Structure of PDB 1r3u Chain B Binding Site BS01

Receptor Information

>1r3u Chain B (length=178) Species: 119072 (Caldanaerobacter subterraneus subsp. tengcongensis)

SPMEDIEEILITEEQLKAKVKELGEMITRDYEGKDLVLIGVLKGAIMFMS
GLSRAIDLPLSIDFLAVSSYGSSTKSSGIVKIIKDHDIDIEGKDVLIVED
IIDSGLTLAYLRETLLGRKPRSLKICTILDKPERREADVKVDYCGFKIPD
KFVVGYGLDYAEKYRNLPFIGVLKPELY

Ligand information

• Ligand ID: MG
• InChI: InChI=1S/Mg/q+2
• InChIKey: JLVVSXFLKOJNIY-UHFFFAOYSA-N
• SMILES:
  ACDLabs 10.04
  OpenEye OEToolkits 1.5.0: [Mg+2]
  CACTVS 3.341: [Mg++]
• Formula: Mg
• Name: MAGNESIUM ION
• DrugBank: DB01378
• PDB chain: 1r3u Chain B Residue 1190

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1r3u Crystal Structure of Hypoxanthine-Guanine Phosphoribosyltransferase from Thermoanaerobacter tengcongensis
• Resolution: 2.5 Å
• Binding residue (original residue number in PDB): E101 D102
• Binding residue (residue number reindexed from 1): E99 D100
• Annotation score: 1

Enzymatic activity

• Catalytic site (original residue number in PDB): E101 D102 D105 F154 R167
• Catalytic site (residue number reindexed from 1): E99 D100 D103 F152 R165
• Enzyme Commision number: 2.4.2.8: hypoxanthine phosphoribosyltransferase.

Gene Ontology

Molecular Function

• GO:0000166 nucleotide binding
• GO:0000287 magnesium ion binding
• GO:0004422 hypoxanthine phosphoribosyltransferase activity
• GO:0016757 glycosyltransferase activity
• GO:0046872 metal ion binding
• GO:0052657 guanine phosphoribosyltransferase activity

Biological Process

• GO:0006166 purine ribonucleoside salvage
• GO:0006178 guanine salvage
• GO:0032263 GMP salvage
• GO:0032264 IMP salvage
• GO:0046100 hypoxanthine metabolic process

Cellular Component

• GO:0005737 cytoplasm
• GO:0005829 cytosol

External links

• PDB: RCSB:1r3u, PDBe:1r3u, PDBj:1r3u
• PDBsum: 1r3u
• UniProt: Q8R7L0