4RNP

BACTERIOPHAGE T7 RNA POLYMERASE, HIGH SALT CRYSTAL FORM, LOW TEMPERATURE DATA, ALPHA-CARBONS ONLY

• PDB DOI: https://doi.org/10.2210/pdb4RNP/pdb
• Entry: 4RNP supersedes: 3RNP

• Classification: NUCLEOTIDYLTRANSFERASE
• Organism(s): Escherichia phage T7
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-09-11 Released: 1997-12-03 
• Deposition Author(s): Liu, Z.J., Sousa, R., Rose, J.P., Wang, B.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å

Literature

Crystal structure of bacteriophage T7 RNA polymerase at 3.3 A resolution.

Sousa, R., Chung, Y.J., Rose, J.P., Wang, B.C.

(1993) Nature 364: 593-599

• PubMed: 7688864 
• DOI: https://doi.org/10.1038/364593a0
• Primary Citation of Related Structures:  
  4RNP


• PubMed Abstract: 
  

  The crystal structure of T7 RNA polymerase reveals a molecule organized around a cleft that can accommodate a double-stranded DNA template. A portion (approximately 45%) of the molecule displays extensive structural homology to the polymerase domain of Klenow fragment and more limited homology to the human immunodeficiency virus HIV-1 reverse transcriptase. A comparison of the structures and sequences of these polymerases identifies structural elements that may be responsible for discriminating between ribonucleotide and deoxyribonucleotide substrates, and RNA and DNA templates. The relative locations of the catalytic site and a specific promoter recognition residue allow the orientation of the polymerase on the template to be defined.

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Organizational Affiliation: 

Department of Biological Sciences, University of Pittsburgh, Pennsylvania 15260.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Biological Assembly 3  

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

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 296.95 kDa 
• Atom Count: 2,340 
• Modelled Residue Count: 2,340 
• Deposited Residue Count: 2,649 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RNA POLYMERASE	A, B, C	883	Escherichia phage T7	Mutation(s): 0  Gene Names: T7 RNAP EC: 2.7.7.6
UniProt
Find proteins for P00573 (Escherichia phage T7) Explore P00573  Go to UniProtKB:  P00573

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.267	α = 90
b = 137.681	β = 96.36
c = 122.566	γ = 90

Software Package:

Software Name	Purpose
ISIR	phasing
PHASES	phasing
X-GEN	data reduction
X-GEN	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-12-03 
Deposition Author(s): Liu, Z.J., Sousa, R., Rose, J.P., Wang, B.C.
• This entry supersedes: 3RNP

Revision History  

• Version 1.0: 1997-12-03
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-28
  Changes: Data collection, Database references