4YSB

Crystal structure of ETHE1 from Myxococcus xanthus

Summary for 4YSB

• Entry DOI: 10.2210/pdb4ysb/pdb
• Descriptor: Metallo-beta-lactamase family protein, FE (III) ION (3 entities in total)
• Functional Keywords: sulfur dioxygenase, glutathione, ethe1, hydrolase
• Biological source: Myxococcus xanthus (strain DK 1622)
• Total number of polymer chains: 2
• Total formula weight: 51350.93

Authors

Sattler, S.A.,Wang, X.,DeHan, P.J.,Xun, L.,Kang, C. (deposition date: 2015-03-17, release date: 2015-06-24, Last modification date: 2024-02-28)

Primary citation

Sattler, S.A.,Wang, X.,Lewis, K.M.,DeHan, P.J.,Park, C.M.,Xin, Y.,Liu, H.,Xian, M.,Xun, L.,Kang, C.
Characterizations of Two Bacterial Persulfide Dioxygenases of the Metallo-beta-lactamase Superfamily.
J.Biol.Chem., 290:18914-18923, 2015

PubMed Abstract: Persulfide dioxygenases (PDOs), also known as sulfur dioxygenases (SDOs), oxidize glutathione persulfide (GSSH) to sulfite and GSH. PDOs belong to the metallo-β-lactamase superfamily and play critical roles in animals, plants, and microorganisms, including sulfide detoxification. The structures of two PDOs from human and Arabidopsis thaliana have been reported; however, little is known about the substrate binding and catalytic mechanism. The crystal structures of two bacterial PDOs from Pseudomonas putida and Myxococcus xanthus were determined at 1.5- and 2.5-Å resolution, respectively. The structures of both PDOs were homodimers, and their metal centers and β-lactamase folds were superimposable with those of related enzymes, especially the glyoxalases II. The PDOs share similar Fe(II) coordination and a secondary coordination sphere-based hydrogen bond network that is absent in glyoxalases II, in which the corresponding residues are involved instead in coordinating a second metal ion. The crystal structure of the complex between the Pseudomonas PDO and GSH also reveals the similarity of substrate binding between it and glyoxalases II. Further analysis implicates an identical mode of substrate binding by known PDOs. Thus, the data not only reveal the differences in metal binding and coordination between the dioxygenases and the hydrolytic enzymes in the metallo-β-lactamase superfamily, but also provide detailed information on substrate binding by PDOs.

PubMed: 26082492
DOI: 10.1074/jbc.M115.652537

Experimental method

X-RAY DIFFRACTION (2.5015 Å)