Jump to main content
Jump to site search


C–C bond forming radical SAM enzymes involved in the construction of carbon skeletons of cofactors and natural products

Author affiliations

Abstract

Covering: up to the end of 2017

C–C bond formations are frequently the key steps in cofactor and natural product biosynthesis. Historically, C–C bond formations were thought to proceed by two electron mechanisms, represented by Claisen condensation in fatty acids and polyketide biosynthesis. These types of mechanisms require activated substrates to create a nucleophile and an electrophile. More recently, increasing number of C–C bond formations catalyzed by radical SAM enzymes are being identified. These free radical mediated reactions can proceed between almost any sp3 and sp2 carbon centers, allowing introduction of C–C bonds at unconventional positions in metabolites. Therefore, free radical mediated C–C bond formations are frequently found in the construction of structurally unique and complex metabolites. This review discusses our current understanding of the functions and mechanisms of C–C bond forming radical SAM enzymes and highlights their important roles in the biosynthesis of structurally complex, naturally occurring organic molecules. Mechanistic consideration of C–C bond formation by radical SAM enzymes identifies the significance of three key mechanistic factors: radical initiation, acceptor substrate activation and radical quenching. Understanding the functions and mechanisms of these characteristic enzymes will be important not only in promoting our understanding of radical SAM enzymes, but also for understanding natural product and cofactor biosynthesis.

Graphical abstract: C–C bond forming radical SAM enzymes involved in the construction of carbon skeletons of cofactors and natural products

Back to tab navigation

Publication details

The article was received on 21 Jan 2018 and first published on 10 Apr 2018


Article type: Review Article
DOI: 10.1039/C8NP00006A
Citation: Nat. Prod. Rep., 2018, Advance Article
  •   Request permissions

    C–C bond forming radical SAM enzymes involved in the construction of carbon skeletons of cofactors and natural products

    K. Yokoyama and E. A. Lilla, Nat. Prod. Rep., 2018, Advance Article , DOI: 10.1039/C8NP00006A

Search articles by author

Spotlight

Advertisements