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(-) Description

Title :  TOXOPLASMA GONDII HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE COMPLEXED WITH 9-DEAZAGUANINE, ALPHA-D-5-PHOSPHORIBOSYL-1-PYROPHOSPHATE (PRPP) AND TWO MG2+ IONS
 
Authors :  A. Heroux, E. L. White, L. J. Ross, A. P. Kuzin, D. W. Borhani
Date :  08 Sep 00  (Deposition) - 06 Dec 00  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.05
Chains :  Asym. Unit :  A,C
Biol. Unit 1:  A,C  (2x)
Keywords :  Glycosyltransferase, Purine Salvage, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  A. Heroux, E. L. White, L. J. Ross, A. P. Kuzin, D. W. Borhani
Substrate Deformation In A Hypoxanthine-Guanine Phosphoribosyltransferase Ternary Complex: The Structural Basis For Catalysis.
Structure Fold. Des. V. 8 1309 2000
PubMed-ID: 11188695  |  Reference-DOI: 10.1016/S0969-2126(00)00546-3
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE
    Chains: A, C
    EC Number: 2.4.2.8
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Plasmid: PETC1
    Expression System Strain: BL21(DE3)
    Expression System Taxid: 469008
    Expression System Vector: PET15B
    Expression System Vector Type: PLASMID
    Organism Scientific: TOXOPLASMA GONDII
    Organism Taxid: 383379
    Strain: RH
    Synonym: HGPRTASE

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AC
Biological Unit 1 (2x): AC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 8)

Asymmetric Unit (3, 8)
No.NameCountTypeFull Name
19DG2Ligand/Ion9-DEAZAGUANINE
2MG4Ligand/IonMAGNESIUM ION
3PRP2Ligand/IonALPHA-PHOSPHORIBOSYLPYROPHOSPHORIC ACID
Biological Unit 1 (2, 8)
No.NameCountTypeFull Name
19DG4Ligand/Ion9-DEAZAGUANINE
2MG-1Ligand/IonMAGNESIUM ION
3PRP4Ligand/IonALPHA-PHOSPHORIBOSYLPYROPHOSPHORIC ACID

(-) Sites  (8, 8)

Asymmetric Unit (8, 8)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPRP A:303 , HOH A:1930 , HOH A:1931BINDING SITE FOR RESIDUE MG A 301
2AC2SOFTWAREASP A:206 , PRP A:303 , HOH A:1932 , HOH A:1933 , HOH A:1934BINDING SITE FOR RESIDUE MG A 302
3AC3SOFTWAREPRP C:303 , HOH C:1935 , HOH C:1936BINDING SITE FOR RESIDUE MG C 301
4AC4SOFTWAREASP C:206 , PRP C:303 , HOH C:1937 , HOH C:1938 , HOH C:1939BINDING SITE FOR RESIDUE MG C 302
5AC5SOFTWARELYS A:79 , GLY A:80 , ARG A:114 , LYS A:116 , SER A:117 , TYR A:118 , GLU A:146 , ASP A:147 , ILE A:148 , ASP A:150 , THR A:151 , GLY A:152 , PHE A:153 , THR A:154 , ASP A:206 , ARG A:212 , MG A:301 , MG A:302 , 9DG A:304 , HOH A:1004 , HOH A:1009 , HOH A:1019 , HOH A:1045 , HOH A:1930 , HOH A:1931 , HOH A:1932 , HOH A:1933 , HOH A:1934BINDING SITE FOR RESIDUE PRP A 303
6AC6SOFTWARETYR A:118 , ASP A:150 , LYS A:178 , VAL A:198 , TRP A:199 , ILE A:200 , TYR A:205 , ASP A:206 , PRP A:303 , HOH A:1934BINDING SITE FOR RESIDUE 9DG A 304
7AC7SOFTWARELYS C:79 , GLY C:80 , ARG C:114 , LYS C:116 , SER C:117 , TYR C:118 , GLU C:146 , ASP C:147 , ILE C:148 , ASP C:150 , THR C:151 , GLY C:152 , THR C:154 , ASP C:206 , ARG C:212 , MG C:301 , MG C:302 , 9DG C:304 , HOH C:1070 , HOH C:1075 , HOH C:1085 , HOH C:1109 , HOH C:1935 , HOH C:1936 , HOH C:1937 , HOH C:1938 , HOH C:1939BINDING SITE FOR RESIDUE PRP C 303
8AC8SOFTWARETYR C:118 , ASP C:150 , LYS C:178 , TRP C:199 , ILE C:200 , TYR C:205 , ASP C:206 , PRP C:303 , HOH C:1939BINDING SITE FOR RESIDUE 9DG C 304

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (2, 2)

Asymmetric Unit
No.Residues
1Leu A:78 -Lys A:79
2Leu C:78 -Lys C:79

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PUR_PYR_PR_TRANSFERPS00103 Purine/pyrimidine phosphoribosyl transferases signature.HGXR_TOXGO142-154
 		  2A:142-154
C:142-154
Biological Unit 1 (1, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PUR_PYR_PR_TRANSFERPS00103 Purine/pyrimidine phosphoribosyl transferases signature.HGXR_TOXGO142-154
 		  4A:142-154
C:142-154

(-) Exons   (0, 0)

(no "Exon" information available for 1FSG)

(-) 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:233
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:233
                               1                                                                                                                                                                                                                                     
                               |     7        17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227   
           HGXR_TOXGO     - ---MASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK 230
               SCOP domains d1fsga_ A: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                           SCOP domains
               CATH domains 1fsgA00 A:0A-230  [code=3.40.50.2020, no name defined]                                                                                                                                                                                    CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhh.hhhhh.........ee......ee.hhh...........eeeehhhhhhhhhhhhhhhhhhhhh...eeeeeee..hhhhhhhhhhhhhhhhhhh.........eeeeeeeeeee..eeeeeeeee..hhhhhh..eeeeeeeee..hhhhhhhhhhhhh....eeeeeeeeee...........eeeeee....ee...............eee.hhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR---------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1fsg A  0A GSHMASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK 230
                            |||      7        17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227   
                            |||                                                                                                                                                                                                                                      
                           0A||                                                                                                                                                                                                                                      
                            0B|                                                                                                                                                                                                                                      
                             0C                                                                                                                                                                                                                                      


Chain C from PDB  Type:PROTEIN  Length:233
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:233
                               1                                                                                                                                                                                                                                     
                               |     7        17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227   
           HGXR_TOXGO     - ---MASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK 230
               SCOP domains d1fsgc_ C: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                           SCOP domains
               CATH domains 1fsgC00 C:0A-230  [code=3.40.50.2020, no name defined]                                                                                                                                                                                    CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhh.hhhhh.........ee......ee.hhh...........eeeehhhhhhhhhhhhhhhhhhhhh...eeeeeee..hhhhhhhhhhhhhhhhhhhh........eeeeeeeeeee..eeeeeeeeee.hhhhhh..eeeeeeeee..hhhhhhhhhhhhh....eeeeeeeeee...........eeeeee....ee...............eee.hhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR---------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1fsg C  0A GSHMASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK 230
                            |||      7        17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227   
                           0A||                                                                                                                                                                                                                                      
                            0B|                                                                                                                                                                                                                                      
                             0C
   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 Unit
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (1, 2)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1FSG)

(-) Gene Ontology  (13, 13)

Asymmetric Unit(hide GO term definitions)
Chain A,C   (HGXR_TOXGO | Q26997)
molecular function
    GO:0052657    guanine phosphoribosyltransferase activity    Catalysis of the reaction: GMP + diphosphate = guanine + 5-phospho-alpha-D-ribose 1-diphosphate.
    GO:0004422    hypoxanthine phosphoribosyltransferase activity    Catalysis of the reaction: IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0000166    nucleotide binding    Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
    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:0016757    transferase activity, transferring glycosyl groups    Catalysis of the transfer of a glycosyl group from one compound (donor) to another (acceptor).
    GO:0000310    xanthine phosphoribosyltransferase activity    Catalysis of the reaction: 5-phospho-alpha-D-ribose 1-diphosphate + xanthine = (9-D-ribosylxanthine)-5'-phosphate + diphosphate.
biological process
    GO:0032263    GMP salvage    Any process which produces guanosine monophosphate from derivatives of it, without de novo synthesis.
    GO:0032264    IMP salvage    Any process which produces inosine monophosphate from derivatives of it, without de novo synthesis.
    GO:0032265    XMP salvage    Any process which produces xanthosine monophosphate from derivatives of it, without de novo synthesis.
    GO:0009116    nucleoside metabolic process    The chemical reactions and pathways involving a nucleoside, a nucleobase linked to either beta-D-ribofuranose (a ribonucleoside) or 2-deoxy-beta-D-ribofuranose, (a deoxyribonucleoside), e.g. adenosine, guanosine, inosine, cytidine, uridine and deoxyadenosine, deoxyguanosine, deoxycytidine and thymidine (= deoxythymidine).
    GO:0006166    purine ribonucleoside salvage    Any process which produces a purine nucleoside from derivatives of it, without de novo synthesis.
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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  1fsg
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  HGXR_TOXGO | Q26997
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 Related Entries

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

UniProtKB/Swiss-Prot
        HGXR_TOXGO | Q26997: 1dbr 1qk3 1qk4 1qk5

(-) Related Entries Specified in the PDB File

1bzy 1BZY IS HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE
1dbr 1DBR IS HYPOXANTHINE GUANINE XANTHINE PHOSPHORIBOSYLTRANSFERASE
1hmp 1HMP IS HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE
1qk3 1QK3 IS HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE
1qk4 1QK4 IS HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE
1qk5 1QK5 IS HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE
1tc2 1TC2 IS HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE