Protein
DNA-directed RNA polymerase D subunit 2b
Organism
Arabidopsis thaliana
Function
DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Second largest component of RNA polymerase IVa and IVb which mediate short-interfering RNAs (siRNA) accumulation and subsequent RNA-directed DNA methylation-dependent (RdDM) silencing of endogenous repeated sequences, including transposable largest subunit. Also required for full erasure of methylation elements. Required for intercellular RNA interference (RNAi) leading to systemic post-transcriptional gene silencing (Probable).
Similarity
Belongs to the RNA polymerase beta chain family.
Sequence
MDVDEIESAGQINISELGESFLQTFCKKAATSFFEEFGLISHQLNSYNFFIEHGLQNVFESFGDILVEPSFDVIKKKDGDWRYATVFKKIVIKHDKFKTGQDEYVEKEILDVKKQDILIGSIPVMVKSVLCKTSEKGKENCKKGNCAFDQGGYFVIKGAEKVFIAQEQMCTKRLWISNSPWTVSFRSETKRNRFIVRLSENEKAEDYKIMEKVLTVYFLSTEIPVWLLFFALGVSSDKEAMDLIAFDGDDASITNSLIASIHEADAVCEAFRCGNNALTYVEHQIKSTKFPPAESVDDCLRLYLFPCLQGLKKKARFLGYMVKCLLSAYAGKRKCENRDSFRNKRIELAGELLEREIRVHLAHARRKMTRAMQKQLSGDGDLKPIEHYLDASVITNGLNRAFSTGAWSHPFRKMERVSGVVANLGRANPLQTLIDLRRTRQQVLYTGKVGDARHPHPSHWGRVCFLSTPDGENCGLVKNMSLLGLVSTQGLESVVEMLFTCGMEELMNDTSTPLCGKHKVLLNGDWVGLCADSESFVGELKSRRRQSELPLEMEIKRDKDDNEVRIFTDAGRLLRPLLVVENLHKLKQDKPTQYPFKHLLDQGILELIGIEEEEDCTTAWGIKQLLKEPKNYTHCELDLSFLLGVSCAIVPFANHDHGKRVLYQSQKHCQQAIGFSSTNPNIRCDTLSQQLFYPQKPLFKTLASECLEKEVLFNGQNAIVAVNVHLGYNQEDSIVMNKASLERGMFRSEQIRSYKAEVDTKDSEKRKKMDELVQFGKTYSKIGKVDSLEDDGFPFIGANMSTGDIVIGRCTESGADHSIKLKHTERGIVQKVVLSSNDEGKNFAAVSLRQVRSPCLGDKFSSMHGQKGVLGYLEEQQNFPFTIQGIVPDIVINPHAFPSRQTPGQLLEAALSKGIACPIQKKEGSSAAYTKLTRHATPFSTPGVTEITEQLHRAGFSRWGNERVYNGRSGEMMRSLIFMGPTFYQRLVHMSENKVKFRNTGPVHPLTRQPVADRKRFGGIRFGEMERDCLIAHGASANLHERLFTLSDSSQMHICRKCKTYANVIERTPSSGRKIRGPYCRVCASSDHVVRVYVPYGAKLLCQELFSMGITLNFDTKLC