[DPOLL_HUMAN] Repair polymerase. Involved in base excision repair (BER) responsible for repair of lesions that give rise to abasic (AP) sites in DNA. Has both DNA polymerase and terminal transferase activities. Has a 5'-deoxyribose-5-phosphate lyase (dRP lyase) activity.
Pol lambda is a family X member believed to fill short gaps during DNA repair. Here we report crystal structures of Pol lambda representing three steps in filling a single-nucleotide gap. These structures indicate that, unlike other DNA polymerases, Pol lambda does not undergo large subdomain movements during catalysis, and they provide a clear characterization of the geometry and stereochemistry of the in-line nucleotidyl transfer reaction.
A closed conformation for the Pol lambda catalytic cycle.,Garcia-Diaz M, Bebenek K, Krahn JM, Kunkel TA, Pedersen LC Nat Struct Mol Biol. 2005 Jan;12(1):97-8. Epub 2004 Dec 19. PMID:15608652
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ Garcia-Diaz M, Bebenek K, Kunkel TA, Blanco L. Identification of an intrinsic 5'-deoxyribose-5-phosphate lyase activity in human DNA polymerase lambda: a possible role in base excision repair. J Biol Chem. 2001 Sep 14;276(37):34659-63. Epub 2001 Jul 16. PMID:11457865 doi:10.1074/jbc.M106336200
↑ Maga G, Ramadan K, Locatelli GA, Shevelev I, Spadari S, Hubscher U. DNA elongation by the human DNA polymerase lambda polymerase and terminal transferase activities are differentially coordinated by proliferating cell nuclear antigen and replication protein A. J Biol Chem. 2005 Jan 21;280(3):1971-81. Epub 2004 Nov 10. PMID:15537631 doi:10.1074/jbc.M411650200
↑ Garcia-Diaz M, Bebenek K, Krahn JM, Kunkel TA, Pedersen LC. A closed conformation for the Pol lambda catalytic cycle. Nat Struct Mol Biol. 2005 Jan;12(1):97-8. Epub 2004 Dec 19. PMID:15608652 doi:http://dx.doi.org/10.1038/nsmb876