title: Nucleotide sequence of a chromosomal rearranged lambda 2 immunoglobulin gene of mouse.
abstract: The rearranged lambda 2 gene of the mouse plasmacytoma cell line MOPC315 has been cloned and sequenced. A comparison of its sequence with the sequence of the unrearranged (germ-line) V, J and C gene segments shows that the sequences of the V gene segments differ at six positions. The sequence of the J and C gene segments remained unchanged. These results add support to the hypothesis that somatic mutations occur in immunoglobulin in genes and that these mutations do not involve the C gene segment. The degree of homology of the elements of the lambda 2 gene with those of the lambda 1 gene and C lambda 3 and C lambda 4 gene fragments suggest a pathway of evolution by gene duplication of the immunoglobulin lambda light chain locus. According to this scheme the original structure V0-J0C0 gave rise to a structure V0-J1C1-J11C11 by duplication of the J0C0 region. A second duplication encompassing the whole region resulted in the present structure: V1-J3C3-J1C1/V2-J2C2-J4C4.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D002875:Chromosomes / Q000032:analysis; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism; D004262:DNA Restriction Enzymes; D005796:Genes; D007147:Immunoglobulin Light Chains / Q000235:genetics*; D007146:Immunoglobulin lambda-Chains / Q000235:genetics*; D051379:Mice; D009693:Nucleic Acid Hybridization; D010954:Plasmacytoma; D010957:Plasmids
chemical_list: D007147:Immunoglobulin Light Chains; D007146:Immunoglobulin lambda-Chains; D004247:DNA; D004262:DNA Restriction Enzymes