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PMID: 1961738 Published · ppublish English Comparative Study Journal Article Research Support, Non-U.S. Gov't

Mouse kappa light-chain recombination signal sequences mediate recombination more frequently than do those of lambda light chain.

Ramsden DA, Wu GE

Abstract

Immunoglobulin and T-cell receptor genes are somatically rearranged by site-specific recombination. Recombination signal sequences (RSS) have been identified as the major targeting element of this process. Recent reports demonstrate that differences in RSS affect the frequency of recombination, suggesting a role for RSS in the development of the B-cell repertoire. Examination of mouse light-chain RSS indicates that kappa light-chain RSS consistently show a greater degree of similarity to a consensus sequence than do those of lambda light chain. To determine whether this difference in natural RSS could affect the patterns of light-chain gene rearrangement and expression, we have constructed recombination substrates containing both a typical mouse kappa RSS pair and a typical mouse lambda RSS pair. Experiments using these substrates demonstrate that the kappa RSS pair mediates recombination at a vastly higher frequency than does the lambda RSS pair. This result argues that RSS differences may contribute significantly to the patterns of mouse immunoglobulin light-chain rearrangement, ultimately resulting in a high proportion of kappa light chain relative to lambda.

MeSH Terms
Animals Base Sequence Cell Line DNA Nucleotidyltransferases/metabolism Gene Rearrangement Immunoglobulin Light Chains/genetics Immunoglobulin kappa-Chains/genetics Immunoglobulin lambda-Chains/genetics Mice Molecular Sequence Data Oligodeoxyribonucleotides Plasmids Protein Sorting Signals/genetics Recombination, Genetic Sequence Homology, Nucleic Acid VDJ Recombinases
Chemicals
Immunoglobulin Light Chains Immunoglobulin kappa-Chains Immunoglobulin lambda-Chains Oligodeoxyribonucleotides Protein Sorting Signals DNA Nucleotidyltransferases VDJ Recombinases
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Ramsden D A
Department of Immunology, University of Toronto, Ontario, Canada.
Wu G E
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36 references, click to expand
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1991-12-01
Pages
10721-5
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC53002
Subset
IM
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