ISDA

Entry Detail

PDB ID:

5YHF

Keywords:

MEMBRANE PROTEIN

Title:

Crystal structure of SecDF in Super-membrane-facing form

Biological Source:

Source Organism:

Thermus thermophilus

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2017-09-28

Release Date:

2018-02-14

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Protein translocase subunit SecDF
Mutations:N2D
Chain IDs:A
Chain Length:741
Number of Molecules:1
Biological Source:Thermus thermophilus

UniProt ID:Q5SKE6 Pfam ID:PF07549, PF21760, PF22599, PF02355

Ligand Molecules

OLC

PEG

Primary Citation

Remote Coupled Drastic beta-Barrel to beta-Sheet Transition of the Protein Translocation Motor.

Furukawa, A, Nakayama, S, Yoshikaie, K, Tanaka, Y, Tsukazaki, T.Show

Structure 26 485 489.e2 (2018)

PMID: 29398525 DOI: 10.1016/j.str.2018.01.002

Abstact

The membrane protein SecDF, belonging to the RND superfamily, enhances protein translocation at the extracytoplasmic side using a proton gradient. Here, we report the crystal structure of SecDF in a form we named Super-membrane-facing (Super F) form, demonstrating a β-barrel architecture instead of the previously reported β-sheet structure. Through this structural insight and supporting results of an in vivo crosslinking experiment, we propose a remote coupling model in which a structural change of the transmembrane region drives a functional, extracytoplasmic conformational transition.

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