Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 117347.48 
• Atom Count: 7314 
• Residue Count: 1034 
• Unique protein chains: 2

1ARO

T7 RNA POLYMERASE COMPLEXED WITH T7 LYSOZYME

• DOI: 10.2210/pdb1ARO/pdb

• Classification: COMPLEX (POLYMERASE/HYDROLASE)
• Organism(s): Enterobacteria phage T7
• Expression System: Escherichia coli BL21
• Mutation(s): 2 


• Deposited: 1997-08-08 Released: 1998-10-21 
• Deposition Author(s): Steitz, T., Jeruzalmi, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.262 

Literature

Structure of T7 RNA polymerase complexed to the transcriptional inhibitor T7 lysozyme.

Jeruzalmi, D., Steitz, T.A.

(1998) EMBO J. 17: 4101-4113

• PubMed: 9670025 
• DOI: 10.1093/emboj/17.14.4101


• PubMed Abstract: 
  

The T7 RNA polymerase-T7 lysozyme complex regulates phage gene expression during infection of Escherichia coli. The 2.8 A crystal structure of the complex reveals that lysozyme binds at a site remote from the polymerase active site, suggesting an indirect mechanism of inhibition. Comparison of the T7 RNA polymerase structure with that of the homologous pol I family of DNA polymerases reveals identities in the catalytic site but also differences specific to RNA polymerase function. The structure of T7 RNA polymerase presented here differs significantly from a previously published structure. Sequence similarities between phage RNA polymerases and those from mitochondria and chloroplasts, when interpreted in the context of our revised model of T7 RNA polymerase, suggest a conserved fold.

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Organizational Affiliation: 

Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, New Haven, CT 06520-8114, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
T7 RNA POLYMERASE	P	883	Enterobacteria phage T7	Mutation(s): 2
Find proteins for P00573 (Enterobacteria phage T7) Go to UniProtKB:  P00573

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
T7 LYSOZYME	L	151	Enterobacteria phage T7	Mutation(s): 0  EC: 3.5.1.28
Find proteins for P00806 (Enterobacteria phage T7) Go to UniProtKB:  P00806

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HG	L, P	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.262 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 273.385	α = 90.00
b = 95.612	β = 101.40
c = 63.582	γ = 90.00

Software Package:

Software Name	Purpose
DEMON-ANGEL	phasing
CNS	phasing
DEMON-ANGEL	model building
X-PLOR	refinement
X-PLOR	phasing
CNS	refinement
X-PLOR	model building
SCALEPACK	data scaling
DENZO	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-08-08 
• Released Date: 1998-10-21 
• Deposition Author(s): Steitz, T., Jeruzalmi, D.

Revision History 

• Version 1.0: 1998-10-21
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance