The CMRF-35H gene structure predicts for an independently expressed member of an ITIM/ITAM pair of molecules localized to human chromosome 17.
The CMRF-35 monoclonal antibody recognizes an epitope found on at least two cell surface molecules, differentially expressed by many leukocytes. These molecules, the CMRF-35H (9) and CMRF-35A (CMRF-35) antigens are both members of the immunoglobulin (Ig) superfamily with a single V-like Ig domain. The function of these molecules is unknown, however the presence of putative immunoreceptor tyrosine-based inhibitory motifs (ITIM) in the cytoplasmic domain of the CMRF-35H molecule suggests that this molecule may play a regulatory role in leukocyte function. The CMRF-35H and CMRF-35A molecules show several similarities to the family of molecules containing ITIM or immunoreceptor tyrosine-based activatory motifs (ITAM) suggesting that CMRF-35H/CMRF-35A may be new members of this family. This would further indicate that, like other ITIM/ITAM containing molecules, CMRF-35H/CMRF-35A will also play an important role in the immune response. To further characterize these molecules, we have isolated genomic clones for the CMRF-35H gene and determined its intron-exon organization. The gene spans approximately 12 kb and consists of seven exons. Furthermore, this gene has been mapped to chromosome 17 and thus is not linked to the known human ITIM containing genes which map to human chromosome 19 or the recently characterized molecule, NKp44, localized to human chromosome 6.[1]References
- The CMRF-35H gene structure predicts for an independently expressed member of an ITIM/ITAM pair of molecules localized to human chromosome 17. Clark, G.J., Green, B.J., Hart, D.N. Tissue Antigens (2000) [Pubmed]
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