1A0B

HISTIDINE-CONTAINING PHOSPHOTRANSFER DOMAIN OF ARCB FROM ESCHERICHIA COLI

• PDB DOI: https://doi.org/10.2210/pdb1A0B/pdb

• Classification: HISTIDINE KINASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-11-27 Released: 1998-03-18 
• Deposition Author(s): Kato, M., Mizuno, T., Shimizu, T., Hakoshima, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.06 Å
• R-Value Free: 0.271 
• R-Value Work: 0.181 
• R-Value Observed: 0.181 

Literature

Insights into multistep phosphorelay from the crystal structure of the C-terminal HPt domain of ArcB.

Kato, M., Mizuno, T., Shimizu, T., Hakoshima, T.

(1997) Cell 88: 717-723

• PubMed: 9054511 
• DOI: https://doi.org/10.1016/s0092-8674(00)81914-5
• Primary Citation of Related Structures:  
  1A0B


• PubMed Abstract: 
  

  The histidine-containing phosphotransfer (HPt) domain is a novel protein module with an active histidine residue that mediates phosphotransfer reactions in the two-component signaling systems. A multistep phosphorelay involving the HPt domain has been suggested for these signaling pathways. The crystal structure of the HPt domain of the anaerobic sensor kinase ArcB has been determined at 2.06 A resolution. The domain consists of six alpha helices containing a four-helix bundle-folding. The pattern of sequence similarity of the HPt domains of ArcB and components in other signaling systems can be interpreted in light of the three-dimensional structure and supports the conclusion that the HPt domains have a common structural motif both in prokaryotes and eukaryotes.

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Organizational Affiliation: 

Department of Molecular Biology, Nara Institute of Science and Technology, Ikoma, Japan.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.08 kDa 
• Atom Count: 1,041 
• Modelled Residue Count: 117 
• Deposited Residue Count: 125 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AEROBIC RESPIRATION CONTROL SENSOR PROTEIN ARCB	A	125	Escherichia coli	Mutation(s): 0  EC: 2.7.3 (PDB Primary Data), 2.7.13.3 (UniProt)
UniProt
Find proteins for P0AEC3 (Escherichia coli (strain K12)) Explore P0AEC3  Go to UniProtKB:  P0AEC3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.06 Å
• R-Value Free: 0.271 
• R-Value Work: 0.181 
• R-Value Observed: 0.181 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 30.56	α = 90
b = 34.93	β = 90
c = 110.78	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
XTALVIEW	refinement
X-PLOR	refinement
PROCESS	data reduction
PROCESS	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-03-18 
Deposition Author(s): Kato, M., Mizuno, T., Shimizu, T., Hakoshima, T.

Revision History  

• Version 1.0: 1998-03-18
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations