Title
Human RAD52 exhibits two modes of self-association
GSBS Program
Biochemistry & Molecular Pharmacology
UMMS Affiliation
Department of Biochemistry and Molecular Pharmacology
Date
3-30-2001
Document Type
Article
Medical Subject Headings
DNA Repair; DNA-Binding Proteins; Humans; Kinetics; Microscopy, Electron; Mutagenesis; Peptide Fragments; Recombinant Proteins; Sequence Deletion; Thioredoxins
Disciplines
Life Sciences | Medicine and Health Sciences
Abstract
The human RAD52 protein plays an important role in the earliest stages of chromosomal double-strand break repair via the homologous recombination pathway. Individual subunits of RAD52 self-associate into rings that can then form higher order complexes. RAD52 binds to double-strand DNA ends, and recent studies suggest that the higher order self-association of the rings promotes DNA end-joining. Earlier studies defined the self-association domain of RAD52 to a unique region in the N-terminal half of the protein. Here we show that there are in fact two experimentally separable self-association domains in RAD52. The N-terminal self-association domain mediates the assembly of monomers into rings, and the previously unidentified domain in the C-terminal half of the protein mediates higher order self-association of the rings.
Rights and Permissions
Citation: J Biol Chem. 2001 May 11;276(19):15876-80. Epub 2001 Feb 13. Link to article on publisher's site