PMID- 6212079 OWN - NLM STAT- MEDLINE DCOM- 19820910 LR - 20190613 IS - 0006-2960 (Print) IS - 0006-2960 (Linking) VI - 21 IP - 9 DP - 1982 Apr 27 TI - Phosphorylation of the receptor of immunoglobulin E. PG - 2004-10 AB - Specific immune precipitation of immunoglobulin E(IgE)-receptor complexes from detergent extracts of 32P-labeled rat basophilic leukemia cells yielded a phosphoprotein of Mr approximately 35,000 on gel electrophoresis in sodium dodecyl sulfate. This phosphoprotein was shown by several criteria to be the beta chain of the receptor for IgE. Phosphorylation occurs at a serine residue (or residues) in a region (beta 2) of the beta chain that is thought to be exposed on the cytoplasmic face of the plasma membrane. Our results suggest that phosphorylation probably takes place after the insertion of the beta chain into the membrane. The IgE-binding alpha chain of the receptor and the IgE associated with it are not phosphorylated. We have so far been unable to detect any changes in the state of phosphorylation of either chain of the receptor or of IgE itself after IgE-mediated triggering of the cells. FAU - Fewtrell, C AU - Fewtrell C FAU - Davis, C L AU - Davis CL FAU - Metzger, H AU - Metzger H LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Biochemistry JT - Biochemistry JID - 0370623 RN - 0 (Cross-Linking Reagents) RN - 0 (Phosphoproteins) RN - 0 (Receptors, IgE) RN - 0 (Receptors, Immunologic) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Basophils MH - Cells, Cultured MH - Cross-Linking Reagents/pharmacology MH - *Immunoglobulin E MH - Leukemia, Experimental/immunology MH - Molecular Weight MH - Phosphoproteins/immunology MH - Phosphorylation MH - Rats MH - Receptors, IgE MH - Receptors, Immunologic/*metabolism EDAT- 1982/04/27 00:00 MHDA- 1982/04/27 00:01 CRDT- 1982/04/27 00:00 PHST- 1982/04/27 00:00 [pubmed] PHST- 1982/04/27 00:01 [medline] PHST- 1982/04/27 00:00 [entrez] AID - 10.1021/bi00538a005 [doi] PST - ppublish SO - Biochemistry. 1982 Apr 27;21(9):2004-10. doi: 10.1021/bi00538a005.