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(-) Description

Title :  O-ACETYLSERINE SULFHYDRYLASE COMPLEX
 
Authors :  B. Huang, M. W. Vetting, S. L. Roderick
Date :  09 Dec 04  (Deposition) - 26 Apr 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.55
Chains :  Asym. Unit :  A,P
Biol. Unit 1:  A,P  (2x)
Keywords :  X-Ray Crystallography; Sulfhydrylase, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  B. Huang, M. W. Vetting, S. L. Roderick
The Active Site Of O-Acetylserine Sulfhydrylase Is The Anchor Point For Bienzyme Complex Formation With Serine Acetyltransferase.
J. Bacteriol. V. 187 3201 2005
PubMed-ID: 15838047  |  Reference-DOI: 10.1128/JB.187.9.3201-3205.2005
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - O-ACETYLSERINE SULFHYDRYLASE
    ChainsA
    EC Number2.5.1.47
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET28A
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    GeneCYSK
    Organism ScientificHAEMOPHILUS INFLUENZAE
    Organism Taxid727
    SynonymCYSTEINE SYNTHASE;
O-ACETYLSERINE (THIOL)-LYASE
 
Molecule 2 - DECAMER FRAGMENT OF SERINE ACETYLTRANSFERASE
    ChainsP
    EngineeredYES
    FragmentRESIDUES 258-267
    Other DetailsSEQUENCE OCCURS NATUARALLY IN HAEMOPHILUS INFLUENZAE, GENE CYSE
    SynonymSAT FRAGMENT;
E.C.2.3.1.30
    SyntheticYES

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AP
Biological Unit 1 (2x)AP

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 2)

Asymmetric Unit (2, 2)
No.NameCountTypeFull Name
1LLP1Mod. Amino Acid2-LYSINE(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHANE)
2SO41Ligand/IonSULFATE ION
Biological Unit 1 (2, 4)
No.NameCountTypeFull Name
1LLP2Mod. Amino Acid2-LYSINE(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHANE)
2SO42Ligand/IonSULFATE ION

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHIS A:24 , ASN A:25 , ARG A:154 , HOH A:6134 , HOH A:6234BINDING SITE FOR RESIDUE SO4 A 6000

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1Y7L)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1Y7L)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1Y7L)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CYS_SYNTHASEPS00901 Cysteine synthase/cystathionine beta-synthase P-phosphate attachment site.CYSK_HAEIN31-49  1A:31-49
Biological Unit 1 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CYS_SYNTHASEPS00901 Cysteine synthase/cystathionine beta-synthase P-phosphate attachment site.CYSK_HAEIN31-49  2A:31-49

(-) Exons   (0, 0)

(no "Exon" information available for 1Y7L)

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:310
 aligned with CYSK_HAEIN | P45040 from UniProtKB/Swiss-Prot  Length:316

    Alignment length:310
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311
           CYSK_HAEIN     2 AIYADNSYSIGNTPLVRLKHFGHNGNVVVKIEGRNPSYSVKCRIGANMVWQAEKDGTLTKGKEIVDATSGNTGIALAYVAAARGYKITLTMPETMSLERKRLLCGLGVNLVLTEGAKGMKGAIAKAEEIVASDPSRYVMLKQFENPANPQIHRETTGPEIWKDTDGKVDVVVAGVGTGGSITGISRAIKLDFGKQITSVAVEPVESPVISQTLAGEEVKPGPHKIQGIGAGFIPKNLDLSIIDRVETVDSDTALATARRLMAEEGILAGISSGAAVAAADRLAKLPEFADKLIVVILPSASERYLSTALF 311
               SCOP domains d1y7la1 A:2-311 O-acetylserine sulfhydrylase (Cysteine synthase)                                                                                                                                                                                                                                                       SCOP domains
               CATH domains 1y7lA01 A:2-41,A:146-311                -1y7lA02 A:43-145  [code=3.40.50.1100, no name defined]                                                 1y7lA01 A:2-41,A:146-311  [code=3.40.50.1100, no name defined]                                                                                                         CATH domains
               Pfam domains -----PALP-1y7lA01 A:7-300                                                                                                                                                                                                                                                                                  ----------- Pfam domains
         Sec.struct. author ....hhhhhh....eee.........eeeee...hhhhhhhhhhhhhhhhhhhhh.......eeee...hhhhhhhhhhhhhhh..eeeeee...hhhhhhhhhhh..eeeeehhhhhhhhhhhhhhhhhhhh...ee.......hhhhhhhhhhhhhhhhhhh...eeeeeee...hhhhhhhhhhhhhh.....eeeeeee...hhhhhhhhh......................hhhhh.eeeeehhhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhh..eeeeee............. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------------------------CYS_SYNTHASE       ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1y7l A   2 AIYADNSYSIGNTPLVRLKHFGHNGNVVVKIEGRNPSYSVkCRIGANMVWQAEKDGTLTKGKEIVDATSGNTGIALAYVAAARGYKITLTMPETMSLERKRLLCGLGVNLVLTEGAKGMKGAIAKAEEIVASDPSRYVMLKQFENPANPQIHRETTGPEIWKDTDGKVDVVVAGVGTGGSITGISRAIKLDFGKQITSVAVEPVESPVISQTLAGEEVKPGPHKIQGIGAGFIPKNLDLSIIDRVETVDSDTALATARRLMAEEGILAGISSGAAVAAADRLAKLPEFADKLIVVILPSASERYLSTALF 311
                                    11        21        31        41|       51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311
                                                                   42-LLP                                                                                                                                                                                                                                                                         

