Nucleic Acids Research, 1985, Vol. 13, No. 8 2931-2941
© 1985
Articles |
Cloning and sequence analysis of an Ig
light chain mRNA expressed in the Burkitt's lymphoma cell line EB4
Beatson Institute for Cancer Research, Garscube Estate Switchback Road, Bearsden, Glasgow, UK
Received February 18, 1985. Accepted March 22, 1985.
A cDNA library was constructed from the mRNA of the Ig
producing Burkitt's lymphoma cell line, EB4. Overlapping clones encompassing the coding sequence of the Ig
mRNA were isolated and sequenced. The predicted amino acid sequence shows a short hydrophobic leader peptide and a mature polypeptide of 217 residues in which V, J and C regions can be distinguished. The V region belongs to subgroup VI and has greatest homology (80%) with the Amyloid-AR protein. The constant region is the Kern Oz+ isotype. Probing normal human DNA with the subcloned V
coding sequence detects one gene at high stringency and a family of 11 members at low stringency. To date, no restriction enzyme site polymorphisms have been detected. The V
VI gene is rearranged on both chromosomes of EB4 and is deleted on both chromosomes in the Burkitt's lymphoma cell line BL2.
*Present address: Imperial Cancer Research Fund, Lincoln's Inn Fields, London