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Abstract
V(D)J recombination consists of a DNA cleavage reaction catalysed by RAG1 and RAG2, followed by an end-joining reaction that utilizes the cell's double-strand break repair machinery. Genes essential for the end-joining reaction include: XRCC4 encoding a protein of unknown enzymatic function; XRCC5 and XRCC6 encoding 86 and 70 kDa subunits of the Ku autoantigen, a DNA end-binding protein that is also the regulatory subunit of DNA-dependent protein kinase (DNA-PK); and XRCC7 encoding the catalytic subunit (DNA-PKcs) of DNA-PK. Recent progress in understanding the cleavage reaction, coupled with what was previously known about Ku, DNA-PK, and double-strand break repair, provide the foundation for a working model of how V(D)J recombination might be catalysed.
View details for PubMedID 9200330