1N1M image
Entry Detail
PDB ID:
1N1M
Keywords:
HYDROLASE
Title:
Human Dipeptidyl Peptidase IV/CD26 in complex with an inhibitor
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Trichoplusia ni
PDB Version:
Deposition Date:
2002-10-18
Release Date:
2002-12-27
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 21 21 21
1N1M validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Dipeptidyl peptidase IV SOLUBLE FORM
Chain IDs:A, B
Chain Length:728
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P27487 Pfam ID:PF00930, PF00326 EC:3.4.14.5
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Ligand Molecules
A3M
HG
NAG
Primary Citation
Crystal structure of human dipeptidyl peptidase IV/CD26 in complex with a substrate analogue
Nat.Struct.Biol. 10 19 25 (2003)
PMID: 12483204 DOI: 10.1038/nsb882

Abstact

Dipeptidyl peptidase IV (DPP-IV/CD26) is a multifunctional type II transmembrane serine peptidase. This enzyme contributes to the regulation of various physiological processes, including blood sugar homeostasis, by cleaving peptide hormones, chemokines and neuropeptides. We have determined the 2.5 A structure of the extracellular region of DPP-IV in complex with the inhibitor valine-pyrrolidide. The catalytic site is located in a large cavity formed between the alpha/beta-hydrolase domain and an eight-bladed beta-propeller domain. Both domains participate in inhibitor binding. The structure indicates how substrate specificity is achieved and reveals a new and unexpected opening to the active site.

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Primary Citation of related structures
1N1M