Publication Date:
1995-03-10
Description:
CD40 is a receptor on the surface of B lymphocytes, the activation of which leads to B cell survival, growth, and differentiation. A yeast two-hybrid screen identified a gene, CRAF1, encoding a protein that interacts directly with the CD40 cytoplasmic tail through a region of similarity to the tumor necrosis factor-alpha (TNF-alpha) receptor-associated factors. Overexpression of a truncated CRAF1 gene inhibited CD40-mediated up-regulation of CD23. A region of CRAF1 was similar to the TNF-alpha receptor-associated factors TRAF1 and TRAF2 and so defined a shared TRAF-C domain that was necessary and sufficient for CD40 binding and homodimerization. The CRAF1 sequence also predicted a long amphipathic helix, a pattern of five zinc fingers, and a zinc ring finger. It is likely that other members of the TNF receptor superfamily use CRAF-related proteins in their signal transduction processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, G -- Cleary, A M -- Ye, Z S -- Hong, D I -- Lederman, S -- Baltimore, D -- 5-T32-GM07367/GM/NIGMS NIH HHS/ -- A122346/PHS HHS/ -- R01-CA55713/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1995 Mar 10;267(5203):1494-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7533327" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acid Sequence
;
Animals
;
Antigens, CD/*metabolism
;
Antigens, CD40
;
Antigens, Differentiation, B-Lymphocyte/*metabolism
;
Humans
;
Mice
;
Molecular Sequence Data
;
Protein Structure, Secondary
;
Proteins/chemistry/genetics/*physiology
;
Receptors, IgE/metabolism
;
Sequence Homology, Amino Acid
;
*Signal Transduction
;
TNF Receptor-Associated Factor 1
;
TNF Receptor-Associated Factor 2
;
TNF Receptor-Associated Factor 3
;
Up-Regulation
;
Zinc Fingers
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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