PMID- 16181343 OWN - NLM STAT- MEDLINE DCOM- 20051114 LR - 20050926 IS - 0105-2896 (Print) IS - 0105-2896 (Linking) VI - 207 DP - 2005 Oct TI - Right place, right time, right peptide: DO keeps DM focused. PG - 279-92 AB - Peptide loading of major histocompatibility class II molecules is catalyzed in late endosomal and lysosomal compartments of cells by the catalytic action of human leukocyte antigen (HLA)-DM (H-2M in mice). In B cells, dendritic cells and thymic epithelial cells, the peptide loading of class II molecules is modified by the expression of the non-classical class II molecule, HLA-DO (H-2O in mice). Collectively, studies to date support that DO/H-2O expression inhibits the presentation of antigens acquired by cells via fluid phase endocytosis. However, in B cells, the expression of H-2O promotes the presentation of antigens internalized by the B-cell receptor. In this review, we summarize the literature pertaining to DO assembly, transport, and function, with an emphasis on the function of DO/H-2O. FAU - Denzin, Lisa K AU - Denzin LK AD - Sloan-Kettering Institute, Immunology Program, Memorial Sloan-Kettering Cancer Center, NY 10021, USA. denzinl@mskcc.org FAU - Fallas, Jennifer L AU - Fallas JL FAU - Prendes, Maria AU - Prendes M FAU - Yi, Woelsung AU - Yi W LA - eng PT - Journal Article PT - Review PL - England TA - Immunol Rev JT - Immunological reviews JID - 7702118 RN - 0 (HLA-D Antigens) RN - 0 (Peptides) SB - IM MH - Animals MH - Antigen Presentation/*immunology MH - B-Lymphocytes/cytology/immunology MH - Cell Differentiation/immunology MH - HLA-D Antigens/*immunology/metabolism MH - Humans MH - Lymphocyte Activation/immunology MH - Peptides/*immunology/metabolism RF - 120 EDAT- 2005/09/27 09:00 MHDA- 2005/11/15 09:00 CRDT- 2005/09/27 09:00 PHST- 2005/09/27 09:00 [pubmed] PHST- 2005/11/15 09:00 [medline] PHST- 2005/09/27 09:00 [entrez] AID - IMR302 [pii] AID - 10.1111/j.0105-2896.2005.00302.x [doi] PST - ppublish SO - Immunol Rev. 2005 Oct;207:279-92. doi: 10.1111/j.0105-2896.2005.00302.x.