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4ZU6

Crystal Structure of O-Acetylserine Sulfhydrylase from Haemophilus influenzae in complex with pre-reactive o-acetyl serine, alpha-aminoacrylate reaction intermediate and Peptide inhibitor at the resolution of 2.25A

Replaces:  4MH9
Functional Information from GO Data
ChainGOidnamespacecontents
X0003824molecular_functioncatalytic activity
X0004124molecular_functioncysteine synthase activity
X0005737cellular_componentcytoplasm
X0006535biological_processcysteine biosynthetic process from serine
X0008652biological_processamino acid biosynthetic process
X0016740molecular_functiontransferase activity
X0016765molecular_functiontransferase activity, transferring alkyl or aryl (other than methyl) groups
X0019344biological_processcysteine biosynthetic process
X0080146molecular_functionL-cysteine desulfhydrase activity
Functional Information from PDB Data
site_idAC1
Number of Residues10
Detailsbinding site for residue OAS X 401
ChainResidue
XTHR69
XHOH537
XSER70
XASN72
XTHR73
XGLN143
XPHE144
XGLY177
XGLY228
XPLP402

site_idAC2
Number of Residues21
Detailsbinding site for residue PLP X 402
ChainResidue
XLYS42
XASN72
XGLY175
XVAL176
XGLY177
XTHR178
XGLY179
XGLY180
XSER181
XGLN227
XGLY228
XILE229
XSER272
XPRO299
XSER300
XTYR305
XOAS401
XHOH513
XHOH531
XHOH535
XHOH556

Functional Information from PROSITE/UniProt
site_idPS00901
Number of Residues19
DetailsCYS_SYNTHASE Cysteine synthase/cystathionine beta-synthase P-phosphate attachment site. KiEgrn.PSySVKcRiGanM
ChainResidueDetails
XLYS31-MET49

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsBinding site: {"evidences":[{"source":"UniProtKB","id":"P0A1E3","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsBinding site: {"description":"in other chain","evidences":[{"source":"UniProtKB","id":"P0A1E3","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues6
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues1
DetailsModified residue: {"description":"N6-(pyridoxal phosphate)lysine","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

243531

PDB entries from 2025-10-22

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