CATH Domain 1zyrA02

CATH Classification

Level	CATH Code	Description
	2	Mainly Beta
	2.170	Beta Complex
	2.170.120	RNA Polymerase Alpha Subunit; Chain A, domain 2
	2.170.120.12	DNA-directed RNA polymerase, insert domain

Domain Context

CATH Clusters

Superfamily	DNA-directed RNA polymerase, insert domain
Functional Family	DNA-directed RNA polymerase subunit alpha

Enzyme Information

2.7.7.6

DNA-directed RNA polymerase.

based on mapping to UniProt Q5SHR6

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 (1)

Q5SHR6

RPOA_THET8

Thermus thermophilus HB8

DNA-directed RNA polymerase subunit alpha

PDB Structure

PDB	1ZYR
External Links	PDBSum Proteopedia
Method	X-RAY DIFFRACTION
Organism
Primary Citation	Inhibition of bacterial RNA polymerase by streptolydigin: stabilization of a straight-bridge-helix active-center conformation. Tuske, S., Sarafianos, S.G., Wang, X., Hudson, B., Sineva, E., Mukhopadhyay, J., Birktoft, J.J., Leroy, O., Ismail, S., Clark, A.D., Dharia, C., Napoli, A., Laptenko, O., Lee, J., Borukhov, S., Ebright, R.H., Arnold, E. Cell(Cambridge,Mass.)