PMID- 1318935 OWN - NLM STAT- MEDLINE DCOM- 19920721 LR - 20191028 IS - 0883-0185 (Print) IS - 0883-0185 (Linking) VI - 8 IP - 4 DP - 1992 TI - Endogenous ligands selecting T cells expressing particular V beta elements. PG - 289-309 AB - It has recently become clear that the minor lymphocyte stimulatory antigens (Mls) and other endogenous ligands which lead to the partial or total deletion of T cells bearing particular V beta segments are encoded by mouse mammary tumor virus (MMTV). We review here the genetic analyses of multiple V beta 11 and V beta 3 deletion ligands and demonstrate the involvement of MMTV in all examples. Several features of Mls and the V beta 11/V beta 3 deleting ligands identify them as members of the superantigen family. Bacterial superantigens are known to bind both MHC class II and the TCR in regions distinct from conventional peptide antigens. Within the MMTV genome, the 3' LTR has been identified as encoding superantigen function. We present data demonstrating that in vitro translation identifies the major product of the open reading frame (ORF) within the 3' LTR as a type II integral membrane glycoprotein. It is proposed that the type II membrane glycoprotein interacts with MHC and TCR in a manner analogous to the bacterial superantigens and distinct from conventional peptide antigen. Several unanswered questions regarding superantigen action remain; what determines total or partial deletion? How is Mls transferred between cells? These questions are addressed in the discussion. FAU - Tomonari, K AU - Tomonari K AD - Transplantation Biology Section, MRC Clinical Research Centre, Harrow, Middlesex, U.K. FAU - Fairchild, S AU - Fairchild S FAU - Rosenwasser, O A AU - Rosenwasser OA FAU - Robinson, P J AU - Robinson PJ FAU - Knight, A M AU - Knight AM FAU - Dyson, P J AU - Dyson PJ LA - eng PT - Journal Article PT - Review PL - England TA - Int Rev Immunol JT - International reviews of immunology JID - 8712260 RN - 0 (Ligands) RN - 0 (Membrane Glycoproteins) RN - 0 (Minor Lymphocyte Stimulatory Antigens) RN - 0 (Receptors, Antigen, T-Cell, alpha-beta) SB - IM MH - Animals MH - Chromosome Deletion MH - Ligands MH - Major Histocompatibility Complex/genetics MH - Mammary Tumor Virus, Mouse/genetics MH - Membrane Glycoproteins/genetics MH - Minor Lymphocyte Stimulatory Antigens/genetics MH - Open Reading Frames MH - Receptors, Antigen, T-Cell, alpha-beta/*genetics MH - Signal Transduction MH - T-Lymphocytes/*immunology RF - 71 EDAT- 1992/01/01 00:00 MHDA- 1992/01/01 00:01 CRDT- 1992/01/01 00:00 PHST- 1992/01/01 00:00 [pubmed] PHST- 1992/01/01 00:01 [medline] PHST- 1992/01/01 00:00 [entrez] AID - 10.3109/08830189209053514 [doi] PST - ppublish SO - Int Rev Immunol. 1992;8(4):289-309. doi: 10.3109/08830189209053514.