Protein: DNA-directed RNA polymerase I subunit rpa1 (P15398)
Organism: Schizosaccharomyces pombe (strain 972 / ATCC 24843) (Fission yeast)
Function: DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Largest and catalytic core component of RNA polymerase I which synthesizes ribosomal RNA precursors. Forms the polymerase active center together with the second largest subunit. A single stranded DNA template strand of the promoter is positioned within the central active site cleft of Pol I. A bridging helix emanates from RPA1 and crosses the cleft near the catalytic site and is thought to promote translocation of Pol I by acting as a ratchet that moves the RNA-DNA hybrid through the active site by switching from straight to bent conformations at each step of nucleotide addition (By similarity)
Subcellular location: Nucleus, nucleolus
Sequence: MNIAQPVSSEIKSVKFGIYDVDDVEKISVKQIVNPVLLDNLNHPTNGGLYDLALGPYLKNSVCATCHLDERYCPGHFGHIVLPIPAYHPLFFSQMYNLLRSTCLYCHHFKLSKVKVHLFFCRLKLLDYGLLNESEMVENVSLTEAIIKNSNGTPLEDGSDSEDSGLGHDDIAKDAATLMRIRDEFVAKSIADSRQNAHIDAQLTTLLLHERKKVVRAFYHAISSRKQCDNCQSFSPNFRKEGFAKIFEIPLSGKNLQFMEQTGKIRSDVLRDTSKKHHEDEGYDGDSDSSNESEVEGIDLFEEDPNPLKNKSKSPIAHGAKYMTSTEVRNHLRRLFVKENVVLSRLYAHKRGKPASADMFFLQNIAVPPTRFRPASKMGDEVHENIQNELLTRILQSSIQIASLSKDSTVEVNPDEKEGLERRSRAFELLINAFVQLQHDVNSLIDSNRNPSSGGQSRTVPPGIKQILEKKEGLFRKHMMGKRVNYAARSVISPDPNIETNEIGVPPVFATKLTYPEPVTLYNFNEMRNAVINGPHKWPGASHIQNEDGTLISLMPLTIEQRTALANQLLTPQSNLISSPYSYSRLINTNKKVYRHVRNGDMLILNRQPTLHKPSMMAHKARILPGEKTIRMHYANCNSYNADFDGDEMNMHFPQSTNARSEAQFIANTDSQYLVPTSGDPLRGLIQDHVVMGVWLTCKDTFYTRDEYQQLLFQALKPDETGMYGRIKTLPPAIQRPGIYWTGKQIISSVLLNLKPSDRPGLNLKSKAKVPGKYWSPDSEEGSVLFDDGELLCGILDKSSFGASAFGLVHSVHELYGPDIAGRLLSVLSRLFTAYAQMRGFTCRMDDLRLDEQGDNWRRQLLENGKSFGLEAASEYVGLSTDSPIALLNANLEEVYRDDEKLQGLDAAMKGKMNGLTSSIINKCIPDGLLTKFPYNHMQTMTVSGAKGSNVNVSQISCLLGQQELEGRRVPLMVSGKSLPSFVPYETSAKSGGFIASRFLTGIAPQEYYFHCMAGREGLIDTAVKTSRSGYLQRCLMKHLEGLCVQYDHTVRDSDGSIVQFHYGEDSLDVTKQKHLTQFEFSAKNYKSLIQKYKVKSVLSAVDSETASSYAKKALKKPYKYDPVLDKYPPSRYLGSVSEKFQRAVDEYTQKNPDKLIASKKESKLDDSLLNESKFKALMQLRYQQSLVDPGESVGVLASQSIGEPSTQMTLNTFHFAGFGAKNVTLGIPRLREIIMTASANIQTPTMTLRLNDGVSDKRASAFCKEVNKLVLSEVVRQVRVTEKISGQGSDEQSKTYAIRLDLYSRDEYQDEYGVLQEEIESTFSNRFLKILNRIIKSYLAKSKQRKSGGKDDTVPEVGQALKPLEDIDEAPIEGRAQEALEDEDNDATNEKMVSRSKQHASYEGPDEADKVALRQLKGSNKVEDVNMDEEEDEGFKSDESVSDFKERKLLEKQNTVSISERRELQLKTAKEILSNCKHLDFDYVNGEWATVELVFPINTEKLLMVSLVEKACSETVIHEIPGITRCFSKPPDSALDTVPKVITEGVNLKAIWEFYNEISMNDIYTNDIAAILRIYGVEAARNAIVHEVSSVFGVYGIAVDPRHLSLIADYMTFEGGYKAFNRMGIEYNTSPFAKMSFETTCHFLTEAALRGDVDDLSNPSSRLVVGRVGNFGTGSFDIFTPVVDSPAN
InterPro domains: - IPR044893: RNA polymerase Rpb1, clamp domain superfamily (homologous_superfamily) [2-133]
- IPR042102: RNA polymerase Rpb1, domain 3 superfamily (homologous_superfamily) [677-842]
- IPR007080: RNA polymerase Rpb1, domain 1 (domain) [9-477]
- IPR000722: RNA polymerase, alpha subunit (domain) [481-668]
- IPR006592: RNA polymerase, N-terminal (domain) [358-697]
- IPR007083: RNA polymerase Rpb1, domain 4 (domain) [912-995]
- IPR007066: RNA polymerase Rpb1, domain 3 (domain) [672-848]
- IPR047107: DNA-directed RNA pol I, largest subunit, C-terminal domain (domain) [1182-1680]
- IPR015699: DNA-directed RNA pol I, largest subunit, N-terminal domain (domain) [15-1048]
- IPR045867: DNA-directed RNA polymerase, subunit beta-prime (family) [15-1680]
- IPR038120: RNA polymerase Rpb1, funnel domain superfamily (homologous_superfamily) [881-980]
- IPR007081: RNA polymerase Rpb1, domain 5 (domain) [1002-1631]
Interaction partners: - DNA-directed RNA polymerases I and III subunit RPAC2
- Probable DNA-directed RNA polymerase I subunit RPA2
- DNA-directed RNA polymerases I and III subunit RPAC1
- DNA-directed RNA polymerases I, II, and III subunit RPABC1
- DNA-directed RNA polymerases I, II, and III subunit RPABC3
- DNA-directed RNA polymerases I, II, and III subunit RPABC4
- DNA-directed RNA polymerase I subunit rpa49
- DNA-directed RNA polymerase I subunit RPA12
- DNA-directed RNA polymerase I subunit rpa43
- DNA-directed RNA polymerases I, II, and III subunit RPABC2
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0044249 (cellular biosynthetic process), GO:0006725 (cellular aromatic compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0009059 (macromolecule biosynthetic process), GO:1901362 (organic cyclic compound biosynthetic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0090304 (nucleic acid metabolic process), GO:0019438 (aromatic compound biosynthetic process), GO:0010467 (gene expression), GO:0018130 (heterocycle biosynthetic process), GO:0034654 (nucleobase-containing compound biosynthetic process), GO:0016070 (RNA metabolic process), GO:0032774 (RNA biosynthetic process), GO:0097659 (nucleic acid-templated transcription), GO:0006351 (DNA-templated transcription), GO:0006353 (DNA-templated transcription termination), GO:0006383 (transcription by RNA polymerase III)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005829 (cytosol), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0031981 (nuclear lumen), GO:0005730 (nucleolus), GO:0005634 (nucleus)