RNA polymerase IV complex

Term ID

GO:0000418

Synonyms

• DNA-directed RNA polymerase IV complex
• DNA-directed RNA polymerase IVa complex

Definition

RNA polymerase IV is a multisubunit RNA polymerase complex found in the nucleus of plants and involved in accumulation of siRNAs and in DNA methylation-dependent silencing of endogenous repeated sequences. Pol IV is composed of subunits that are paralogous or identical to the 12 subunits of Pol II. The largest and second-largest subunits of Pol IV are the catalytic subunits and share similarity with the corresponding subunits of other eukaryotic and bacterial multisubunit RNA polymerases. The second largest subunit is also found in RNA polymerase V, while the largest subunit is found only in RNAP IV complex. (4)

References

Ontology

GO: Cellular Component    QuickGO    AmiGO