Arg150 in E.c.-ALDC exhibited a unique tilted conformation implying the lower activities of E.c.-ALDC comparing to other bacterial ALDCs. Sequence conservation of E.c.-ALDC is represented by ribbons and lines (conserved, magenta to variable, cyan).
Fermentive production of isobutanol using highly active ketol-acid reductoisomerase enzymes
申请人:Butamax (TM) Advanced Biofuels LLC
公开号:EP2543721A1
公开(公告)日:2013-01-09
Methods for the fermentative production of isobutanol is provided by the fermentative growth of a recombinant microorganism expressing a highly active ketol-acid reductoisomerase enzyme in addition to other enzymes required for conversion of glucose to isobutanol.
Methods for the evolution of NADPH binding ketol-acid reductoisomerase enzymes to acquire NADH binding functionality are provided. Specific mutant ketol-acid reductoisomerase enzymes isolated from Pseudomonas that have undergone co-factor switching to bind NADH are described.