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GO:0000418 DNA-directed RNA polymerase IV complex

Term Information

ID GO:0000418
Name DNA-directed RNA polymerase IV complex
Ontology Cellular Component
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.
PMID:15692015 PMID:15766525 PMID:16140984 PMID:19110459
Secondary IDs GO:0000420
GONUTS GO:0000418 Wiki Page

Synonyms

Synonyms are alternative words or phrases closely related in meaning to the term name, with indication of the relationship between the name and synonym given by the synonym scope. Click on the icon for more details.
Type Synonym
exact DNA-directed RNA polymerase IVa complex

Taxon Constraints

The use of this term should conform to the following taxon constraints:
Taxon Rule Ancestor GO ID Ancestor GO Term Name Relationship Taxon ID Taxon Reference(s)
GOTAX:0000057 GO:0005623 cell only_in_taxon 131567 cellular organisms
GOTAX:0000059 GO:0005634 nucleus only_in_taxon 2759 Eukaryota
More information on taxon constraints in GO is available here

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Child Terms

This table lists all terms that are direct descendants (child terms) of GO:0000418:
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Protein Annotation

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Co-occurring Terms

These tables show the number of times the term listed in the table has been co-annotated with GO:0000418. The terms are listed in descending order of number of times the term has been co-annotated.
The table on the left is calculated using both electronic and manual-evidenced annotations, while the table on the right is calculated using only manual-evidenced annotations.
Co-occurrence statistics for GO:0000418 based on the entire annotation set Co-occurrence statistics for GO:0000418 based on non-IEA annotations only

Change Log

All changes

Timestamp Action Category Detail
2011-08-21 Added SYNONYM DNA-directed RNA polymerase IVa complex
2011-08-21 Deleted DEFINITION RNA polymerase IV is a multisubunit RNA polymerase complex found in the nucleus of plants. In addition to RNA polymerases I, II, and III, the essential RNA polymerases present in all eukaryotes, plants have two additional nuclear RNA polymerases, Pol IV and Pol V, that play nonredundant roles in siRNA-directed DNA methylation and gene silencing. Pol IV is required for siRNA production and Pol V is required for generating noncoding transcripts at target loci. 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.
2011-08-21 Added 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.
2011-08-21 Added SECONDARY GO:0000420 (DNA-directed RNA polymerase IVa complex)
2009-05-22 Deleted 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2009-05-22 Added DEFINITION RNA polymerase IV is a multisubunit RNA polymerase complex found in the nucleus of plants. In addition to RNA polymerases I, II, and III, the essential RNA polymerases present in all eukaryotes, plants have two additional nuclear RNA polymerases, Pol IV and Pol V, that play nonredundant roles in siRNA-directed DNA methylation and gene silencing. Pol IV is required for siRNA production and Pol V is required for generating noncoding transcripts at target loci. 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.
2008-05-13 Added 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2008-05-12 Deleted 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2008-04-01 Updated RELATION is a GO:0044451 (nucleoplasm part)
2008-04-01 Updated RELATION is a GO:0055029 (nuclear DNA-directed RNA polymerase complex)
2006-11-09 Added TERM DNA-directed RNA polymerase IV complex
2006-11-09 Added 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.

Term

Timestamp Action Category Detail
2006-11-09 Added TERM DNA-directed RNA polymerase IV complex

Definition/synonyms

Timestamp Action Category Detail
2011-08-21 Added SYNONYM DNA-directed RNA polymerase IVa complex
2011-08-21 Deleted DEFINITION RNA polymerase IV is a multisubunit RNA polymerase complex found in the nucleus of plants. In addition to RNA polymerases I, II, and III, the essential RNA polymerases present in all eukaryotes, plants have two additional nuclear RNA polymerases, Pol IV and Pol V, that play nonredundant roles in siRNA-directed DNA methylation and gene silencing. Pol IV is required for siRNA production and Pol V is required for generating noncoding transcripts at target loci. 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.
2011-08-21 Added 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.
2009-05-22 Deleted 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2009-05-22 Added DEFINITION RNA polymerase IV is a multisubunit RNA polymerase complex found in the nucleus of plants. In addition to RNA polymerases I, II, and III, the essential RNA polymerases present in all eukaryotes, plants have two additional nuclear RNA polymerases, Pol IV and Pol V, that play nonredundant roles in siRNA-directed DNA methylation and gene silencing. Pol IV is required for siRNA production and Pol V is required for generating noncoding transcripts at target loci. 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.
2008-05-13 Added 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2008-05-12 Deleted 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.
2006-11-09 Added 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. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The IVa and IVb complexes contain different forms of the largest subunit. The remainder of the complex is composed of smaller subunits.

Relationships

Timestamp Action Category Detail
2008-04-01 Updated RELATION is a GO:0044451 (nucleoplasm part)
2008-04-01 Updated RELATION is a GO:0055029 (nuclear DNA-directed RNA polymerase complex)

Other

Timestamp Action Category Detail
2011-08-21 Added SECONDARY GO:0000420 (DNA-directed RNA polymerase IVa complex)
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