ISDA

Deposition Date 1996-05-04

Release Date 1997-01-11

Last Version Date 2024-11-20

Entry Detail

PDB ID:

1MEG

Keywords:

HYDROLASE

Title:

CRYSTAL STRUCTURE OF A CARICAIN D158E MUTANT IN COMPLEX WITH E-64

Biological Source:

Source Organism:

Carica papaya (Taxon ID: 3649)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

C 1 2 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CARICAIN
Mutagens:D158E
Chain IDs:A
Chain Length:216
Number of Molecules:1
Biological Source:Carica papaya

UniProt ID:P10056 Pfam ID:PF00112 EC:3.4.22.30

Ligand Molecules

E64

EOH

Primary Citation

Crystal structure of a caricain D158E mutant in complex with E-64.

Katerelos, N.A, Taylor, M.A, Scott, M, Goodenough, P.W, Pickersgill, R.W, Katerelos, A, Goodenough, P.W, Taylor, M.A, Baker, K.C, Connerton, I.F, Cummings, N.J, Harris, G.W, Henderson, I.M, Jones, S.T, Pickersgill, R.W, Sumner, I.G, Warwicker, J, al, et,Revell, D.F, Cummings, N.J, Baker, K.C, Collins, M.E, Taylor, M.A, Sumner, I.G, Pickersgill, R.W, Connerton, I.F, Goodenough, P.W, Taylor, M.A, Pratt, K.A, Revell, D.F, Baker, K.C, Sumner, I.G, Goodenough, P.W.Show

FEBS Lett. 392 35 39 (1996)

PMID: 8769310 DOI: 10.1016/0014-5793(96)00697-7

Abstact

The structure of the D158E mutant of caricain (previously known as papaya protease omega) in complex with E-64 has been determined at 2.0 A resolution (overall R factor 19.3%). The structure reveals that the substituted glutamate makes the same pattern of hydrogen bonds as the aspartate in native caricain. This was not anticipated since in the native structure there is insufficient room to accommodate the glutamate side chain. The glutamate is accommodated in the mutant by a local expansion of the structure demonstrating that small structural changes are responsible for the change in activity.

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Primary Citation of related structures