1A3A

CRYSTAL STRUCTURE OF IIA MANNITOL FROM ESCHERICHIA COLI

• PDB DOI:  https://doi.org/10.2210/pdb1A3A/pdb

• Classification: PHOSPHOTRANSFERASE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-01-19 Released: 1998-08-12 
• Deposition Author(s): Van Montfort, R.L.M., Pijning, T., Kalk, K.H., Hangyi, I., Kouwijzer, M.L.C.E., Robillard, G.T., Dijkstra, B.W.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.242 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

The structure of the Escherichia coli phosphotransferase IIAmannitol reveals a novel fold with two conformations of the active site.

van Montfort, R.L., Pijning, T., Kalk, K.H., Hangyi, I., Kouwijzer, M.L., Robillard, G.T., Dijkstra, B.W.

(1998) Structure 6: 377-388

• PubMed: 9551558 
• DOI: https://doi.org/10.1016/s0969-2126(98)00039-2
• Primary Citation of Related Structures:  
  1A3A


• PubMed Abstract: 
  

  The bacterial phosphoenolpyruvate-dependent phosphotransferase system (PTS) catalyses the cellular uptake and subsequent phosphorylation of carbohydrates. Moreover, the PTS plays a crucial role in the global regulation of various metabolic pathways. The PTS consists of two general proteins, enzyme I and the histidine-containing protein (HPr), and the carbohydrate-specific enzyme II (EII). EIIs are usually composed of two cytoplasmic domains, IIA and IIB, and a transmembrane domain, IIC. The IIA domains catalyse the transfer of a phosphoryl group from HPr to IIB, which phosphorylates the transported carbohydrate. Knowledge of the structures of the IIA proteins may provide insight into the mechanisms by which the PTS couples phosphorylation reactions with carbohydrate specificity.

---

Organizational Affiliation: 

Laboratory of Biophysical Chemistry, BIOSON Research Institute, University of Groningen, Nijenborgh, The Netherlands.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 65.39 kDa 
• Atom Count: 5,041 
• Modelled Residue Count: 576 
• Deposited Residue Count: 592 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MANNITOL-SPECIFIC EII	A, B, C, D	148	Escherichia coli K-12	Mutation(s): 0  Gene Names: mtlA, b3599, JW3573 EC: 2.7.1.69 (PDB Primary Data), 2.7.1.197 (UniProt)
UniProt
Find proteins for P00550 (Escherichia coli (strain K12)) Explore P00550  Go to UniProtKB:  P00550

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.242 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.57	α = 90
b = 66.01	β = 99.76
c = 73.86	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
REFMAC	refinement
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-08-12 
Deposition Author(s): Van Montfort, R.L.M., Pijning, T., Kalk, K.H., Hangyi, I., Kouwijzer, M.L.C.E., Robillard, G.T., Dijkstra, B.W.

Revision History  

• Version 1.0: 1998-08-12
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance