6A2U

Crystal structure of gamma-alpha subunit complex from Burkholderia cepacia FAD glucose dehydrogenase

Summary for 6A2U

• Entry DOI: 10.2210/pdb6a2u/pdb
• Descriptor: Twin-arginine translocation pathway signal, Glucose dehydrogenase, FLAVIN-ADENINE DINUCLEOTIDE, ... (5 entities in total)
• Functional Keywords: glucose dehydrogenase, fad, burkholderia cepacia, oxidoreductase, signaling protein-oxidoreductase complex, signaling protein/oxidoreductase
• Biological source: Burkholderia cepacia (Pseudomonas cepacia); More
• Total number of polymer chains: 4
• Total formula weight: 149741.94

Authors

Yoshida, H.,Kojima, K.,Yoshimatsu, K.,Shiota, M.,Yamazaki, T.,Ferri, S.,Tsugawa, W.,Kamitori, S.,Sode, K. (deposition date: 2018-06-13, release date: 2019-06-19, Last modification date: 2024-10-23)

Primary citation

Yoshida, H.,Kojima, K.,Shiota, M.,Yoshimatsu, K.,Yamazaki, T.,Ferri, S.,Tsugawa, W.,Kamitori, S.,Sode, K.
X-ray structure of the direct electron transfer-type FAD glucose dehydrogenase catalytic subunit complexed with a hitchhiker protein.
Acta Crystallogr D Struct Biol, 75:841-851, 2019

PubMed Abstract: The bacterial flavin adenine dinucleotide (FAD)-dependent glucose dehydrogenase complex derived from Burkholderia cepacia (BcGDH) is a representative molecule of direct electron transfer-type FAD-dependent dehydrogenase complexes. In this study, the X-ray structure of BcGDHγα, the catalytic subunit (α-subunit) of BcGDH complexed with a hitchhiker protein (γ-subunit), was determined. The most prominent feature of this enzyme is the presence of the 3Fe-4S cluster, which is located at the surface of the catalytic subunit and functions in intramolecular and intermolecular electron transfer from FAD to the electron-transfer subunit. The structure of the complex revealed that these two molecules are connected through disulfide bonds and hydrophobic interactions, and that the formation of disulfide bonds is required to stabilize the catalytic subunit. The structure of the complex revealed the putative position of the electron-transfer subunit. A comparison of the structures of BcGDHγα and membrane-bound fumarate reductases suggested that the whole BcGDH complex, which also includes the membrane-bound β-subunit containing three heme c moieties, may form a similar overall structure to fumarate reductases, thus accomplishing effective electron transfer.

PubMed: 31478907
DOI: 10.1107/S2059798319010878

Experimental method

X-RAY DIFFRACTION (2.6 Å)