ID   TF2B_CALMQ              Reviewed;         336 AA.
AC   A8MCX6;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   04-DEC-2007, sequence version 1.
DT   27-MAR-2024, entry version 84.
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};
GN   OrderedLocusNames=Cmaq_0797;
OS   Caldivirga maquilingensis (strain ATCC 700844 / DSM 13496 / JCM 10307 /
OS   IC-167).
OC   Archaea; Thermoproteota; Thermoprotei; Thermoproteales; Thermoproteaceae;
OC   Caldivirga.
OX   NCBI_TaxID=397948;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700844 / DSM 13496 / JCM 10307 / IC-167;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Saunders E., Brettin T., Bruce D., Detter J.C.,
RA   Han C., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Ivanova N., Biddle J.F., Zhang Z., Fitz-Gibbon S.T., Lowe T.M.,
RA   Saltikov C., House C.H., Richardson P.;
RT   "Complete sequence of Caldivirga maquilingensis IC-167.";
RL   Submitted (OCT-2007) to the EMBL/GenBank/DDBJ databases.
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; CP000852; ABW01632.1; -; Genomic_DNA.
DR   RefSeq; WP_012185851.1; NC_009954.1.
DR   AlphaFoldDB; A8MCX6; -.
DR   SMR; A8MCX6; -.
DR   STRING; 397948.Cmaq_0797; -.
DR   GeneID; 5710362; -.
DR   KEGG; cma:Cmaq_0797; -.
DR   eggNOG; arCOG01981; Archaea.
DR   HOGENOM; CLU_043736_0_1_2; -.
DR   OrthoDB; 7429at2157; -.
DR   Proteomes; UP000001137; Chromosome.
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:0070897; P:transcription preinitiation complex assembly; IEA:InterPro.
DR   CDD; cd20549; CYCLIN_TFIIB_archaea_like_rpt1; 1.
DR   CDD; cd20550; CYCLIN_TFIIB_archaea_like_rpt2; 1.
DR   Gene3D; 1.10.472.170; -; 1.
DR   Gene3D; 1.10.472.10; Cyclin-like; 1.
DR   HAMAP; MF_00383; TF2B_arch; 1.
DR   InterPro; IPR013763; Cyclin-like_dom.
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:SF13; TRANSCRIPTION INITIATION FACTOR IIB; 1.
DR   PANTHER; PTHR11618; TRANSCRIPTION INITIATION FACTOR IIB-RELATED; 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; Cyclin-like; 2.
DR   SUPFAM; SSF57783; Zinc beta-ribbon; 1.
DR   PROSITE; PS00782; TFIIB; 1.
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..336
FT                   /note="Transcription initiation factor IIB"
FT                   /id="PRO_1000080104"
FT   REPEAT          152..235
FT                   /note="1"
FT   REPEAT          246..327
FT                   /note="2"
FT   ZN_FING         41..72
FT                   /note="TFIIB-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         45
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         48
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         64
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         67
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
SQ   SEQUENCE   336 AA;  38078 MW;  E87913321A7C1357 CRC64;
     MSTTQGGSNQ QDETRRELII QKFKLFRREG NNLEFVDQSG QKLRCPICGN TVFIEDAERG
     QIVCASCGYV LMEHILDTGP EWRAFTPEEK EDRARTGGPL ERVTSEELVT RIETTLKSPD
     LKKKLEILKY KKWQQRIRVQ TSYERNLVQA THELNRIAHQ LGVPKSCMDE ALAVYKQVLK
     SGLVKGRSVE AIIAACLHMA CRMQGMPRSL DEISQYTRAP RKEIARCFRL IARELRIRLP
     LSDPRQYVPK IVEQLKLPGD IAKEAIRVLE EAKDKGLTAG KDPAGLAAAA VYIASLLKGE
     VRTQKEIAQA AQVTEVTVRN RYKELAKELN IKIPIK
//