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(-) Description

Title :  HYPOXANTHINE GUANINE XANTHINE
 
Authors :  M. A. Schumacher, D. Carter, D. Roos, B. Ullman, R. G. Brennan
Date :  13 Feb 96  (Deposition) - 03 Dec 97  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym./Biol. Unit :  A,B,C,D
Keywords :  Transferase, Glycosyltransferase, Purine Salvage (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  M. A. Schumacher, D. Carter, D. S. Ross, B. Ullman, R. G. Brennan
Crystal Structures Of Toxoplasma Gondii Hgxprtase Reveal The Catalytic Role Of A Long Flexible Loop.
Nat. Struct. Biol. V. 3 881 1996
PubMed-ID: 8836106  |  Reference-DOI: 10.1038/NSB1096-881
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - HYPOXANTHINE GUANINE XANTHINE PHOSPHORIBOSYLTRANSFERASE
    Chains: A, B, C, D
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Organism Scientific: TOXOPLASMA GONDII
    Organism Taxid: 5811
    Other Details: APO FORM
    Synonym: HGXPRTASE

 Structural Features

(-) Chains, Units

  1234
Asymmetric/Biological Unit : ABCD

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 4)

Asymmetric/Biological Unit (1, 4)
No.NameCountTypeFull Name
1MG4Ligand/IonMAGNESIUM ION

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLU A:146 , ASP A:147 , ILE A:148 , HOH A:323BINDING SITE FOR RESIDUE MG A 232
2AC2SOFTWAREGLU B:146 , ASP B:147BINDING SITE FOR RESIDUE MG B 232
3AC3SOFTWAREGLU C:146 , ASP C:147BINDING SITE FOR RESIDUE MG C 232
4AC4SOFTWAREGLU D:146 , ASP D:147BINDING SITE FOR RESIDUE MG D 232

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 4)

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

(-) Exons   (0, 0)

(no "Exon" information available for 1DBR)

(-) 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:227
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:230
                                                                                                                                                                                                                                                              230 
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221        |-
           HGXR_TOXGO     2 ASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK-   -
               SCOP domains d1dbra_ A: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                        SCOP domains
               CATH domains 1dbrA00 A:2-231  [code=3.40.50.2020, no name defined]                                                                                                                                                                                  CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........................hhh....hhhhhh.......hhhhhhhhhhhhhhhhhhh.....eeeeee.hhhhhhhhhhhhhhhhhhh..........eeeeee.---...............hhhh...eeeeee......hhhhhhhhhhhhh...eeeeee.eeee.............eeee.........................hhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR----------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1dbr A   2 ASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRL---QNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEKV 231
                                    11        21        31        41        51        61        71        81        91       101       111   |   121       131       141       151       161       171       181       191       201       211       221       231
                                                                                                                                           115 119                                                                                                                


Chain B from PDB  Type:PROTEIN  Length:219
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:230
                                                                                                                                                                                                                                                              230 
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221        |-
           HGXR_TOXGO     2 ASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK-   -
               SCOP domains d1dbrb_ B: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                        SCOP domains
               CATH domains 1dbrB00 B:2-231  [code=3.40.50.2020, no name defined]                                                                                                                                                                                  CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........................hhh....hhh..........hhhhhhhhhhhhhhhhhhh....eeeeee....hhhhhhhhhhhhhhhh...........eeeee..-----------........hhh...eeeeee......hhhhhhhhhhhhh...eeeeee.eee..............eee..........................hhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR----------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1dbr B   2 ASKPIEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRL-----------LTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEKV 231
                                    11        21        31        41        51        61        71        81        91       101       111   |     -     | 131       141       151       161       171       181       191       201       211       221       231
                                                                                                                                           115         127                                                                                                        


Chain C from PDB  Type:PROTEIN  Length:215
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:226
                                                                                                                                                                                                                                                          230 
                                    15        25        35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225    | 
           HGXR_TOXGO     6 IEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK-   -
               SCOP domains d1dbrc_ C: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                    SCOP domains
               CATH domains 1dbrC00 C:6-231  [code=3.40.50.2020, no name defined]                                                                                                                                                                              CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......................hhh....hhh.....eeee.hhhhhhhhhhhhhhhhhhh.....eeeee....hhhhhhhhhhhhhhhhh..........eeeee..-----------..............eeeeee........hhhhhhhhhhh...eeeeee.eee..............eee.....................eee..hhhhhhh... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR----------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1dbr C   6 IEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRL-----------LTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEKV 231
                                    15        25        35        45        55        65        75        85        95       105       115         - |     135       145       155       165       175       185       195       205       215       225      
                                                                                                                                       115         127                                                                                                        


Chain D from PDB  Type:PROTEIN  Length:215
 aligned with HGXR_TOXGO | Q26997 from UniProtKB/Swiss-Prot  Length:230

    Alignment length:226
                                                                                                                                                                                                                                                          230 
                                    15        25        35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225    | 
           HGXR_TOXGO     6 IEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRLKSYQNDNSTGQLTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEK-   -
               SCOP domains d1dbrd_ D: Hypoxanthine-guanine-xanthine PRTase                                                                                                                                                                                    SCOP domains
               CATH domains 1dbrD00 D:6-231  [code=3.40.50.2020, no name defined]                                                                                                                                                                              CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......................hhh....hhhhhh..eeee.hhhhhhhhhhhhhhhhhh.....eeeeee..hhhhhhhhhhhhhhhhhhh..........eeeee..-----------.......hhhh...eeeeee......hhhhhhhhhhhhh...eeeeee.eeee.............eeee....................eee..hhhhhh.... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------PUR_PYR_PR_TR----------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1dbr D   6 IEDYGKGKGRIEPMYIPDNTFYNADDFLVPPHCKPYIDKILLPGGLVKDRVEKLAYDIHRTYFGEELHIICILKGSRGFFNLLIDYLATIQKYSGRESSVPPFFEHYVRL-----------LTVLSDDLSIFRDKHVLIVEDIVDTGFTLTEFGERLKAVGPKSMRIATLVEKRTDRSNSLKGDFVGFSIEDVWIVGCCYDFNEMFRDFDHVAVLSDAARKKFEKV 231
                                    15        25        35        45        55        65        75        85        95       105       115         - |     135       145       155       165       175       185       195       205       215       225      
                                                                                                                                       115         127
   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, 4)

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

(-) CATH Domains  (1, 4)

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

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (13, 13)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B,C,D   (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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 Related Entries

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

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

(-) Related Entries Specified in the PDB File

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