ISDA

Entry Detail

PDB ID:

1DWO

Keywords:

Title:

Crystal Structure of Hydroxynitrile Lyase from Manihot esculenta in Complex with Substrates Acetone and Chloroacetone:Implications for the Mechanism of Cyanogenesis

Biological Source:

Source Organism:

MANIHOT ESCULENTA

Host Organism:

ESCHERICHIA COLI

PDB Version:

Deposition Date:

1999-12-10

Release Date:

2000-12-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.20 Å

R-Value Free:

0.25

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 41 21 2

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:HYDROXYNITRILE LYASE
Chain IDs:A, B
Chain Length:262
Number of Molecules:2
Biological Source:MANIHOT ESCULENTA

UniProt ID:P52705 Pfam ID:PF00561 EC:4.1.2.47

Ligand Molecules

ACN

Primary Citation

Structure of Hydroxynitrile Lyase from Manihot Esculenta in Complex with Substrates Acetone and Chloroacetone: Implications for the Mechanism of Cyanogenesis

Lauble, H, Forster, S, Miehlich, B, Wajant, H, Effenberger, F.Show

Acta Crystallogr.,Sect.D 57 194 ? (2001)

PMID: 11173464 DOI: 10.1107/S0907444900015766

Abstact

The crystal structures of hydroxynitrile lyase from Manihot esculenta (MeHNL) complexed with the native substrate acetone and substrate analogue chloroacetone have been determined and refined at 2.2 A resolution. The substrates are positioned in the active site by hydrogen-bond interactions of the carbonyl O atom with Thr11 OG, Ser80 OG and, to a lesser extent, Cys81 SG. These studies support a mechanism for cyanogenesis as well as for the stereospecific MeHNL-catalyzed formation of (S)-cyanohydrins, which closely resembles the base-catalyzed chemical reaction of HCN with carbonyl compounds.

Legend

Protein

Chemical

Disease

Primary Citation of related structures