PMID- 3485855 OWN - NLM STAT- MEDLINE DCOM- 19860507 LR - 20190714 IS - 0042-6822 (Print) IS - 0042-6822 (Linking) VI - 150 IP - 2 DP - 1986 Apr 30 TI - Polypeptides of Mason-Pfizer monkey virus. III. Translational order of proteins on the gag and env gene specified precursor polypeptides. PG - 503-8 AB - Mason-Pfizer monkey virus (M-PMV), the prototype D-type retrovirus, unlike most retroviruses, preassembles core structures in the cytoplasm of infected cells during morphogenesis. We have shown previously (J. Bradac and E. Hunter, 1984, Virology 138, 260-275) that M-PMV virions contain 5 gag-encoded polypeptides. In this report, the translational order of the proteins encoded on the gag and env genes of M-PMV has been determined by pactamycin mapping. The proposed order of the viral proteins on their respective precursors is env: NH2-gp85-gp20-COOH; gag: NH2-p10-pp24/pp16-p12-p27-p14-COOH. Myristic acid-labeled virions contained a single radioactive protein, p10, supporting the mapping of this molecule to the amino terminus. From these studies it is clear that M-PMV contains an unusual additional gag polypeptide, p12, for which no function has been assigned to date. A remarkable similarity exists in the size and organization of M-PMV and mouse mammary tumor virus (MMTV) gag polypeptides; suggesting a common ancestor to these two viruses. FAU - Bradac, J A AU - Bradac JA FAU - Hunter, E AU - Hunter E LA - eng GR - CA 00685/CA/NCI NIH HHS/United States GR - CA 09202/CA/NCI NIH HHS/United States GR - CA 27834/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Virology JT - Virology JID - 0110674 RN - 0 (Protein Precursors) RN - 0 (Viral Proteins) RN - 23668-11-3 (Pactamycin) SB - IM MH - Animals MH - *Genes, Viral MH - Macaca mulatta MH - Pactamycin/pharmacology MH - *Peptide Biosynthesis MH - *Protein Biosynthesis MH - Protein Precursors/biosynthesis/*genetics MH - Retroviridae/*genetics/metabolism MH - Viral Proteins/*biosynthesis/genetics EDAT- 1986/04/30 00:00 MHDA- 1986/04/30 00:01 CRDT- 1986/04/30 00:00 PHST- 1986/04/30 00:00 [pubmed] PHST- 1986/04/30 00:01 [medline] PHST- 1986/04/30 00:00 [entrez] AID - 10.1016/0042-6822(86)90314-4 [doi] PST - ppublish SO - Virology. 1986 Apr 30;150(2):503-8. doi: 10.1016/0042-6822(86)90314-4.