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CATH Classification

Domain Context

CATH Clusters

Superfamily 5' to 3' exonuclease, C-terminal subdomain
Functional Family DNA-directed RNA polymerase subunit alpha

Enzyme Information

2.7.7.6
DNA-directed RNA polymerase.
based on mapping to UniProt Q664U6
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1).
-!- Catalyzes DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. -!- Can initiate a chain de novo. -!- In eukaryotes three forms of the enzyme have been distinguished on the basis of sensitivity of alpha-amanitin, and the type of RNA synthesized. -!- See also EC 2.7.7.19 and EC 2.7.7.48.

UniProtKB Entries (2)

Q664U6
RPOA_YERPS
Yersinia pseudotuberculosis IP 32953
DNA-directed RNA polymerase subunit alpha
P0AFF6
NUSA_ECOLI
Escherichia coli K-12
Transcription termination/antitermination protein NusA

PDB Structure

PDB 2JZB
External Links
Method SOLUTION NMR
Organism Escherichia
Primary Citation
structural basis of transcription elongation control: the NusA-aCTD complex
Prasch, S., Schweimer, K., Roesch, P.
To be Published
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