1v2h Summary

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Crystal structure of human PNP complexed with guanine

The structure was published by de Azevedo Jr., W.F., Canduri, F., dos Santos, D.M., et al., Basso, L.A., Palma, M.S., and Santos, D.S., in 2003 in a paper entitled "Crystal structure of human PNP complexed with guanine." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 2.7 Å and deposited in 2003.

The experimental data on which the structure is based was also deposited.

The PDB entry contains the structure of Purine nucleoside phosphorylase. This molecule has the UniProt identifier P00491 (PNPH_HUMAN)search. The sample contained 288 residues which is 100% of the natural sequence. Out of 288 residues 288 were observed and are deposited in the PDB.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms homotrimers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
E Purine nucleoside phosphorylase P00491 (2-289) (PNPH_HUMAN)search Homo sapienssearch 100% 288 100%


This entry contains 1 unique UniProt protein:

UniProt accession Name Organism PDB
P00491 (2 - 289) Purine nucleoside phosphorylase Homo sapiens

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
E (P00491) Purine and uridine phosphorylasessearch Rossmann foldsearch PF01048: Phosphorylase superfamilysearch

Chain ID Molecular function (GO) Biological process (GO) Cellular component (GO)
E (P00491) transferase activity, transferring pentosyl groupssearch purine-nucleoside phosphorylase activitysearch transferase activitysearch transferase activity, transferring glycosyl groupssearch phosphate ion bindingsearch nucleoside bindingsearch purine nucleobase bindingsearch drug bindingsearch catalytic activitysearch nucleobase-containing compound metabolic processsearch purine nucleobase metabolic processsearch immune responsesearch positive regulation of T cell proliferationsearch inosine catabolic processsearch interleukin-2 secretionsearch nicotinamide riboside catabolic processsearch positive regulation of alpha-beta T cell differentiationsearch NAD biosynthesis via nicotinamide riboside salvage pathwaysearch urate biosynthetic processsearch response to drugsearch small molecule metabolic processsearch purine-containing compound salvagesearch purine nucleotide catabolic processsearch nucleobase-containing small molecule metabolic processsearch nucleoside metabolic processsearch cytosolsearch extracellular vesicular exosomesearch cytoskeletonsearch cytoplasmsearch intracellularsearch

Chain InterPro annotation
E Nucleoside phosphorylase domainsearch PNP/MTAP phosphorylasesearch Purine nucleoside phosphorylasesearch Purine nucleoside phosphorylase I, inosine/guanosine-specificsearch Purine phosphorylase, family 2, conserved sitesearch