ID   TF2B_PYRAE              Reviewed;         333 AA.
AC   Q8ZWS3;
DT   06-JUN-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   03-AUG-2022, entry version 111.
DE   RecName: Full=Transcription initiation factor IIB {ECO:0000255|HAMAP-Rule:MF_00383};
DE            Short=TFIIB {ECO:0000255|HAMAP-Rule:MF_00383};
GN   Name=tfb {ECO:0000255|HAMAP-Rule:MF_00383}; OrderedLocusNames=PAE1645;
OS   Pyrobaculum aerophilum (strain ATCC 51768 / DSM 7523 / JCM 9630 / CIP
OS   104966 / NBRC 100827 / IM2).
OC   Archaea; Crenarchaeota; Thermoprotei; Thermoproteales; Thermoproteaceae;
OC   Pyrobaculum.
OX   NCBI_TaxID=178306;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 51768 / DSM 7523 / JCM 9630 / CIP 104966 / NBRC 100827 / IM2;
RX   PubMed=11792869; DOI=10.1073/pnas.241636498;
RA   Fitz-Gibbon S.T., Ladner H., Kim U.-J., Stetter K.O., Simon M.I.,
RA   Miller J.H.;
RT   "Genome sequence of the hyperthermophilic crenarchaeon Pyrobaculum
RT   aerophilum.";
RL   Proc. Natl. Acad. Sci. U.S.A. 99:984-989(2002).
CC   -!- FUNCTION: Stabilizes TBP binding to an archaeal box-A promoter. Also
CC       responsible for recruiting RNA polymerase II to the pre-initiation
CC       complex (DNA-TBP-TFIIB). {ECO:0000255|HAMAP-Rule:MF_00383}.
CC   -!- SIMILARITY: Belongs to the TFIIB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00383}.
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DR   EMBL; AE009441; AAL63626.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q8ZWS3; -.
DR   SMR; Q8ZWS3; -.
DR   STRING; 178306.PAE1645; -.
DR   EnsemblBacteria; AAL63626; AAL63626; PAE1645.
DR   KEGG; pai:PAE1645; -.
DR   PATRIC; fig|178306.9.peg.1216; -.
DR   eggNOG; arCOG01981; Archaea.
DR   HOGENOM; CLU_043736_0_1_2; -.
DR   InParanoid; Q8ZWS3; -.
DR   OMA; RTQKDFA; -.
DR   Proteomes; UP000002439; Chromosome.
DR   GO; GO:0097550; C:transcription preinitiation complex; IBA:GO_Central.
DR   GO; GO:0003700; F:DNA-binding transcription factor activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0017025; F:TBP-class protein binding; IEA:InterPro.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006352; P:DNA-templated transcription, initiation; IBA:GO_Central.
DR   GO; GO:0070897; P:transcription preinitiation complex assembly; IEA:InterPro.
DR   CDD; cd00043; CYCLIN; 2.
DR   HAMAP; MF_00383; TF2B_arch; 1.
DR   InterPro; IPR013763; Cyclin-like.
DR   InterPro; IPR036915; Cyclin-like_sf.
DR   InterPro; IPR000812; TFIIB.
DR   InterPro; IPR023484; TFIIB_arc.
DR   InterPro; IPR023486; TFIIB_CS.
DR   InterPro; IPR013150; TFIIB_cyclin.
DR   InterPro; IPR013137; Znf_TFIIB.
DR   PANTHER; PTHR11618; PTHR11618; 1.
DR   Pfam; PF08271; TF_Zn_Ribbon; 1.
DR   Pfam; PF00382; TFIIB; 2.
DR   PRINTS; PR00685; TIFACTORIIB.
DR   SMART; SM00385; CYCLIN; 2.
DR   SUPFAM; SSF47954; SSF47954; 2.
DR   PROSITE; PS00782; TFIIB; 2.
DR   PROSITE; PS51134; ZF_TFIIB; 1.
PE   3: Inferred from homology;
KW   Metal-binding; Reference proteome; Repeat; Transcription;
KW   Transcription regulation; Zinc; Zinc-finger.
FT   CHAIN           1..333
FT                   /note="Transcription initiation factor IIB"
FT                   /id="PRO_0000119326"
FT   REPEAT          149..232
FT                   /note="1"
FT   REPEAT          243..324
FT                   /note="2"
FT   ZN_FING         33..64
FT                   /note="TFIIB-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         37
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         40
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         56
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         59
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
SQ   SEQUENCE   333 AA;  37342 MW;  862B380AA58D7E7A CRC64;
     MSVSNPPSSG KPLKLRVNKD SEGYLSLVTE SGEVYKCPIC GNDKFVYNYE RGEAVCIVCG
     AVVQEQLLDL GPEWRAFTSE EKGQRARTGA PLTRLISEAL TTVIDWRDKD VSGKELDIKR
     KLEVIRLRKW QTRARVQTSY ERNFIQAAQE LERLRSAMGI PRPCIEQALE IYRQALEKEL
     VRGRSVEAMA AAALYMACRM MKMPRPLDEL VRYTKASRRE VARCYRLLLR ELNVKVPISD
     PILYISRIAE QLKLSGEVVK TAIDILQKAK KAGITAGKDP AGLAAAAVYI ASLMHGDNRT
     QKDFAVAAGV TEVTVRNRYK ELAKALNIKV PVK