Dna2 is a structure-specific nuclease, with affinity for 5'-flap intermediates.
Dna2 is a structure-specific nuclease, with affinity for 5'-flap intermediates.
复制标题
DOI:
10.1093/nar/gkp1055
复制
发表时间:
2010-01
影响因子:
14.9
通讯作者:
Bambara RA
中科院分区:
文献类型:
--
作者:
Stewart JA;Campbell JL;Bambara RA
Dna2 is a nuclease/helicase with proposed roles in DNA replication, double-strand break repair and telomere maintenance. For each role Dna2 is proposed to process DNA substrates with a 5′-flap. To date, however, Dna2 has not revealed a preference for binding or cleavage of flaps over single-stranded DNA. Using DNA binding competition assays we found that Dna2 has substrate structure specificity. The nuclease displayed a strong preference for binding substrates with a 5′-flap or some variations of flap structure. Further analysis revealed that Dna2 recognized and bound both the single-stranded flap and portions of the duplex region immediately downstream of the flap. A model is proposed in which Dna2 first binds to a flap base, and then the flap threads through the protein with periodic cleavage, to a terminal flap length of ∼5 nt. This resembles the mechanism of flap endonuclease 1, consistent with cooperation of these two proteins in flap processing.
登录
查看更多内容
影响因子:
3.7
作者:
Budd ME;Campbell JL
通讯作者:
Campbell JL
影响因子:
14.9
作者:
Liao, Shuren;Toczylowski, Thomas;Yan, Hong
通讯作者:
Yan, Hong
影响因子:
14.9
作者:
Hohl M;Dunand-Sauthier I;Staresincic L;Jaquier-Gubler P;Thorel F;Modesti M;Clarkson SG;Schärer OD
通讯作者:
Schärer OD
影响因子:
4.5
作者:
Budd ME;Tong AH;Polaczek P;Peng X;Boone C;Campbell JL
通讯作者:
Campbell JL
影响因子:
5.3
作者:
Budd, ME;Campbell, JL
通讯作者:
Campbell, JL