Mutational analysis of Brh2 reveals requirements for compensating mediator functions Journal Article


Authors: Kojic, M.; Zhou, Q.; Fan, J.; Holloman, W. K.
Article Title: Mutational analysis of Brh2 reveals requirements for compensating mediator functions
Abstract: Brh2, a member of the BRCA2 family of proteins, governs homologous recombination in the fungus Ustilago maydis through interaction with Rad51. Brh2 serves at an early step in homologous recombination to mediate Rad51 nucleoprotein filament formation and also has the capability to function at a later step in recombination through its inherent DNA annealing activity. Rec2, a Rad51 paralogue, and Rad52 are additional components of the homologous recombination system, but the absence of either is less critical than Brh2 for operational activity. Here we tested a variety of mutant forms of Brh2 for activity in recombinational repair as measured by DNA repair proficiency. We found that a mutant of Brh2 deleted of the non-canonical DNA-binding domain within the N-terminal region is dependent upon the presence of Rad52 for DNA repair activity. We also determined that a motif first identified in human BRCA2 as important in binding DMC1 also contributes to DNA repair proficiency and cooperates with the BRC element in Rad51 binding. © 2010 Blackwell Publishing Ltd.
Keywords: controlled study; unclassified drug; gene mutation; nonhuman; protein domain; protein function; protein motif; protein analysis; homologous recombination; dna repair; protein dna binding; protein protein interaction; mutational analysis; brca2 protein; gene mapping; amino terminal sequence; fungal protein; protein brh2; rad52 protein; ustilago maydis
Journal Title: Molecular Microbiology
Volume: 79
Issue: 1
ISSN: 0950-382X
Publisher: Blackwell Publishing  
Date Published: 2011-01-01
Start Page: 180
End Page: 191
Language: English
DOI: 10.1111/j.1365-2958.2010.07440.x
PROVIDER: scopus
PMCID: PMC3056505
PUBMED: 21166902
DOI/URL:
Notes: --- - "Export Date: 4 March 2011" - "CODEN: MOMIE" - "Source: Scopus"
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  1. Jie Fan
    5 Fan