PMID- 10187853 OWN - NLM STAT- MEDLINE DCOM- 19990503 LR - 20210209 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 274 IP - 15 DP - 1999 Apr 9 TI - Cell surface retention sequence binding protein-1 interacts with the v-sis gene product and platelet-derived growth factor beta-type receptor in simian sarcoma virus-transformed cells. PG - 10582-9 AB - The cell surface retention sequence (CRS) binding protein-1 (CRSBP-1) is a newly identified membrane glycoprotein which is hypothesized to be responsible for cell surface retention of the oncogene v-sis and c-sis gene products and other secretory proteins containing CRSs. In simian sarcoma virus-transformed NIH 3T3 cells (SSV-NIH 3T3 cells), a fraction of CRSBP-1 was demonstrated at the cell surface and underwent internalization/recycling as revealed by cell surface 125I labeling and its resistance/sensitivity to trypsin digestion. However, the majority of CRSBP-1 was localized in intracellular compartments as evidenced by the resistance of most of the 35S-metabolically labeled CRSBP-1 to trypsin digestion, and by indirect immunofluorescent staining. CRSBP-1 appeared to form complexes with proteolytically processed forms (generated at and/or after the trans-Golgi network) of the v-sis gene product and with a approximately 140-kDa proteolytically cleaved form of the platelet-derived growth factor (PDGF) beta-type receptor, as demonstrated by metabolic labeling and co-immunoprecipitation. CRSBP-1, like the v-sis gene product and PDGF beta-type receptor, underwent rapid turnover which was blocked in the presence of 100 microM suramin. In normal and other transformed NIH 3T3 cells, CRSBP-1 was relatively stable and did not undergo rapid turnover and internalization/recycling at the cell surface. These results suggest that in SSV-NIH 3T3 cells, CRSBP-1 interacts with and forms ternary and binary complexes with the newly synthesized v-sis gene product and PDGF beta-type receptor at the trans-Golgi network and that the stable binary (CRSBP-1.v-sis gene product) complex is transported to the cell surface where it presents the v-sis gene product to unoccupied PDGF beta-type receptors during internalization/recycling. FAU - Boensch, C AU - Boensch C AD - Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, St. Louis, Missouri 63104, USA. FAU - Huang, S S AU - Huang SS FAU - Connolly, D T AU - Connolly DT FAU - Huang, J S AU - Huang JS LA - eng GR - CA38808/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Membrane Proteins) RN - 0 (Oncogene Proteins v-sis) RN - 0 (Retroviridae Proteins, Oncogenic) RN - 0 (cell-surface retention-binding protein 1) RN - 6032D45BEM (Suramin) RN - EC 2.7.10.1 (Receptor, Platelet-Derived Growth Factor beta) RN - EC 2.7.10.1 (Receptors, Platelet-Derived Growth Factor) RN - EC 3.4.21.4 (Trypsin) SB - IM MH - 3T3 Cells MH - Animals MH - *Cell Transformation, Viral MH - Fluorescent Antibody Technique, Indirect MH - Membrane Proteins/*metabolism MH - Mice MH - Oncogene Proteins v-sis MH - Rabbits MH - Receptor, Platelet-Derived Growth Factor beta MH - Receptors, Platelet-Derived Growth Factor/*metabolism MH - Retroviridae Proteins, Oncogenic/*metabolism MH - Sarcoma Virus, Woolly Monkey/*metabolism MH - Suramin/metabolism MH - Surface Properties MH - Trypsin/metabolism EDAT- 1999/04/03 00:00 MHDA- 1999/04/03 00:01 CRDT- 1999/04/03 00:00 PHST- 1999/04/03 00:00 [pubmed] PHST- 1999/04/03 00:01 [medline] PHST- 1999/04/03 00:00 [entrez] AID - 10.1074/jbc.274.15.10582 [doi] AID - S0021-9258(19)73751-X [pii] PST - ppublish SO - J Biol Chem. 1999 Apr 9;274(15):10582-9. doi: 10.1074/jbc.274.15.10582.