Chain P from PDB  Type:PROTEIN  Length:4
 aligned with CYSE_HAEIN | P43886 from UniProtKB/Swiss-Prot  Length:267

    Alignment length:4
           CYSE_HAEIN   264 NLNI 267
               SCOP domains ---- SCOP domains
               CATH domains ---- CATH domains
               Pfam domains ---- Pfam domains
         Sec.struct. author .... Sec.struct. author
                 SAPs(SNPs) ---- SAPs(SNPs)
                    PROSITE ---- PROSITE
                 Transcript ---- Transcript
                 1y7l P 264 NLNI 267

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric Unit

(-) CATH Domains  (1, 2)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 1)

Asymmetric Unit

(-) Gene Ontology  (12, 17)

Asymmetric Unit(hide GO term definitions)
Chain A   (CYSK_HAEIN | P45040)
molecular function
    GO:0080146    L-cysteine desulfhydrase activity    Catalysis of the reaction: L-cysteine + H2O = ammonia + pyruvate + hydrogen sulfide + H+.
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0004124    cysteine synthase activity    Catalysis of the reaction: O3-acetyl-L-serine + hydrogen sulfide = L-cysteine + acetate.
    GO:0030170    pyridoxal phosphate binding    Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
    GO:0016740    transferase activity    Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
biological process
    GO:0008652    cellular amino acid biosynthetic process    The chemical reactions and pathways resulting in the formation of amino acids, organic acids containing one or more amino substituents.
    GO:0019344    cysteine biosynthetic process    The chemical reactions and pathways resulting in the formation of cysteine, 2-amino-3-mercaptopropanoic acid.
    GO:0006535    cysteine biosynthetic process from serine    The chemical reactions and pathways resulting in the formation of cysteine from other compounds, including serine.
    GO:0008152    metabolic process    The chemical reactions and pathways, including anabolism and catabolism, by which living organisms transform chemical substances. Metabolic processes typically transform small molecules, but also include macromolecular processes such as DNA repair and replication, and protein synthesis and degradation.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

Chain P   (CYSE_HAEIN | P43886)
molecular function
    GO:0009001    serine O-acetyltransferase activity    Catalysis of the reaction: L-serine + acetyl-CoA = O-acetyl-L-serine + CoA.
    GO:0016740    transferase activity    Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
    GO:0016746    transferase activity, transferring acyl groups    Catalysis of the transfer of an acyl group from one compound (donor) to another (acceptor).
biological process
    GO:0008652    cellular amino acid biosynthetic process    The chemical reactions and pathways resulting in the formation of amino acids, organic acids containing one or more amino substituents.
    GO:0019344    cysteine biosynthetic process    The chemical reactions and pathways resulting in the formation of cysteine, 2-amino-3-mercaptopropanoic acid.
    GO:0006535    cysteine biosynthetic process from serine    The chemical reactions and pathways resulting in the formation of cysteine from other compounds, including serine.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CYSE_HAEIN | P438861s80 1ssm 1ssq 1sst
        CYSK_HAEIN | P450403iqg 3iqh 3iqi 4ho1 4li3 4nu8 4ore 4zu1 4zu6 5dbe 5dbh

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