title: In silico screening of 393 mutants facilitates enzyme engineering of amidase activity in CalB.
abstract: Our previously presented method for high throughput computational screening of mutant activity (Hediger et al., 2012) is benchmarked against experimentally measured amidase activity for 22 mutants of Candida antarctica lipase B (CalB). Using an appropriate cutoff criterion for the computed barriers, the qualitative activity of 15 out of 22 mutants is correctly predicted. The method identifies four of the six most active mutants with ≥3-fold wild type activity and seven out of the eight least active mutants with ≤0.5-fold wild type activity. The method is further used to screen all sterically possible (386) double-, triple- and quadruple-mutants constructed from the most active single mutants. Based on the benchmark test at least 20 new promising mutants are identified.
authors.affiliation: Department of Chemistry, University of Copenhagen , Copenhagen , Denmark.
authors.forename: Martin R
authors.initials: MR
authors.lastname: Hediger
authors.forename: Luca
authors.initials: L
authors.lastname: De Vico
authors.forename: Julie B
authors.initials: JB
authors.lastname: Rannes
authors.forename: Christian
authors.initials: C
authors.lastname: Jäckel
authors.forename: Werner
authors.initials: W
authors.lastname: Besenmatter
authors.forename: Allan
authors.initials: A
authors.lastname: Svendsen
authors.forename: Jan H
authors.initials: JH
authors.lastname: Jensen
keywords: Computational Chemistry; Enzyme Engineering