Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

NLM Logo

RNA Polymerase III MeSH Descriptor Data 2025


MeSH Heading
RNA Polymerase III
Tree Number(s)
D08.811.913.696.445.735.270.775
Unique ID
D012320
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D012320
Scope Note
A DNA-dependent RNA polymerase present in bacterial, plant, and animal cells. It functions in the nucleoplasmic structure where it transcribes DNA into RNA. It has specific requirements for cations and salt and has shown an intermediate sensitivity to alpha-amanitin in comparison to RNA polymerase I and II.
Entry Term(s)
DNA-Dependent RNA Polymerase III
RNA Polymerase C
Registry Numbers
EC 2.7.7.6
Previous Indexing
RNA Nucleotidyltransferases (1968-1972)
RNA Polymerases (1973-1976)
Public MeSH Note
91; was see under RNA POLYMERASES 1977-90
History Note
91(77); was see under RNA POLYMERASES 1977-90
Date Established
1991/01/01
Date of Entry
1976/04/19
Revision Date
2016/06/29
RNA Polymerase III Preferred
page delivered in 0.124s