Structure of PDB 1tc2 Chain B Binding Site BS01

Receptor Information

>1tc2 Chain B (length=196) Species: 5693 (Trypanosoma cruzi)

REYEFAEKILFTEEEIRTRIKEVAKRIADDYKGKGLRPYVNPLVLISVLK
GSFMFTADLCRALCDFNVPVRMEFICVSSYGEGLTSSGQVRMLLDTRHSI
EGHHVLIVEDIVDTALTLNYLYHMYFTRRPASLKTVVLLDKREGRRVPFS
ADYVVANIPNAFVIGYGLDYDDTYRELRDIVVLRPEVYAEREAARQ

Ligand information

• Ligand ID: 7HP
• InChI: InChI=1S/C5H4N4O/c10-5-4-3(1-8-9-4)6-2-7-5/h1-2H,(H,8,9)(H,6,7,10)
• InChIKey: JFZSDNLQDTYVEE-UHFFFAOYSA-N
• SMILES:
  ACDLabs 10.04: n1c(O)c2c(nc1)cnn2
  CACTVS 3.341: Oc1ncnc2cn[nH]c12
  OpenEye OEToolkits 1.5.0: c1c2c(c(ncn2)O)[nH]n1
• Formula: C5 H4 N4 O
• Name: 7-HYDROXY-PYRAZOLO[4,3-D]PYRIMIDINE
• ZINC: ZINC000011592630
• PDB chain: 1tc2 Chain B Residue 810

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1tc2 Approaching the transition state in the crystal structure of a phosphoribosyltransferase.
• Resolution: 1.81 Å
• Binding residue (original residue number in PDB): Y582 D615 K643 F664 V665
• Binding residue (residue number reindexed from 1): Y80 D113 K141 F162 V163
• Annotation score: 1

Enzymatic activity

• Catalytic site (original residue number in PDB): E611 D612 D615 F664 R677
• Catalytic site (residue number reindexed from 1): E109 D110 D113 F162 R175
• 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:1tc2, PDBe:1tc2, PDBj:1tc2
• PDBsum: 1tc2
• PubMed: 9860824
• UniProt: Q4DRC4