U.S. Public Health Service, National Cancer Institute

Award: G398599575