BXMAS1 identifies a cluster of homologous genes differentially expressed in B cells

Yasuhiro Nakayama, Sherman M. Weissman, Alfred L.M. Bothwell

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Characterization of genes activated by anti-IgM crosslinking of BL2 cells identified one gene, designated BXMAS1, that is predicted to be a novel cell surface receptor. The time course of activation indicates maximal transcriptional induction after 24 h. The predicted protein contains 977 aa residues, with a cytoplasmic domain containing 2 ITIM motifs. The ectodomain of the protein contains 6 repeats of characteristic 93 aa sequences which we have designated BXMAS1 domains. These domains correspond to 6 out of 8 Ig-like domains in BXMAS1. A search of the human genome revealed 5 additional closely linked homologous genes many of which contain BXMAS1 domains as well. Analysis of expression in cell lines and tissues suggests a general restriction of expression of these genes to B cells. These genes may be involved in B cell development and differentiation in peripheral lymphoid organs and may be useful markers of B cell stages.

Original languageEnglish (US)
Pages (from-to)830-837
Number of pages8
JournalBiochemical and Biophysical Research Communications
Issue number3
StatePublished - 2001
Externally publishedYes


  • Blymphocytes
  • Burkitt's lymphoma cell
  • Gene cluster
  • Gene regulation

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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