4RNP image
Deposition Date 1997-09-11
Release Date 1997-12-03
Last Version Date 2024-02-28
Entry Detail
PDB ID:
4RNP
Title:
BACTERIOPHAGE T7 RNA POLYMERASE, HIGH SALT CRYSTAL FORM, LOW TEMPERATURE DATA, ALPHA-CARBONS ONLY
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.00 Å
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:RNA POLYMERASE
Gene (Uniprot):1
Chain IDs:A, B, C
Chain Length:883
Number of Molecules:3
Biological Source:Enterobacteria phage T7
Ligand Molecules
Primary Citation
Crystal structure of bacteriophage T7 RNA polymerase at 3.3 A resolution.
Nature 364 593 599 (1993)
PMID: 7688864 DOI: 10.1038/364593a0

Abstact

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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Primary Citation of related structures