Protein
Isochorismate pyruvate lyase
Organism
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
Function
Involved in the incorporation of salicylate into the siderophore pyochelin. Catalyzes the elimination of the enolpyruvyl side chain from isochorismate to yield salicylate and pyruvate via a rare pericyclic hydrogen transfer mechanism from C2 to C5. PchB also catalyzes the nonphysiological Claisen rearrangement of chorismate to prephenate in which the pyruvylenol tail is transferred from a C3 ether linkage to a C1-C9 linkage.
Sequence
MKTPEDCTGLADIREAIDRIDLDIVQALGRRMDYVKAASRFKASEAAIPAPERVAAMLPERARWAEENGLDAPFVEGLFAQIIHWYIAEQIKYWRQTRGAA