Objective
Enzymes are the catalysts which allow important chemical reactions to occur on biologically relevant time-scales, and the current understanding of enzymes assumes that each enzyme is specifically tailored for a single reaction. Enzyme promiscuity refers to an enzyme’s ability to catalyze chemical transformations other than its native reactions. The identification of an increasing number of promiscuous enzymes challenges the classical “one enzyme, one activity” dogma.The notion that a single enzyme is capable of efficiently catalyzing a number of different reactions, which proceed through different transition states, is challenging to our current comprehension of enzymes. Although enzyme promiscuity is now a well documented phenomenon, the mechanistic principles underlying this behaviour are not well understood. This proposal aims to study catalytic promiscuity in the alkaline phosphatase superfamily, a class of phosphate and sulphate ester cleaving enzymes which are known to be prone to promiscuous behaviour. Specifically, linear free energy relationships will be used to characterize the bond-making and bond-breaking processes in phosphate/sulfate ester cleavage, and how the enzyme is able to stabilize these events. We will also use site directed mutagenesis and a high throughput selection system based on microdroplets to probe the contributions of individual amino acid residues to the catalytic mechanism and study enzyme evolution. Of particular interest is the question of how one enzyme active site is able to efficiently catalyze several thermodynamically demanding reactions which pass through transition states with vastly different properties under non-enzymatic conditions. In addition to enhancing our basic understanding of enzyme function and evolution, the mechanistic insight gleaned from this study will be instrumental in the directed evolution of enzymes with enhanced activity for specific uses in the biotech industry.
Fields of science (EuroSciVoc)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP7-PEOPLE-2011-IIF
See other projects for this call
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
CB2 1TN CAMBRIDGE
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.