PMID- 15485859 OWN - NLM STAT- MEDLINE DCOM- 20050204 LR - 20210206 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 279 IP - 51 DP - 2004 Dec 17 TI - Role of tumor necrosis factor (TNF) receptor-associated factor 2 (TRAF2) in distinct and overlapping CD40 and TNF receptor 2/CD120b-mediated B lymphocyte activation. PG - 53222-31 AB - Members of the tumor necrosis factor receptor (TNFR) family play a variety of roles in the regulation of lymphocyte activation. An important TNFR family member for B cell activation is CD40. CD40 signals stimulate B cell TNF-alpha secretion, which subsequently signals via TNFR2 (CD120b) to enhance B cell activation. Although the function of the pro-apoptotic and pro-inflammatory receptor TNFR1 (CD120a) has been the subject of much research, less is understood about the distinct contributions of CD120b to cell activation and how it stimulates downstream events. Members of the tumor necrosis factor receptor family bind various members of the cytoplasmic adapter protein family, the tumor necrosis factor receptor-associated factors (TRAFs), during signaling. Both CD40 and CD120b bind TNF receptor-associated factor 2 (TRAF2) upon ligand stimulation. Wild type and TRAF2-deficient B cells expressing CD40 or the hybrid molecule (human) CD40 (mouse)-CD120b were examined. CD40- and CD120b-mediated IgM secretion were partly TRAF2-dependent, but only CD40 required TRAF2 for c-Jun N-terminal kinase activation. CD40 and CD120b used primarily divergent mechanisms to activate NF-kappaB, exemplifying how TNFR family members can use diverse mechanisms to mediate similar downstream events. FAU - Munroe, Melissa E AU - Munroe ME AD - Department of Microbiology, The University of Iowa and Veterans Affairs Medical Center, Iowa City, IA 52242, USA. FAU - Bishop, Gail A AU - Bishop GA LA - eng GR - AI07260/AI/NIAID NIH HHS/United States GR - AI07343/AI/NIAID NIH HHS/United States GR - AI28847/AI/NIAID NIH HHS/United States GR - AI49993/AI/NIAID NIH HHS/United States GR - CA099997/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. DEP - 20041012 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Antibodies) RN - 0 (Antibodies, Monoclonal) RN - 0 (CD40 Antigens) RN - 0 (Detergents) RN - 0 (Immunoglobulin M) RN - 0 (Ligands) RN - 0 (NF-kappa B) RN - 0 (NF-kappa B p52 Subunit) RN - 0 (PSIP1 protein, human) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Psip1 protein, mouse) RN - 0 (RELB protein, human) RN - 0 (Receptors, Tumor Necrosis Factor, Type II) RN - 0 (Relb protein, mouse) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Trans-Activators) RN - 0 (Transcription Factors) RN - 147337-75-5 (Transcription Factor RelB) RN - EC 1.13.12.- (Luciferases) RN - EC 2.7.11.24 (JNK Mitogen-Activated Protein Kinases) RN - EC 2.7.12.2 (MAP Kinase Kinase 4) RN - EC 2.7.12.2 (Mitogen-Activated Protein Kinase Kinases) SB - IM MH - Active Transport, Cell Nucleus MH - Adaptor Proteins, Signal Transducing MH - Animals MH - Antibodies/chemistry MH - Antibodies, Monoclonal/chemistry MH - Apoptosis MH - B-Lymphocytes/*metabolism MH - CD40 Antigens/*biosynthesis MH - Cell Line MH - Cytoplasm/metabolism MH - Detergents/pharmacology MH - Enzyme Activation MH - Humans MH - Immunoglobulin M/chemistry MH - JNK Mitogen-Activated Protein Kinases/metabolism MH - Kinetics MH - Ligands MH - Luciferases/metabolism MH - Lymphocyte Activation MH - MAP Kinase Kinase 4 MH - Mice MH - Mitogen-Activated Protein Kinase Kinases/metabolism MH - Models, Biological MH - NF-kappa B/metabolism MH - NF-kappa B p52 Subunit MH - Phosphorylation MH - Protein Binding MH - Protein Structure, Tertiary MH - Proto-Oncogene Proteins/metabolism MH - Receptors, Tumor Necrosis Factor, Type II/*biosynthesis MH - Signal Transduction MH - TNF Receptor-Associated Factor 2/*metabolism MH - Time Factors MH - Trans-Activators/metabolism MH - Transcription Factor RelB MH - Transcription Factors/metabolism MH - Transcriptional Activation MH - Transfection EDAT- 2004/10/16 09:00 MHDA- 2005/02/05 09:00 CRDT- 2004/10/16 09:00 PHST- 2004/10/16 09:00 [pubmed] PHST- 2005/02/05 09:00 [medline] PHST- 2004/10/16 09:00 [entrez] AID - S0021-9258(18)81960-3 [pii] AID - 10.1074/jbc.M410539200 [doi] PST - ppublish SO - J Biol Chem. 2004 Dec 17;279(51):53222-31. doi: 10.1074/jbc.M410539200. Epub 2004 Oct 12.