PDBsum entry 1th0

Cell cycle, hydrolase

PDB id: 1th0

Contents

Protein chain

226 a.a. *

Waters ×209

* Residue conservation analysis

References listed in PDB file

Key reference

• Title: A basis for sumo protease specificity provided by analysis of human senp2 and a senp2-Sumo complex.
• Authors: D.Reverter, C.D.Lima.
• Ref.: Structure, 2004, 12, 1519-1531. [DOI no: 10.1016/j.str.2004.05.023]
• PubMed id: 15296745

Abstract

Modification of cellular proteins by the ubiquitin-like protein SUMO is essential for nuclear metabolism and cell cycle progression in yeast. X-ray structures of the human Senp2 catalytic protease domain and of a covalent thiohemiacetal transition-state complex obtained between the Senp2 catalytic domain and SUMO-1 revealed details of the respective protease and substrate surfaces utilized in interactions between these two proteins. Comparative biochemical and structural analysis between Senp2 and the yeast SUMO protease Ulp1 revealed differential abilities to process SUMO-1, SUMO-2, and SUMO-3 in maturation and deconjugation reactions. Further biochemical characterization of the three SUMO isoforms into which an additional Gly-Gly di-peptide was inserted, or whereby the respective SUMO tails from the three isoforms were swapped, suggests a strict dependence for SUMO isopeptidase activity on residues C-terminal to the conserved Gly-Gly motif and preferred cleavage site for SUMO proteases.

Figure 3.
Figure 3. Structural Superposition of Senp2 and the Senp2-SUMO-1 ComplexStereo representation of Senp2 alone (light blue) and Senp2 (dark blue) in complex with SUMO-1 made by superimposing the respective N-terminal Senp2 subdomains (see text for amino acid numbers). SUMO-1 is represented by a thin gray line. The Senp2 residues involved in interactions with SUMO-1 are labeled and shown in bond representation.

The above figure is reprinted by permission from Cell Press: Structure (2004, 12, 1519-1531) copyright 2004.