GSBS Student Publications


Correlation of biochemical properties with the oligomeric state of human rad52 protein

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Biochemistry and Molecular Pharmacology



Document Type


Medical Subject Headings

Base Sequence; Biopolymers; DNA Primers; DNA, Single-Stranded; DNA-Binding Proteins; Humans; Microscopy, Electron


Life Sciences | Medicine and Health Sciences


The human Rad52 protein self-associates to form ring-shaped oligomers, as well as higher order complexes of these rings. We have shown previously that there are two experimentally separable self-association domains in HsRad52, one in the N terminus (residues 1-192) responsible for assembly of individual subunits into rings, and one in the C terminus (residues 218-418) responsible for higher order oligomerization of rings. Earlier studies suggest that the higher order complexes promote DNA end-joining, and others suggest that these complexes are relevant to in vivo Rad52 function. In this study we demonstrate that although inherent binding to single-stranded DNA depends on neither higher order complexes of Rad52 rings nor the ring-shaped oligomers themselves, higher order complexes are important for activities involving simultaneous interaction with more than one DNA molecule. This provides biochemical support for what may be an important in vivo function of Rad52.

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Citation: J Biol Chem. 2002 Nov 29;277(48):46172-8. Epub 2002 Sep 10. Link to article on publisher's site

DOI of Published Version


Related Resources

Link to article in PubMed

Journal Title

The Journal of biological chemistry

PubMed ID