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(-) Description

Title :  CRYSTAL STRUCTURE OF CYSTEINE SYNTHASE (OASS) FROM ENTAMOEBA HISTOLYTICA AT 1.86 A RESOLUTION
 
Authors :  K. Chinthalapudi, N. Alam, S. Gourinath
Date :  02 May 07  (Deposition) - 15 Apr 08  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.86
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Oass, Cysteine Synthase, Plp, Lyase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  K. Chinthalapudi, M. Kumar, S. Kumar, S. Jain, N. Alam, S. Gourinath
Crystal Structure Of Native O-Acetyl-Serine Sulfhydrylase From Entamoeba Histolytica And Its Complex With Cysteine: Structural Evidence For Cysteine Binding And Lack Of Interactions With Serine Acetyl Transferase.
Proteins V. 72 1222 2008
PubMed-ID: 18350570  |  Reference-DOI: 10.1002/PROT.22013

(-) Compounds

Molecule 1 - CYSTEINE SYNTHASE
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21
    Expression System Plasmid: PET28A
    Expression System Strain: BL21
    Expression System Taxid: 511693
    Expression System Vector Type: PLASMID
    Gene: OASS
    Organism Scientific: ENTAMOEBA HISTOLYTICA
    Organism Taxid: 294381

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 4)

Asymmetric/Biological Unit (2, 4)
No.NameCountTypeFull Name
1PLP2Ligand/IonPYRIDOXAL-5'-PHOSPHATE
2SO42Ligand/IonSULFATE ION

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWARETHR A:85 , SER A:86 , GLY A:87 , GLN A:159 , HOH A:418 , HOH A:473BINDING SITE FOR RESIDUE SO4 A 344
2AC2SOFTWARETHR B:85 , SER B:86 , MET B:136 , GLN B:159BINDING SITE FOR RESIDUE SO4 B 344
3AC3SOFTWARELYS A:58 , ASN A:88 , ALA A:190 , GLY A:192 , THR A:193 , SER A:194 , GLY A:195 , THR A:196 , GLY A:236 , ILE A:237 , SER A:280 , PRO A:307 , SER A:308 , TYR A:313 , HOH A:347 , HOH A:348 , HOH A:374 , HOH A:445BINDING SITE FOR RESIDUE PLP A 345
4AC4SOFTWARELYS B:58 , ASN B:88 , ALA B:190 , GLY B:192 , THR B:193 , SER B:194 , GLY B:195 , THR B:196 , GLY B:236 , ILE B:237 , SER B:280 , PRO B:307 , SER B:308 , TYR B:313 , HOH B:346 , HOH B:356 , HOH B:370 , HOH B:506BINDING SITE FOR RESIDUE PLP B 345

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2PQM)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2PQM)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2PQM)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2PQM)

(-) Exons   (0, 0)

(no "Exon" information available for 2PQM)

(-) Sequences/Alignments

Asymmetric/Biological 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:338
 aligned with O15570_ENTHI | O15570 from UniProtKB/TrEMBL  Length:337

    Alignment length:338
                                                                                                                                                                                                                                                                                                                                                                         337  
                                    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       321       331     |  
         O15570_ENTHI     2 EQISISSPRKRIYHNILETIGGTPLVELHGVTEHPRIKKGTRILVKLEYFNPMSSVKDRVGFNIVYQAIKDGRLKPGMEIIESTSGNTGIALCQAGAVFGYRVNIAMPSTMSVERQMIMKAFGAELILTEGKKGMPGAIEEVNKMIKENPGKYFVANQFGNPDNTAAHHYTANEIWEDTDGEVDIVVSAVGTSGTVIGVAEKLKEKKKGIKIIAVEPEESAVLEGKAKGPHGIQGIGAGFIPDIYKKEFVDEIIPIKTQDAWKMARAVVKYDGIMCGMSSGAAILAGLKEAEKPENEGKTIVIIVPSCGERYLSTDLYKIKDEGTKIQILDSLLNE--   -
               SCOP domains d2pqma_ A: automated matches                                                                                                                                                                                                                                                                                                                       SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........ee.hhhhhh....eee.hhhhh........eeeeee.hhh....hhhhhhhhhhhhhhhh.......eeeee..hhhhhhhhhhhhhhh..eeeeee...hhhhhhhhhhh..eeeeehhhhhhhhhhhhhhhhhhhh...eee.....hhhhhhhhhhhhhhhhhhh...eeeeeee...hhhhhhhhhhhhhhh...eeeeeee.hhh........................hhhhh.eeeeehhhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhh..eeeeee..hhhhhh...........hhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2pqm A   2 EQISISSPRKRIYHNILETIGGTPLVELHGVTEHPRIKKGTRILVKLEYFNPMSSVKDRVGFNIVYQAIKDGRLKPGMEIIESTSGNTGIALCQAGAVFGYRVNIAMPSTMSVERQMIMKAFGAELILTEGKKGMPGAIEEVNKMIKENPGKYFVANQFGNPDNTAAHHYTANEIWEDTDGEVDIVVSAVGTSGTVIGVAEKLKEKKKGIKIIAVEPEESAVLEGKAKGPHGIQGIGAGFIPDIYKKEFVDEIIPIKTQDAWKMARAVVKYDGIMCGMSSGAAILAGLKEAEKPENEGKTIVIIVPSCGERYLSTDLYKIKDEGTKIQILDSLLNEHH 339
                                    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       321       331        


