Crystal structure of the central axis DF complex of the prokaryotic V-ATPase

V-ATPases function as ATP-dependent ion pumps in various membrane systems of living organisms. ATP hydrolysis causes rotation of the central rotor complex, which is composed of the central axis D subunit and a membrane c ring that are connected by F and d subunits. Here we determined the crystal str...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2011-12, Vol.108 (50), p.19955-19960
Hauptverfasser: Saijo, Shinya, Arai, Satoshi, Hossain, K. M. Mozaffor, Yamato, Ichiro, Suzuki, Kano, Kakinuma, Yoshimi, Ishizuka-Katsura, Yoshiko, Ohsawa, Noboru, Terada, Takaho, Shirouzu, Mikako, Yokoyama, Shigeyuki, Iwata, So, Murata, Takeshi
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container_title Proceedings of the National Academy of Sciences - PNAS
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creator Saijo, Shinya
Arai, Satoshi
Hossain, K. M. Mozaffor
Yamato, Ichiro
Suzuki, Kano
Kakinuma, Yoshimi
Ishizuka-Katsura, Yoshiko
Ohsawa, Noboru
Terada, Takaho
Shirouzu, Mikako
Yokoyama, Shigeyuki
Iwata, So
Murata, Takeshi
description V-ATPases function as ATP-dependent ion pumps in various membrane systems of living organisms. ATP hydrolysis causes rotation of the central rotor complex, which is composed of the central axis D subunit and a membrane c ring that are connected by F and d subunits. Here we determined the crystal structure of the DF complex of the prokaryotic V-ATPase of Enterococcus hirae at 2.0-Å resolution. The structure of the D subunit comprised a long left-handed coiled coil with a unique short β-hairpin region that is effective in stimulating the ATPase activity of V1-ATPase by twofold. The F subunit is bound to the middle portion of the D subunit. The C-terminal helix of the F subunit, which was believed to function as a regulatory region by extending into the catalytic A3B3 complex, contributes to tight binding to the D subunit by forming a three-helix bundle. Both D and F subunits are necessary to bind the d subunit that links to the c ring. From these findings, we modeled the entire rotor complex (DFdc ring) of V-ATPase.
doi_str_mv 10.1073/pnas.1108810108
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From these findings, we modeled the entire rotor complex (DFdc ring) of V-ATPase.</abstract><cop>United States</cop><pub>National Academy of Sciences</pub><pmid>22114184</pmid><doi>10.1073/pnas.1108810108</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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subjects Adenosine triphosphatase
Adenosine triphosphatases
adenosine triphosphate
adenosinetriphosphatase
Amino Acid Sequence
Archaea
ATP
Binding sites
Biochemistry
Biological Sciences
Cell membranes
Crystal structure
Crystallography, X-Ray
Enterococcus
Enterococcus - enzymology
Enterococcus hirae
hydrolysis
Membranes
Models, Molecular
Molecular Sequence Data
Physiology
Prokaryotes
Prokaryotic Cells - enzymology
Protein Structure, Secondary
Protein Subunits - chemistry
Protein Subunits - metabolism
Proteins
Rotation
Sequence Alignment
Static Electricity
Structural Homology, Protein
Thermus
transporters
Vacuolar Proton-Translocating ATPases - chemistry
Vacuolar Proton-Translocating ATPases - metabolism
title Crystal structure of the central axis DF complex of the prokaryotic V-ATPase
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