1crx
From Proteopedia
CRE RECOMBINASE/DNA COMPLEX REACTION INTERMEDIATE I
Structural highlights
FunctionRECR_BPP1 Catalyzes site-specific recombination between two 34-base-pair LOXP sites. Its role is to maintain the phage genome as a monomeric unit-copy plasmid in the lysogenic state. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedDuring site-specific DNA recombination, which brings about genetic rearrangement in processes such as viral integration and excision and chromosomal segregation, recombinase enzymes recognize specific DNA sequences and catalyse the reciprocal exchange of DNA strands between these sites. The bacteriophage recombinase Cre catalyses site-specific recombination between two 34-base-pair loxP sites. The crystal structure at 2.4 A resolution of Cre bound to a loxP substrate reveals an intermediate in the recombination reaction, in which a Cre molecule has cleaved the substrate to form a covalent 3'-phosphotyrosine linkage with the DNA. Four recombinases and two loxP sites form a synapsed structure in which the DNA resembles models of four-way Holliday-Junction intermediates. The Cre-loxP complex challenges models of site-specific recombination that require large changes in quaternary structure. Subtle allosteric changes at the carboxy termini of the Cre subunits may instead coordinate the cleavage and strand-exchange reactions. Structure of Cre recombinase complexed with DNA in a site-specific recombination synapse.,Guo F, Gopaul DN, van Duyne GD Nature. 1997 Sep 4;389(6646):40-6. PMID:9288963[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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