Organization of the murine Ig-related lambda 5 gene transcribed selectively in pre-B lymphocytes

EMBO J. 1987 Jan;6(1):103-7.


lambda 5 is an immunoglobulin lambda light chain-related gene which is selectively transcribed in murine pre-B lymphocytes to yield a 1.2 kb poly(A)+ mRNA. Comparison of the nucleotide sequence of a 1 kb cDNA clone with the sequence of a genomic clone isolated from 70Z/3 murine pre-B lymphoma cells shows lambda 5 is composed of three exons spanning a 3.75 kb DNA segment. Conserved splice signal sequences at all exon/intron boundaries and the presence of a long open reading frame indicate that a functional mRNA molecule can be made. Exon I contains a cap-site and a potential ATG start codon as well as sequences encoding a signal peptide. This gene could encode a lambda 5 protein of 209 amino acids which has, however, not yet been identified. The 3' portion of exon II and all of exon III shows strong sequence homologies to J lambda L and C lambda L exons. Homology to the lambda L chain genes is lost in the 5' portion of exon II and throughout exon I. In exon I short homologies to leader sequences and to VH framework 1 sequences are seen.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • B-Lymphocytes / immunology*
  • Base Sequence
  • Cell Line
  • Genes*
  • Immunoglobulin Light Chains / genetics
  • Immunoglobulin lambda-Chains / genetics*
  • Lymphoma
  • Mice
  • Transcription, Genetic*


  • Immunoglobulin Light Chains
  • Immunoglobulin lambda-Chains

Associated data

  • GENBANK/X04748
  • GENBANK/X04769
  • GENBANK/X04770