Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 85910.95 
• Atom Count: 5618 
• Residue Count: 785 
• Unique protein chains: 1

3BZC

Crystal Structure of the Tex protein from Pseudomonas aeruginosa, crystal form I

• DOI: 10.2210/pdb3BZC/pdb

• Classification: RNA BINDING PROTEIN
• Organism(s): Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
• Expression System: Escherichia coli


• Deposited: 2008-01-17 Released: 2008-04-08 
• Deposition Author(s): Johnson, S.J., Close, D., Hill, C.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.27 Å
• R-Value Free: 0.274 
• R-Value Work: 0.240 

Literature

Crystal structure and RNA binding of the Tex protein from Pseudomonas aeruginosa.

Johnson, S.J., Close, D., Robinson, H., Vallet-Gely, I., Dove, S.L., Hill, C.P.

(2008) J.Mol.Biol. 377: 1460-1473

• PubMed: 18321528 
• DOI: 10.1016/j.jmb.2008.01.096
• Primary Citation of Related Structures:  
  3BZK


• PubMed Abstract: 
  

Tex is a highly conserved bacterial protein that likely functions in a variety of transcriptional processes. Here, we describe two crystal structures of the 86-kDa Tex protein from Pseudomonas aeruginosa at 2.3 and 2.5 A resolution, respectively. These structures reveal a relatively flat and elongated protein, with several potential nucleic acid binding motifs clustered at one end, including an S1 domain near the C-terminus that displays considerable structural flexibility. Tex binds nucleic acids, with a preference for single-stranded RNA, and the Tex S1 domain is required for this binding activity. Point mutants further demonstrate that the primary nucleic acid binding site corresponds to a surface of the S1 domain. Sequence alignment and modeling indicate that the eukaryotic Spt6 transcription factor adopts a similar core structure. Structural analysis further suggests that the RNA polymerase and nucleosome interacting regions of Spt6 flank opposite sides of the Tex-like scaffold. Therefore, the Tex structure may represent a conserved scaffold that binds single-stranded RNA to regulate transcription in both eukaryotic and prokaryotic organisms.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, Utah State University, Logan, UT 84322-0300, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Tex	A	785	Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)	Mutation(s): 0
Find proteins for Q9HTY8 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Go to UniProtKB:  Q9HTY8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.27 Å
• R-Value Free: 0.274 
• R-Value Work: 0.240 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 57.165	α = 90.00
b = 131.849	β = 90.00
c = 144.017	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-01-17 
• Released Date: 2008-04-08 
• Deposition Author(s): Johnson, S.J., Close, D., Hill, C.P.

Revision History 

• Version 1.0: 2008-04-08
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance
• Version 1.2: 2017-10-25
  Type: Refinement description