2QDL

Crystal structure of scaffolding protein TtCheW from Thermoanaerobacter tengcongensis

• PDB DOI: https://doi.org/10.2210/pdb2QDL/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Caldanaerobacter subterraneus subsp. tengcongensis MB4
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-06-21 Released: 2007-09-04 
• Deposition Author(s): Yao, W., Shi, L., Liang, D.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.233 
• R-Value Work: 0.194 
• R-Value Observed: 0.196 

Starting Model: experimental

Literature

Crystal structure of scaffolding protein CheW from thermoanaerobacter tengcongensis.

Yao, W., Shi, L., Liang, D.C.

(2007) Biochem Biophys Res Commun 361: 1027-1032

• PubMed: 17681283 
• DOI: https://doi.org/10.1016/j.bbrc.2007.07.130
• Primary Citation of Related Structures:  
  2QDL


• PubMed Abstract: 
  

  The crystal structure of the scaffolding protein CheW from Thermoanaerobacter tengcongensis (TtCheW) is reported with a resolution at 2.2A using molecular replacement. Based on the crystal structure TmCheA P4-P5-TmCheW from Thermotoga maritime reported by others, we modeled the TmCheA P4-P5-TtCheW complex and predicted that TtCheW is involved in a hydrophobic interaction with CheA, similar to that for TmCheW. We also found that the conserved motif "NxxGxIxP" from CheW plays an important role in CheA binding. The coincidence of the reported mutation sites related to CheW-MCP binding, and the predicted protein interaction region within the TtCheW molecule, suggest that CheW-MCP binding sites lie in the groove-shaped area between TtCheW and the CheA P4 domain within the assembled model.

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Organizational Affiliation: 

National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, PR China.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 37.39 kDa 
• Atom Count: 2,466 
• Modelled Residue Count: 300 
• Deposited Residue Count: 330 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chemotaxis signal transduction protein	A, B	165	Caldanaerobacter subterraneus subsp. tengcongensis MB4	Mutation(s): 0
UniProt
Find proteins for Q8RBV8 (Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4)) Explore Q8RBV8  Go to UniProtKB:  Q8RBV8

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	C [auth A], D [auth A], E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.233 
• R-Value Work: 0.194 
• R-Value Observed: 0.196 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.214	α = 90
b = 62.235	β = 115.37
c = 55.142	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
CrystalClear	data collection
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-04 
Deposition Author(s): Yao, W., Shi, L., Liang, D.C.

Revision History  

• Version 1.0: 2007-09-04
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.2: 2023-08-30
  Changes: Data collection, Database references, Refinement description