Chain B from PDB  Type:PROTEIN  Length:334
 aligned with O15570_ENTHI | O15570 from UniProtKB/TrEMBL  Length:337

    Alignment length:334
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332    
         O15570_ENTHI     3 QISISSPRKRIYHNILETIGGTPLVELHGVTEHPRIKKGTRILVKLEYFNPMSSVKDRVGFNIVYQAIKDGRLKPGMEIIESTSGNTGIALCQAGAVFGYRVNIAMPSTMSVERQMIMKAFGAELILTEGKKGMPGAIEEVNKMIKENPGKYFVANQFGNPDNTAAHHYTANEIWEDTDGEVDIVVSAVGTSGTVIGVAEKLKEKKKGIKIIAVEPEESAVLEGKAKGPHGIQGIGAGFIPDIYKKEFVDEIIPIKTQDAWKMARAVVKYDGIMCGMSSGAAILAGLKEAEKPENEGKTIVIIVPSCGERYLSTDLYKIKDEGTKIQILDSLLN 336
               SCOP domains d2pqmb_ B: automated matches                                                                                                                                                                                                                                                                                                                   SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) --------------PALP-2pqmB01 B:17-308                                                                                                                                                                                                                                                                               ---------------------------- Pfam domains (1)
           Pfam domains (2) --------------PALP-2pqmB02 B:17-308                                                                                                                                                                                                                                                                               ---------------------------- Pfam domains (2)
         Sec.struct. author ..........ee.hhhhhh....eee..............eeeeee.hhh....hhhhhhhhhhhhhhhh.......eeeee..hhhhhhhhhhhhhhh..eeeeee...hhhhhhhhhhh..eeeeehhhhhhhhhhhhhhhhhhhh...eee.....hhhhhhhhhhhhhhhhhhh.....eeeee...hhhhhhhhhhhhhhh...eeeeeee.hhh........................hhhhh.eeeeehhhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhh..eeeeee..hhhhhh...........hhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2pqm B   3 QISISSPRKRIYHNILETIGGTPLVELHGVTEHPRIKKGTRILVKLEYFNPMSSVKDRVGFNIVYQAIKDGRLKPGMEIIESTSGNTGIALCQAGAVFGYRVNIAMPSTMSVERQMIMKAFGAELILTEGKKGMPGAIEEVNKMIKENPGKYFVANQFGNPDNTAAHHYTANEIWEDTDGEVDIVVSAVGTSGTVIGVAEKLKEKKKGIKIIAVEPEESAVLEGKAKGPHGIQGIGAGFIPDIYKKEFVDEIIPIKTQDAWKMARAVVKYDGIMCGMSSGAAILAGLKEAEKPENEGKTIVIIVPSCGERYLSTDLYKIKDEGTKIQILDSLLN 336
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332
   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, 2)

Asymmetric/Biological Unit
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2PQM)

(-) Pfam Domains  (1, 2)

Asymmetric/Biological Unit
(-)
Clan: no clan defined [family: PALP] (67)

(-) Gene Ontology  (2, 2)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (O15570_ENTHI | O15570)
molecular function
    GO:0004124    cysteine synthase activity    Catalysis of the reaction: O3-acetyl-L-serine + hydrogen sulfide = L-cysteine + acetate.
biological process
    GO:0006535    cysteine biosynthetic process from serine    The chemical reactions and pathways resulting in the formation of cysteine from other compounds, including serine.

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  2pqm
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 Related Entries

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UniProtKB/TrEMBL
        O15570_ENTHI | O15570: 3bm5 4il5 4jbl 4jbn

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