Download MendeleyThe key role of E418 carboxyl group in the formation of Nt.BspD6I nickase active site: Structural and functional properties of Nt.BspD6I E418A mutant.
Artyukh, R.I., Kachalova, G.S., Yunusova, A.K., Fatkhullin, B.F., Atanasov, B.P., Perevyazova, T.A., Popov, A.N., Gabdulkhakov, A.G., Zheleznaya, L.A.(2020) J Struct Biol 210: 107508-107508
- PubMed: 32298813
- DOI: https://doi.org/10.1016/j.jsb.2020.107508
- Primary Citation of Related Structures:
6QNZ - PubMed Abstract:
The mutated nickase Nt.BspD6I E418A has been obtained by site-directed mutagenesis. The purified protein has been crystallized, and its spatial structure has been determined at 2.45 Å resolution. An analysis of the crystal structures of the wild-type and mutated nickase have shown that the elimination of a carboxyl group due to the E418A mutation initiates marked conformational changes in both the N-terminal recognition domain and the C-terminal catalytic domain of nickase and insignificantly affects its linker domain. This is supported by changes in the functional properties of mutated nickase: an increase in the oligomerization capacity in the presence of a substrate, a reduction in the capacity to bind a substrate, and complete loss of catalytic activity.
Organizational Affiliation:
Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia. Electronic address: rimmaartyukh@gmail.com.
