ISDA: 2ER6

Deposition Date 1990-10-13

Release Date 1991-01-15

Last Version Date 2024-11-20

Entry Detail

PDB ID:

2ER6

Keywords:

HYDROLASE/HYDROLASE INHIBITOR

Title:

The structure of a synthetic pepsin inhibitor complexed with endothiapepsin.

Biological Source:

Source Organism:

Cryphonectria parasitica (Taxon ID: 5116)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Work:

0.2

Space Group:

P 1 21 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:ENDOTHIAPEPSIN
Gene (Uniprot):EAPA
Chain IDs:A (auth: E)
Chain Length:330
Number of Molecules:1
Biological Source:Cryphonectria parasitica

UniProt ID:P11838 Pfam ID:PF00026 EC:3.4.23.22

Peptide-like Molecules

PRD_000346

Primary Citation

The structure of a synthetic pepsin inhibitor complexed with endothiapepsin

Cooper, J, Foundling, S, Hemmings, A, Blundell, T, Jones, D.M, Hallett, A, Szelke, M, Pearl, L, Blundell, T, Blundell, T.L, Jones, H.B, Khan, G, Taylor, G, Sewell, T.S, Pearl, L.H, Wood, S.P, Blundell, T.L, Jenkins, J.A, Khan, G, Roychowdhury, P, Sewell, T, Tickle, I.J, Wood, E.A, Blundell, T.L, Sewell, B.T, Mclachlan, A.D, Tang, J, James, M.N.G, Hsu, I.N, Jenkins, J.A, Blundell, T.L, Subramanian, E, Swan, I.D.A, Liu, M, Davies, D.R, Jenkins, J.A, Tickle, I.J, Blundell, T.L, Jenkins, J, Tickle, I, Sewell, T, Ungaretti, L, Wollmer, A, Blundell, T.Show

Eur.J.Biochem. 169 215 221 (1987)

PMID: 3119339 DOI: 10.1111/j.1432-1033.1987.tb13600.x

Abstact

The conformation of a synthetic polypeptide inhibitor, bound to the active site of the fungal aspartic proteinase endothiapepsin (EC 3.4.23.6), has been determined by X-ray diffraction at 0.20-nm resolution and refined to an agreement factor of 0.20. The inhibitor: Pro Thr Glu Phe-R-Phe Arg Glu (R = -CH2NH-) is based on a chromogenic substrate of pepsin (EC 3.4.23.1). It has, in place of the scissile bond, a reduced peptide group which is resistant to hydrolysis and mimics the tetrahedral transition state. The inhibitor binds in an extended conformation with the reduced bond close to the essential aspartate side-chains of the enzyme. The hydrogen bonds and hydrophobic interactions between the enzyme and the inhibitor do not induce large conformational changes.

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Protein

Chemical

Disease

Primary Citation of related structures

Abstact

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