Crystal structure of subtilisin DY, a random mutant of subtilisin Carlsberg.Eschenburg, S., Genov, N., Peters, K., Fittkau, S., Stoeva, S., Wilson, K.S., Betzel, C.
(1998) Eur.J.Biochem. 257: 309-318
- PubMed: 9826175
- PubMed Abstract:
- Crystallization and Preliminary X-Ray Analysis of Subtilisin Dy, a Natural Mutant of Subtilisin Carlsberg
Betzel, C.,Visanji, M.,Eschenburg, S.,Wilson, K.S.,Peters, K.,Fittkau, S.,Singh, T.P.,Genov, N.
(1993) Arch.Biochem.Biophys. 302: 499
The crystal structure of subtilisin DY inhibited by N-benzyloxycarbonyl-Ala-Pro-Phe-chloromethyl ketone has been solved by molecular replacement with subtilisin Carlsberg as the starting model. The model has been refined to a crystallographic R facto ...
The crystal structure of subtilisin DY inhibited by N-benzyloxycarbonyl-Ala-Pro-Phe-chloromethyl ketone has been solved by molecular replacement with subtilisin Carlsberg as the starting model. The model has been refined to a crystallographic R factor (= sigma absolute value [(absolute value Fo) - (absolute value Fc)] / sigma (absolute value of Fo) of 15.1% using X-ray diffraction data to 0.175 nm resolution. Subtilisin DY is an alkaline proteinase from the X-irradiated Japanese strain DY of Bacillus licheniformis, which normally produces subtilisin Carlsberg. It has very similar properties to subtilisin Carlsberg, with a slightly enhanced resistance to heat and guanidine hydrochloride-induced denaturation, in spite of the fact that the sequences of the two enzymes differ in 31 positions out of 274 residues. The close similarity in overall three-dimensional structure of subtilisins DY and Carlsberg and also their physicochemical properties, such as activity and stability, shows that nature aided by X-irradiation for rapid 'evolution' is able to accommodate considerable changes in sequence without substantial changes in property.
European Molecular Biology Laboratory, Institute of Physiological Chemistry, Hamburg, Germany. Susanna@unisgi1.desy.de