A Catalytic Role for C-H/π Interactions in Base Excision Repair by Bacillus cereus DNA Glycosylase AlkD.
A Catalytic Role for C-H/π Interactions in Base Excision Repair by Bacillus cereus DNA Glycosylase AlkD.
复制标题
DOI:
10.1021/jacs.6b07399
复制
发表时间:
2016-09-14
影响因子:
15
通讯作者:
Eichman BF
中科院分区:
文献类型:
--
作者:
Parsons ZD;Bland JM;Mullins EA;Eichman BF
DNA glycosylases protect genomic integrity by locating and excising aberrant nucleobases. Substrate recognition and excision usually takes place in an extrahelical conformation, which is often stabilized by π-stacking interactions between the lesion nucleobase and aromatic side chains in the glycosylase active site. Bacillus cereus AlkD is the only DNA glycosylase known to catalyze base excision without extruding the damaged nucleotide from the DNA helix. Instead of contacting the nucleobase itself, the AlkD active site interacts with the lesion deoxyribose through a series of C-H/π interactions. These interactions are ubiquitous in protein structures, but evidence for their catalytic significance in enzymology is lacking. Here, we show that the CH/π interactions between AlkD and the lesion deoxyribose participate in catalysis of glycosidic bond cleavage. This is the first demonstration of a catalytic role for C-H/π interactions as intermolecular forces important to DNA repair.
登录
查看更多内容
影响因子:
14.9
作者:
Wilson KA;Kellie JL;Wetmore SD
通讯作者:
Wetmore SD
影响因子:
16
作者:
Klapacz J;Lingaraju GM;Guo HH;Shah D;Moar-Shoshani A;Loeb LA;Samson LD
通讯作者:
Samson LD
影响因子:
64.8
作者:
Dinner, AR;Blackburn, GM;Karplus, M
通讯作者:
Karplus, M
DOI:
10.1016/j.bbapap.2012.10.005
发表时间:
2013-01
影响因子:
3.2
作者:
Brooks, Sonja C.;Adhikary, Suraj;Rubinson, Emily H.;Eichman, Brandt F.
通讯作者:
Eichman, Brandt F.
影响因子:
14.9
作者:
Hendershot, Jenna M.;O'Brien, Patrick J.
通讯作者:
O'Brien, Patrick J.