Protein: DNA-directed RNA polymerase V subunit 1 (DNA-directed RNA polymerase D subunit 1b) (AtNRPD1b) (Nuclear RNA polymerase D 1b) (DNA-directed RNA polymerase E subunit 1) (Nuclear RNA polymerase E 1) (EC 2.7.7.6) (Protein DEFECTIVE IN MERISTEM SILENCING 5) (Protein DEFECTIVE IN RNA-DIRECTED DNA METHYLATION 3) (Protein RNA-DIRECTED DNA METHYLATION DEFECTIVE 1) (RNA polymerase IV subunit 1) (POL IV 1) (Q5D869)
Organism: Arabidopsis thaliana (Mouse-ear cress)
Function: DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Largest and catalytic component of RNA polymerase V involved in RNA-directed DNA methylation-dependent (RdDM) silencing of endogenous repeated sequences, including transposable elements. Also required for full erasure of methylation when the RNA trigger is withdrawn. Seems also involved in the synthesis of short-interfering RNAs (siRNA). Essential component of a self-reinforcing loop coupling de novo DNA methylation to siRNA production. Involved in the maintenance of post-transcriptional RNA silencing.
Subcellular location: Nucleus, nucleolus {ECO:0000269|PubMed:16140984, ECO:0000269|PubMed:16839878, ECO:0000269|PubMed:16839879, ECO:0000269|PubMed:19204117}. Note=Clustered within heterochromatic regions and colocalized with RDR2, DCL3, NRPD4, AGO4, and siRNAs within the nucleolus. Recruited to chromatin via its interaction with SUVH2.
Interaction partners:
- Protein argonaute 4
- DNA-directed RNA polymerases IV and V subunit 2
- DNA-directed RNA polymerases II, IV and V subunit 11
- DNA-directed RNA polymerases IV and V subunit 4
- DNA-directed RNA polymerases II, IV and V subunit 3
- DNA-directed RNA polymerase V subunit 5A
- DNA-directed RNA polymerases IV and V subunit 3B
- DNA-directed RNA polymerases II, IV and V subunit 10
- DNA-directed RNA polymerases II, IV and V subunit 9A
- DNA-directed RNA polymerases II and V subunit 8A
Sequence:
MEEESTSEILDGEIVGITFALASHHEICIQSISESAINHPSQLTNAFLGLPLEFGKCESCGATEPDKCEGHFGYIQLPVPIYHPAHVNELKQMLSLLCLKCLKIKKAKGTSGGLADRLLGVCCEEASQISIKDRASDGASYLELKLPSRSRLQPGCWNFLERYGYRYGSDYTRPLLAREVKEILRRIPEESRKKLTAKGHIPQEGYILEYLPVPPNCLSVPEASDGFSTMSVDPSRIELKDVLKKVIAIKSSRSGETNFESHKAEASEMFRVVDTYLQVRGTAKAARNIDMRYGVSKISDSSSSKAWTEKMRTLFIRKGSGFSSRSVITGDAYRHVNEVGIPIEIAQRITFEERVSVHNRGYLQKLVDDKLCLSYTQGSTTYSLRDGSKGHTELKPGQVVHRRVMDGDVVFINRPPTTHKHSLQALRVYVHEDNTVKINPLMCSPLSADFDGDCVHLFYPQSLSAKAEVMELFSVEKQLLSSHTGQLILQMGSDSLLSLRVMLERVFLDKATAQQLAMYGSLSLPPPALRKSSKSGPAWTVFQILQLAFPERLSCKGDRFLVDGSDLLKFDFGVDAMGSIINEIVTSIFLEKGPKETLGFFDSLQPLLMESLFAEGFSLSLEDLSMSRADMDVIHNLIIREISPMVSRLRLSYRDELQLENSIHKVKEVAANFMLKSYSIRNLIDIKSNSAITKLVQQTGFLGLQLSDKKKFYTKTLVEDMAIFCKRKYGRISSSGDFGIVKGCFFHGLDPYEEMAHSIAAREVIVRSSRGLAEPGTLFKNLMAVLRDIVITNDGTVRNTCSNSVIQFKYGVDSERGHQGLFEAGEPVGVLAATAMSNPAYKAVLDSSPNSNSSWELMKEVLLCKVNFQNTTNDRRVILYLNECHCGKRFCQENAACTVRNKLNKVSLKDTAVEFLVEYRKQPTISEIFGIDSCLHGHIHLNKTLLQDWNISMQDIHQKCEDVINSLGQKKKKKATDDFKRTSLSVSECCSFRDPCGSKGSDMPCLTFSYNATDPDLERTLDVLCNTVYPVLLEIVIKGDSRICSANIIWNSSDMTTWIRNRHASRRGEWVLDVTVEKSAVKQSGDAWRVVIDSCLSVLHLIDTKRSIPYSVKQVQELLGLSCAFEQAVQRLSASVRMVSKGVLKEHIILLANNMTCSGTMLGFNSGGYKALTRSLNIKAPFTEATLIAPRKCFEKAAEKCHTDSLSTVVGSCSWGKRVDVGTGSQFELLWNQKETGLDDKEETDVYSFLQMVISTTNADAFVSSPGFDVTEEEMAEWAESPERDSALGEPKFEDSADFQNLHDEGKPSGANWEKSSSWDNGCSGGSEWGVSKSTGGEANPESNWEKTTNVEKEDAWSSWNTRKDAQESSKSDSGGAWGIKTKDADADTTPNWETSPAPKDSIVPENNEPTSDVWGHKSVSDKSWDKKNWGTESAPAAWGSTDAAVWGSSDKKNSETESDAAAWGSRDKNNSDVGSGAGVLGPWNKKSSETESNGATWGSSDKTKSGAAAWNSWDKKNIETDSEPAAWGSQGKKNSETESGPAAWGAWDKKKSETEPGPAGWGMGDKKNSETELGPAAMGNWDKKKSDTKSGPAAWGSTDAAAWGSSDKNNSETESDAAAWGSRNKKTSEIESGAGAWGSWGQPSPTAEDKDTNEDDRNPWVSLKETKSREKDDKERSQWGNPAKKFPSSGGWSNGGGADWKGNRNHTPRPPRSEDNLAPMFTATRQRLDSFTSEEQELLSDVEPVMRTLRKIMHPSAYPDGDPISDDDKTFVLEKILNFHPQKETKLGSGVDFITVDKHTIFSDSRCFFVVSTDGAKQDFSYRKSLNNYLMKKYPDRAEEFIDKYFTKPRPSGNRDRNNQDATPPGEEQSQPPNQSIGNGGDDFQTQTQSQSPSQTRAQSPSQAQAQSPSQTQSQSQSQSQSQSQSQSQSQSQSQSQSQSQSQSQSPSQTQTQSPSQTQAQAQSPSSQSPSQTQT