3S0H | pdb_00003s0h

The crystal structure of the periplasmic domain of Helicobacter pylori MotB (residues 90-256).

PDB DOI: https://doi.org/10.2210/pdb3S0H/pdb

Classification: MOTOR PROTEIN
Organism(s): Helicobacter pylori
Expression System: Escherichia coli BL21
Mutation(s): No

Deposited: 2011-05-13 Released: 2012-03-14
Deposition Author(s): Roujeinikova, A.R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.10 Å
R-Value Free:
0.236 (Depositor)
R-Value Work:
0.181 (Depositor)
R-Value Observed:
0.184 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Role of the MotB linker in the assembly and activation of the bacterial flagellar motor.

O'Neill, J., Xie, M., Hijnen, M., Roujeinikova, A.

(2011) Acta Crystallogr D Biol Crystallogr 67: 1009-1016

PubMed: 22120737 Search on PubMed
DOI: https://doi.org/10.1107/S0907444911041102
Primary Citation Related Structures:
3S02, 3S03, 3S06, 3S0H, 3S0W, 3S0Y

PubMed Abstract:
Bacterial flagella are driven by an ion influx through the peptidoglycan (PG)-tethered MotA/MotB stator. Stator precomplexes assemble in the membrane and remain inactive until they incorporate into the motor, upon which MotA/MotB changes conformation. The nature of this change and the mechanism of inhibition of the PG-binding and ion-conducting activities of the precomplexes are unknown. Here, the structural analysis of a series of N-terminally truncated MotB fragments is presented, the mechanism of inhibition by the linker is identified and the structural basis for the formation of the PG-binding-competent open-channel MotA/MotB conformation via a mechanism that entails linker unfolding and rotational displacement of MotB transmembrane helices is uncovered.

Organizational Affiliation

Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, England.

Macromolecule Content

Total Structure Weight: 79.53 kDa
Atom Count: 6,059
Modeled Residue Count: 650
Deposited Residue Count: 692
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Motility protein B	A, B, C, D	173	Helicobacter pylori	Mutation(s): 0 Gene Names: motB, HP_0816
UniProt
Find proteins for P56427 (Helicobacter pylori (strain ATCC 700392 / 26695)) Explore P56427 Go to UniProtKB: P56427
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P56427
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SO4 Query on SO4 Download:Ideal Coordinates CCD File SDF format, chain M [auth D] SDF format, chain L [auth C] SDF format, chain K [auth C] SDF format, chain J [auth C] SDF format, chain I [auth B] SDF format, chain H [auth B] SDF format, chain G [auth B] SDF format, chain F [auth A] SDF format, chain E [auth A] MOL2 format, chain M [auth D] MOL2 format, chain L [auth C] MOL2 format, chain K [auth C] MOL2 format, chain J [auth C] MOL2 format, chain I [auth B] MOL2 format, chain H [auth B] MOL2 format, chain G [auth B] MOL2 format, chain F [auth A] MOL2 format, chain E [auth A] mmCIF format, chain M [auth D] mmCIF format, chain L [auth C] mmCIF format, chain K [auth C] mmCIF format, chain J [auth C] mmCIF format, chain I [auth B] mmCIF format, chain H [auth B] mmCIF format, chain G [auth B] mmCIF format, chain F [auth A] mmCIF format, chain E [auth A]	E [auth A] F [auth A] G [auth B] H [auth B] I [auth B] E [auth A], F [auth A], G [auth B], H [auth B], I [auth B], J [auth C], K [auth C], L [auth C], M [auth D]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth B] Focus chain H [auth B] Focus chain I [auth B] Focus chain J [auth C] Focus chain K [auth C] Focus chain L [auth C] Focus chain M [auth D] Interactions & Density Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth B] Focus chain H [auth B] Focus chain I [auth B] Focus chain J [auth C] Focus chain K [auth C] Focus chain L [auth C] Focus chain M [auth D]