Structural highlights
Function
[PIGH_SERS3] Involved in the biosynthesis of 4-methoxy-2,2'-bipyrrole-5-carbaldehyde (MBC), one of the terminal products involved in the biosynthesis of the red antibiotic prodigiosin (Pig). Carrier of the L-malonyl group (malonyl-S-PigH), which is decarboxylated by PigJ to yield a C2 carbanion acetyl-S-PigH. Then the pyrrolyl group of pyrrolyl-S-cysteinyl PigJ intermediate is captured by the C2 carbanion acetyl-S-PigH to yield the pyrrolyl-beta-ketoacyl-S-PigH. In the last step, PigH catalyzes the decarboxylative condensation between the pyrrolyl-beta-ketoacyl (pyrrolyl-beta-ketoacyl-S-PigH) and L-serine to yield 4-hydroxy-2,2'-bipyrrole-5-methanol (HBM).[1] [2]
References
- ↑ Williamson NR, Simonsen HT, Ahmed RA, Goldet G, Slater H, Woodley L, Leeper FJ, Salmond GP. Biosynthesis of the red antibiotic, prodigiosin, in Serratia: identification of a novel 2-methyl-3-n-amyl-pyrrole (MAP) assembly pathway, definition of the terminal condensing enzyme, and implications for undecylprodigiosin biosynthesis in Streptomyces. Mol Microbiol. 2005 May;56(4):971-89. PMID:15853884 doi:http://dx.doi.org/10.1111/j.1365-2958.2005.04602.x
- ↑ Garneau-Tsodikova S, Dorrestein PC, Kelleher NL, Walsh CT. Protein assembly line components in prodigiosin biosynthesis: characterization of PigA,G,H,I,J. J Am Chem Soc. 2006 Oct 4;128(39):12600-1. PMID:17002325 doi:http://dx.doi.org/10.1021/ja063611l
