Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 56.45 kDa 
• Atom Count: 3854 
• Modelled Residue Count: 495 
• Deposited Residue Count: 516 
• Unique protein chains: 1

1ZYM

AMINO TERMINAL DOMAIN OF ENZYME I FROM ESCHERICHIA COLI

• PDB DOI: 10.2210/pdb1ZYM/pdb

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


• Deposited: 1996-05-21 Released: 1996-12-07 
• Deposition Author(s): Liao, D.-I., Davies, D.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.306 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Literature

The first step in sugar transport: crystal structure of the amino terminal domain of enzyme I of the E. coli PEP: sugar phosphotransferase system and a model of the phosphotransfer complex with HPr.

Liao, D.I., Silverton, E., Seok, Y.J., Lee, B.R., Peterkofsky, A., Davies, D.R.

(1996) Structure 4: 861-872

• PubMed: 8805571 
• DOI: 10.1016/s0969-2126(96)00092-5
• Primary Citation of Related Structures:  
  1ZYM


• PubMed Abstract: 
  

The bacterial phosphoenolpyruvate (PEP): sugar phosphotransferase system (PTS) transports exogenous hexose sugars through the membrane and tightly couples transport with phosphoryl transfer from PEP to the sugar via several phosphoprotein intermediates. The phosphate group is first transferred to enzyme I, second to the histidine-containing phosphocarrier protein HPr, and then to one of a number of sugar-specific enzymes II. The structures of several HPrs and enzymes IIA are known. Here we report the structure of the N-terminal half of enzyme I from Escherichia coli (EIN).

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Organizational Affiliation: 

Laboratory of Molecular Biology, NIDDK, National Institutes of Health, Bethesda, MD 20892, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ENZYME I	A, B	258	Escherichia coli	Mutation(s): 0  EC: 2.7.3.9
UniProt
Find proteins for P08839 (Escherichia coli (strain K12)) Explore P08839  Go to UniProtKB:  P08839

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.306 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.42	α = 90
b = 75.78	β = 90
c = 170.28	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-05-21 
• Released Date: 1996-12-07 
Deposition Author(s): Liao, D.-I., Davies, D.R.

Revision History  

• Version 1.0: 1996-12-07
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance