This entry represents a BRCT domain found in TopBP1 (also known as DNA topoisomerase II-beta-binding protein 1) and SLF1 (SMC5-SMC6 complex localization factor protein 1). TopBP1 functions in DNA replication and damage response. It binds double-stran ...
This entry represents a BRCT domain found in TopBP1 (also known as DNA topoisomerase II-beta-binding protein 1) and SLF1 (SMC5-SMC6 complex localization factor protein 1). TopBP1 functions in DNA replication and damage response. It binds double-stranded DNA breaks and nicks as well as single-stranded DNA [1]. SLF1 plays a role in the DNA damage response (DDR) pathway by regulating postreplication repair of UV-damaged DNA and genomic stability maintenance [2]. This entry corresponds to the eight BRCT domain of TopBP1 and the second one in SLF1.
The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- ...
The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- or heterodimers. BRCT domains are often found as tandem-repeat pairs [2]. Structures of the BRCA1 BRCT domains revealed a basis for a widely utilised head-to-tail BRCT-BRCT oligomerisation mode [3]. This conserved tandem BRCT architecture facilitates formation of the canonical BRCT phospho-peptide interaction cleft at a groove between the BRCT domains. Disease associated missense and nonsense mutations in the BRCA1 BRCT domains disrupt peptide binding by directly occluding this peptide binding groove, or by disrupting key conserved BRCT core folding determinants [5].
