Extrachromosomal DNA substrates in pre-B cells undergo inversion or deletion at immunoglobulin V-(D)-J joining signals

Author: Hesse, J.E.; Lieber, M.R.; Gellert, M.; Mizuuchi, K.

Description: Sequences encoding immunoglobulin variable domains are known to be assembled from variable (V), diversity (D), and joining (J) segments by site-specific recombination. We present a sensitive and rapid assay for V-(D)-J recombination that uses plasmid DNA transiently introduced into transformed pre-B cells, and demonstrates that the recombination is independent of any unique chromosomal context. Sequences sufficient to constitute recombination sites are contained within the 84 and 42 bp flanking, respectively, the murine Jκ 1 and VκL8 segments, which include the known heptamer-nonamer V-(D)-J joining signals. Deletion and inversion occur at comparable frequencies. Thus, V-(D)-J recombination may be relatively insensitive to the topological arrangement of sites, and events at the two novel junctions produced by the reaction may be coupled.

Subject headings:

Publication year: 1987

Journal or book title: Cell

Volume: 49

Issue: 6

Pages: 775-783

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Type: Journal Article

Serial number: 1815