1aro
From Proteopedia
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| , resolution 2.8Å | |||||||
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| Ligands: | |||||||
| Gene: | T7 (Enterobacteria phage T7) | ||||||
| Activity: | DNA-directed RNA polymerase, with EC number 2.7.7.6 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
T7 RNA POLYMERASE COMPLEXED WITH T7 LYSOZYME
Overview
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.
About this Structure
1ARO is a Protein complex structure of sequences from Enterobacteria phage t7. Full crystallographic information is available from OCA.
Reference
Structure of T7 RNA polymerase complexed to the transcriptional inhibitor T7 lysozyme., Jeruzalmi D, Steitz TA, EMBO J. 1998 Jul 15;17(14):4101-13. PMID:9670025
Page seeded by OCA on Sun Mar 30 18:46:14 2008
