Crystal structure of O-acetyl-L-serine sulfhydrylase A (CysK) from Staphylococcus aureus NCTC 8325 complexed with a CymR pentapeptide

(2S)-2-amino-6-[[3-hydroxy-2-methyl-5-(phosphonooxymethyl)pyridin-4-yl]methylideneamino]hexanoic acid

Identification of Cysteine Metabolism Regulator (CymR)-Derived Pentapeptides as Nanomolar Inhibitors of Staphylococcus aureus O -Acetyl-l-serine Sulfhydrylase (CysK).

AQKPVDNITQIIGGTPVVKLRNVVDDNAADVYVKLEYQNPGGSV(LLP)DRIALAMIEKAEREGKIKPGDTIVEPTSGNT
GIGLAFVCAAKGYKAVFTMPETMSQERRNLLKAYGAELVLTPGSEAMKGAIKKAKELKEEHGYFEPQQFENPANPEVHEL
TTGPELLQQFEGKTIDAFLAGVGTGGTLSGVGKVLKKEYPNIEIVAIEPEASPVLSGGEPGPHKLQGLGAGFIPGTLNTE
IYDSIIKVGNDTAMEMSRRVAKEEGILAGISSGAAIYAAIQKAKELGKGKTVVTVLPSNGERYLSTPLYS

AQKPVDNITQIIGGTPVVKLRNVVDDNAADVYVKLEYQNPGGSVKDRIALAMIEKAEREGKIKPGDTIVEPTSGNTGIGL
AFVCAAKGYKAVFTMPETMSQERRNLLKAYGAELVLTPGSEAMKGAIKKAKELKEEHGYFEPQQFENPANPEVHELTTGP
ELLQQFEGKTIDAFLAGVGTGGTLSGVGKVLKKEYPNIEIVAIEPEASPVLSGGEPGPHKLQGLGAGFIPGTLNTEIYDS
IIKVGNDTAMEMSRRVAKEEGILAGISSGAAIYAAIQKAKELGKGKTVVTVLPSNGERYLSTPLYS

Staphylococcus aureus subsp. aureus NCTC 8325

0.2 M ammonium acetate, 0.1M HEPES pH 7.5, 23-25% PEG3350

Contains the holo form of the same protein

Contains the same protein in complex with a different peptide

Cysk, cysteine synthesis, CymR, protein binding