Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.23 kDa 
• Atom Count: 915 
• Residue Count: 118 
• Unique protein chains: 1

1TMY

CHEY FROM THERMOTOGA MARITIMA (APO-I)

• DOI: 10.2210/pdb1TMY/pdb

• Classification: CHEMOTAXIS
• Organism(s): Thermotoga maritima
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-05-16 Released: 1997-11-19 
• Deposition Author(s): Usher, K.C., De La Cruz, A., Dahlquist, F.W., Remington, S.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.186 

Literature

Crystal structures of CheY from Thermotoga maritima do not support conventional explanations for the structural basis of enhanced thermostability.

Usher, K.C., de la Cruz, A.F., Dahlquist, F.W., Swanson, R.V., Simon, M.I., Remington, S.J.

(1998) Protein Sci 7: 403-412

• PubMed: 9521117 
• DOI: 10.1002/pro.5560070221
• Primary Citation of Related Structures:  
  3TMY, 4TMY, 2TMY, 1TMY


• PubMed Abstract: 
  

The crystal structure of CheY protein from Thermotoga maritima has been determined in four crystal forms with and without Mg++ bound, at up to 1.9 A resolution. Structural comparisons with CheY from Escherichia coli shows substantial similarity in their folds, with some concerted changes propagating away from the active site that suggest how phosphorylated CheY, a signal transduction protein in bacterial chemotaxis, is recognized by its targets. A highly conserved segment of the protein (the "y-turn loop," residues 55-61), previously suggested to be a rigid recognition determinant, is for the first time seen in two alternative conformations in the different crystal structures. Although CheY from Thermotoga has much higher thermal stability than its mesophilic counterparts, comparison of structural features previously proposed to enhance thermostability such as hydrogen bonds, ion pairs, compactness, and hydrophobic surface burial would not suggest it to be so.

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Related Citations: 

• Magnesium Binding to the Bacterial Chemotaxis Protein Chey Results in Large Conformational Changes Involving its Functional Surface
  Bellsolell, L., Prieto, J., Serrano, L., Coll, M.
  (1994) J Mol Biol 238: 489

• Erratum. Magnesium Binding to the Bacterial Chemotaxis Protein Chey Results in Large Conformational Changes Involving its Functional Surface
  Bellsolell, L., Prieto, J., Serrano, L., Coll, M.
  (1994) J Mol Biol 242: 103

• Crystal Structure of Escherichia Coli Chey Refined at 1.7-A Resolution
  Volz, K., Matsumura, P.
  (1991) J Biol Chem 266: 15511

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Organizational Affiliation: 

Institute of Molecular Biology and Department of Chemistry, University of Oregon, Eugene 97403, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHEY PROTEIN	A	120	Thermotoga maritima	Mutation(s): 0  Gene Names: cheY
Find proteins for Q56312 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)) Explore Q56312  Go to UniProtKB:  Q56312

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.186 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.04	α = 90
b = 53.95	β = 95.56
c = 34.16	γ = 90

Software Package:

Software Name	Purpose
RSS	model building
TNT	refinement
R-AXIS	data reduction
OSCILL	data reduction
R-AXIS	data scaling
SCALE	data scaling
RSS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-05-16 
• Released Date: 1997-11-19 
Deposition Author(s): Usher, K.C., De La Cruz, A., Dahlquist, F.W., Remington, S.J.

Revision History 

• Version 1.0: 1997-11-19
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance