3IQT | pdb_00003iqt

Structure of the HPT domain of Sensor protein barA from Escherichia coli CFT073.

• PDB DOI: https://doi.org/10.2210/pdb3IQT/pdb

• Classification: TRANSFERASE
• Organism(s): Escherichia coli CFT073
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2009-08-20 Released: 2009-09-22 
• Deposition Author(s): Cuff, M.E., Rakowski, E., Kim, Y., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 
  0.181 (Depositor), 0.179 (DCC) 
• R-Value Work: 
  0.141 (Depositor), 0.140 (DCC) 
• R-Value Observed: 
  0.143 (Depositor) 

Literature

Structure of the HPT domain of Sensor protein barA from Escherichia coli CFT073.

Cuff, M.E., Rakowski, E., Kim, Y., Freeman, L., Joachimiak, A.

To be published.

Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 14.19 kDa 
• Atom Count: 1,161 
• Modeled Residue Count: 123 
• Deposited Residue Count: 123 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Signal transduction histidine-protein kinase barA	A	123	Escherichia coli CFT073	Mutation(s): 0  Gene Names: barA, c3349 EC: 2.7.13.3
UniProt
Find proteins for P0AEC6 (Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC)) Explore P0AEC6  Go to UniProtKB:  P0AEC6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BTB	C [auth A]	2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C8 H19 N O5 OWMVSZAMULFTJU-UHFFFAOYSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free:  0.181 (Depositor), 0.179 (DCC) 
• R-Value Work:  0.141 (Depositor), 0.140 (DCC) 
• R-Value Observed: 0.143 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 24.316	α = 90
b = 60.359	β = 108.21
c = 37.156	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MLPHARE	phasing
DM	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
SBC-Collect	data collection
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing
SHELXD	phasing
SHELXE	model building
SOLVE	phasing
RESOLVE	phasing
ARP/wARP	model building
CCP4	phasing
O	model building
Coot	model building

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-09-22 
Deposition Author(s): Cuff, M.E., Rakowski, E., Kim, Y., Freeman, L., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2009-09-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.2: 2017-11-01
  Changes: Refinement description
• Version 1.3: 2024-11-27
  Changes: Data collection, Database references, Derived calculations, Structure summary