ID   RPOA_PSINU              Reviewed;         340 AA.
AC   Q8WHZ1;
DT   30-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=DNA-directed RNA polymerase subunit alpha {ECO:0000255|HAMAP-Rule:MF_00059};
DE            Short=PEP {ECO:0000255|HAMAP-Rule:MF_00059};
DE            EC=2.7.7.6 {ECO:0000255|HAMAP-Rule:MF_00059};
DE   AltName: Full=Plastid-encoded RNA polymerase subunit alpha {ECO:0000255|HAMAP-Rule:MF_00059};
DE            Short=RNA polymerase subunit alpha {ECO:0000255|HAMAP-Rule:MF_00059};
GN   Name=rpoA {ECO:0000255|HAMAP-Rule:MF_00059};
OS   Psilotum nudum (Whisk fern) (Lycopodium nudum).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Polypodiopsida; Ophioglossidae; Psilotales; Psilotaceae; Psilotum.
OX   NCBI_TaxID=3240;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Kingyoku;
RX   PubMed=15240838; DOI=10.1093/molbev/msh203;
RA   Nishiyama T., Wolf P.G., Kugita M., Sinclair R.B., Sugita M., Sugiura C.,
RA   Wakasugi T., Yamada K., Yoshinaga K., Yamaguchi K., Ueda K., Hasebe M.;
RT   "Chloroplast phylogeny indicates that bryophytes are monophyletic.";
RL   Mol. Biol. Evol. 21:1813-1819(2004).
CC   -!- FUNCTION: DNA-dependent RNA polymerase catalyzes the transcription of
CC       DNA into RNA using the four ribonucleoside triphosphates as substrates.
CC       {ECO:0000255|HAMAP-Rule:MF_00059}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate +
CC         RNA(n+1); Xref=Rhea:RHEA:21248, Rhea:RHEA-COMP:14527, Rhea:RHEA-
CC         COMP:17342, ChEBI:CHEBI:33019, ChEBI:CHEBI:61557, ChEBI:CHEBI:140395;
CC         EC=2.7.7.6; Evidence={ECO:0000255|HAMAP-Rule:MF_00059};
CC   -!- SUBUNIT: In plastids the minimal PEP RNA polymerase catalytic core is
CC       composed of four subunits: alpha, beta, beta', and beta''. When a
CC       (nuclear-encoded) sigma factor is associated with the core the
CC       holoenzyme is formed, which can initiate transcription.
CC       {ECO:0000255|HAMAP-Rule:MF_00059}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast.
CC   -!- DOMAIN: The N-terminal domain is essential for RNAP assembly and basal
CC       transcription, whereas the C-terminal domain is involved in interaction
CC       with transcriptional regulators and with upstream promoter elements.
CC       {ECO:0000255|HAMAP-Rule:MF_00059}.
CC   -!- SIMILARITY: Belongs to the RNA polymerase alpha chain family.
CC       {ECO:0000255|HAMAP-Rule:MF_00059}.
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DR   EMBL; AP004638; BAB84248.1; -; Genomic_DNA.
DR   RefSeq; NP_569660.1; NC_003386.1.
DR   AlphaFoldDB; Q8WHZ1; -.
DR   SMR; Q8WHZ1; -.
DR   PRIDE; Q8WHZ1; -.
DR   GeneID; 2545166; -.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0000428; C:DNA-directed RNA polymerase complex; IEA:UniProtKB-KW.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003899; F:DNA-directed 5'-3' RNA polymerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0046983; F:protein dimerization activity; IEA:InterPro.
DR   GO; GO:0006351; P:transcription, DNA-templated; IEA:UniProtKB-UniRule.
DR   Gene3D; 2.170.120.12; -; 1.
DR   Gene3D; 3.30.1360.10; -; 1.
DR   HAMAP; MF_00059; RNApol_bact_RpoA; 1.
DR   InterPro; IPR011262; DNA-dir_RNA_pol_insert.
DR   InterPro; IPR011263; DNA-dir_RNA_pol_RpoA/D/Rpb3.
DR   InterPro; IPR011773; DNA-dir_RpoA.
DR   InterPro; IPR036603; RBP11-like.
DR   InterPro; IPR011260; RNAP_asu_C.
DR   InterPro; IPR036643; RNApol_insert_sf.
DR   PANTHER; PTHR32108; PTHR32108; 1.
DR   Pfam; PF01000; RNA_pol_A_bac; 1.
DR   Pfam; PF03118; RNA_pol_A_CTD; 1.
DR   Pfam; PF01193; RNA_pol_L; 1.
DR   SMART; SM00662; RPOLD; 1.
DR   SUPFAM; SSF55257; SSF55257; 1.
DR   SUPFAM; SSF56553; SSF56553; 1.
DR   TIGRFAMs; TIGR02027; rpoA; 1.
PE   3: Inferred from homology;
KW   Chloroplast; DNA-directed RNA polymerase; Nucleotidyltransferase; Plastid;
KW   Transcription; Transferase.
FT   CHAIN           1..340
FT                   /note="DNA-directed RNA polymerase subunit alpha"
FT                   /id="PRO_0000175489"
FT   REGION          1..233
FT                   /note="Alpha N-terminal domain (alpha-NTD)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00059"
FT   REGION          264..340
FT                   /note="Alpha C-terminal domain (alpha-CTD)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00059"
SQ   SEQUENCE   340 AA;  38532 MW;  52683E198E190130 CRC64;
     MIQDEIPIPV QTLQWKCIES KKEGKRLHYG RFAVSPFRKG QASTVGVAMR RALLGEVEGT
     SITYAKFKNV VHEYSTLVGI KESIHDILIN LKEIVLQSDS YETQKASISI LGPRDVTAGD
     ILLPTSVKII DASQHIATIT TAIPLDVELR IERDCGYRTL NLKESQSGEF FIDALFTPIR
     NANYSIHSFE SNNKVREILF LEVWTNGSLT PGAALSEASR DLIDLFIIFL NMEKEESIKE
     IENNELNIKN FPSTSISVDI DRMAKEVAFK QIFIDQLELP ARAYNCLKKM QVHTVSDLLK
     YTQYDLKKVK NFGNKSVEQV VEALQERFAI QLPKDQFNIS