L434F |
mutation alters the regio- and stereospecificity of the final products, with a product ratio of 66 : 34 for 8R- and 12S-hydroperoxide, respectively. In the closed conformation, the phenyl group of Phe434 shields the C8 site of the substrate, preventing access of the oxygen molecule to this site, which leads to a quenching of the 8R-product. Both closed and open conformations of Phe434 allow the oxygen molecule to approach the pro-S face of the C12 site of the substrate, which enhances the propensity of the 12S-hydroperoxide |
Plexaura homomalla |