ISDA

Deposition Date 1993-06-24

Release Date 1993-10-31

Last Version Date 2024-10-23

Entry Detail

PDB ID:

1POP

Keywords:

HYDROLASE/HYDROLASE INHIBITOR

Title:

X-RAY CRYSTALLOGRAPHIC STRUCTURE OF A PAPAIN-LEUPEPTIN COMPLEX

Biological Source:

Source Organism:

Carica papaya (Taxon ID: 3649)
Streptomyces roseus (Taxon ID: 66430)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.10 Å

Space Group:

P 21 21 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PAPAIN
Chain IDs:A
Chain Length:212
Number of Molecules:1
Biological Source:Carica papaya

UniProt ID:P00784 Pfam ID:PF00112 EC:3.4.22.2

Polymer Type:polypeptide(L)
Molecule:LEUPEPTIN
Chain IDs:B
Chain Length:4
Number of Molecules:1
Biological Source:Streptomyces roseus

Ligand Molecules

MOH

Peptide-like Molecules

PRD_000216

Primary Citation

X-ray crystallographic structure of a papain-leupeptin complex.

Schroder, E, Phillips, C, Garman, E, Harlos, K, Crawford, C, Kamphuis, I.G, Kalk, K.H, Swarte, M.B.A, Drenth, J.Show

FEBS Lett. 315 38 42 (1993)

PMID: 8416808 DOI: 10.1016/0014-5793(93)81128-M

Abstact

The three-dimensional structure of the papain-leupeptin complex has been determined by X-ray crystallography to a resolution of 2.1 A (overall R-factor = 19.8%). The structure indicates that: (i) leupeptin contacts the S subsites of the papain active site and not the S' subsites; (ii) the 'carbonyl' carbon atom of the inhibitor is covalently bound by the Cys-25 sulphur atom of papain and is tetrahedrally coordinated; (iii) the 'carbonyl' oxygen atom of the inhibitor faces the oxyanion hole and makes hydrogen bond contacts with Gln-19 and Cys-25.

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Primary Citation of related structures