1ORB

ACTIVE SITE STRUCTURAL FEATURES FOR CHEMICALLY MODIFIED FORMS OF RHODANESE

PDB DOI: 10.2210/pdb1ORB/pdb

Classification: SULFURTRANSFERASE
Organism(s): Bos taurus
Mutation(s): No

Deposited: 1995-07-24 Released: 1995-10-15
Deposition Author(s): Gliubich, F., Gazerro, M., Zanotti, G., Delbono, S., Berni, R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Observed: 0.187

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Active site structural features for chemically modified forms of rhodanese.

Gliubich, F., Gazerro, M., Zanotti, G., Delbono, S., Bombieri, G., Berni, R.

(1996) J Biol Chem 271: 21054-21061

PubMed: 8702871 Search on PubMed
DOI: 10.1074/jbc.271.35.21054
Primary Citation of Related Structures:
1ORB, 2ORA

PubMed Abstract:

In the course of the reaction catalyzed by rhodanese, the enzyme cycles between two catalytic intermediates, the sulfur-free and the sulfur-substituted (persulfide-containing) forms. The crystal structure of sulfur-free rhodanese, which was prepared in solution and then crystallized, is highly similar to that of sulfur-substituted enzyme. The inactivation of sulfur-free rhodanese with a small molar excess of hydrogen peroxide relies essentially on a modification limited to the active site, consisting of the oxidation of the essential sulfhydryl to sulfenyl group (-S-OH). Upon reaction of the sulfur-free enzyme with monoiodoacetate in the crystal, the Cys-247 side chain with the bound carboxymethyl group is forced into a conformation that allows favorable interactions of the carboxylate with the four peptide NH groups that participate in hydrogen bonding interactions with the transferable sulfur atom of the persulfide group in the sulfur-substituted rhodanese. It is concluded that active site-specific chemical modifications of sulfur-free rhodanese do not lead to significant changes of the protein structure, consistent with a high degree of similarity of the structures of the sulfur-free and sulfur-substituted forms of the enzyme both in solution and in the crystal.

Related Citations:

The High Resolution Three-Dimensional Structure of Bovine Liver Rhodanese
Hol, W.G.J., Lijk, L.J., Kalk, K.H.
(1983) Fundam Appl Toxicol 3: 370

The Structure of Bovine Liver Rhodanese: The Active Site in the Sulfur-Substituted and the Sulfur-Free Enzyme
Ploegman, J.H., Drent, G., Kalk, K.H., Hol, W.G.J.
(1979) J Mol Biol 127: 149

The Covalent and Tertiary Structure of Bovine Liver Rhodanese
Ploegman, J.H., Drent, G., Kalk, K.H., Hol, W.G.J., Heinrikson, W.G.J., Keim, R.L., Weng, P.S., Russel, J.
(1978) Nature 273: 124

Organizational Affiliation:

Department of Organic Chemistry, University of Padova and Biopolymer Research Center, Consiglio Nazionale delle Ricerche, 35131 Padova, Italy.

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBOXYMETHYLATED RHODANESE	A	296	Bos taurus	Mutation(s): 0 Gene Names: TST EC: 2.8.1.1
UniProt
Find proteins for P00586 (Bos taurus) Explore P00586 Go to UniProtKB: P00586
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P00586
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
ACT Query on ACT Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A]	B [auth A]	ACETATE ION C₂ H₃ O₂ QTBSBXVTEAMEQO-UHFFFAOYSA-M		Ligand Interaction