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

Y Nakayama1, S M Weissman, A L Bothwell

  • 1Department of Genetics, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, CT 06536, USA. yasuhiro.nakayama@yale.edu

Biochemical and Biophysical Research Communications
|July 17, 2001
PubMed

Insights

Researchers identified BXMAS1, a novel cell surface receptor gene, in B cells. This gene and its relatives may play a role in B cell development and serve as useful B cell markers.

Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Anti-immunoglobulin M (IgM) crosslinking is a key activator of B cell signaling pathways.
  • Understanding gene activation in response to B cell receptor stimulation is crucial for deciphering B cell function.

Purpose of the Study:

  • To identify and characterize novel genes activated by anti-IgM crosslinking in BL2 B cells.
  • To investigate the structure, function, and genomic organization of the identified gene, BXMAS1.
  • To explore the potential role of BXMAS1 and its homologs in B cell biology.

Main Methods:

  • Gene expression profiling following anti-IgM stimulation of BL2 cells.
  • Bioinformatic analysis for protein structure prediction and domain identification.
  • Human genome search for homologous genes.
  • Expression analysis in various cell lines and tissues.

Main Results:

  • Identification of BXMAS1, a gene encoding a novel putative cell surface receptor with 6 Ig-like domains.
  • BXMAS1 exhibits maximal transcriptional induction at 24 hours post-stimulation.
  • Discovery of 5 additional homologous genes, many containing BXMAS1 domains, located near BXMAS1 on the human genome.
  • Expression of these genes is predominantly restricted to B cells.

Conclusions:

  • BXMAS1 and its homologs represent a novel family of B cell-specific genes.
  • These genes may be involved in B cell development and differentiation within lymphoid organs.
  • BXMAS1 and related genes could serve as valuable markers for different stages of B cell development.

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