2006
Recombination Mediator and Rad51 Targeting Activities of a Human BRCA2 Polypeptide
FILLIPO, Joseph, Peter CHI, Lumír KREJČÍ a Patrick SUNGZákladní údaje
Originální název
Recombination Mediator and Rad51 Targeting Activities of a Human BRCA2 Polypeptide
Název česky
Aktivity BRCA2 polypetidu jako rekombinačního mediátora
Autoři
FILLIPO, Joseph (840 Spojené státy), Peter CHI (840 Spojené státy), Lumír KREJČÍ (203 Česká republika, garant) a Patrick SUNG (840 Spojené státy)
Vydání
J. Biol. Chem. 2006, 0021-9258
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10600 1.6 Biological sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 5.808
Kód RIV
RIV/00216224:14310/06:00017411
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000236988100028
Klíčová slova anglicky
BRCA2-Rad51 interactions
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 11. 6. 2009 11:05, doc. Mgr. Lumír Krejčí, Ph.D.
V originále
BRCA2 likely exerts its tumor suppressor function by enhancing the efficiency of the homology-directed repair of injured chromosomes. To help define the DNA repair role of BRCA2, we expressed and purified a polypeptide, BRC3/4-DBD, that harbors its BRC3 and BRC4 repeats and DNA binding domain. BRC3/4-DBD interacted with hRad51 and bound DNA with a distinct preference for single-stranded (ss) DNA. Importantly we demonstrated by biochemical means and electron microscopy that BRC3/4-DBD nucleates hRad51 onto ssDNA and acts as a recombination mediator in enabling hRad51 to utilize replication protein A-coated ssDNA as recombination substrate. These functions of BRC3/4-DBD required both the BRC repeats and the BRCA2 DNA binding domain. The results thus clarify the role of BRCA2 in Rad51-dependent DNA recombination and repair, and the experimental strategies described herein should be valuable for systematically deciphering this BRCA2 function.
Česky
BRCA2 likely exerts its tumor suppressor function by enhancing the efficiency of the homology-directed repair of injured chromosomes. To help define the DNA repair role of BRCA2, we expressed and purified a polypeptide, BRC3/4-DBD, that harbors its BRC3 and BRC4 repeats and DNA binding domain. BRC3/4-DBD interacted with hRad51 and bound DNA with a distinct preference for single-stranded (ss) DNA. Importantly we demonstrated by biochemical means and electron microscopy that BRC3/4-DBD nucleates hRad51 onto ssDNA and acts as a recombination mediator in enabling hRad51 to utilize replication protein A-coated ssDNA as recombination substrate. These functions of BRC3/4-DBD required both the BRC repeats and the BRCA2 DNA binding domain. The results thus clarify the role of BRCA2 in Rad51-dependent DNA recombination and repair, and the experimental strategies described herein should be valuable for systematically deciphering this BRCA2 function.
Návaznosti
LC06030, projekt VaV |
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ME 888, projekt VaV |
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MSM0021622413, záměr |
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