Specific association of retroviral envelope protein, p15E, with human cell surfaces.

Published

Journal Article

Experiments were carried out to analyze the binding sites on human cells for highly purified retroviral protein p15E isolated from Feline Leukemia Virus, Rickard Strain. Binding of 125I-labeled p15E was tested with surfaces of human peripheral blood lymphocytes and 3 cell lines, Raji, MOLT-4, and U-937. 125I-labeled p15E showed specific binding to human peripheral blood lymphocytes. In addition, all of the cell lines tested showed binding of 125I-labeled p15E. Using U-937 cells, we characterized the interaction between p15E and the surface of these cells, and showed that the binding was specific by the following 3 different sets of evidence: (i) in equilibrium binding experiments, 18,000 binding sites with a dissociation constant of 2 x 10(-9) M were present on U-937 cells; (ii) trypsin or N-glycanase treatment decreased the binding sites of 125I-labeled p15E; and (iii) by affinity chromatography using p15E or BSA Sepharose columns, the isolated membranes of 125I-labeled U-937 cells previously treated with Triton X-100 showed a significantly higher binding to the p15E column than to the BSA column.

Full Text

Duke Authors

Cited Authors

  • Kizaki, T; Mitani, M; Cianciolo, GJ; Ogasawara, M; Good, RA; Day, NK

Published Date

  • April 1991

Published In

Volume / Issue

  • 28 / 1

Start / End Page

  • 11 - 18

PubMed ID

  • 1649129

Pubmed Central ID

  • 1649129

International Standard Serial Number (ISSN)

  • 0165-2478

Digital Object Identifier (DOI)

  • 10.1016/0165-2478(91)90121-p

Language

  • eng

Conference Location

  • Netherlands