ID   TF2B_METM6              Reviewed;         339 AA.
AC   A9A8Q0;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   15-JAN-2008, sequence version 1.
DT   03-AUG-2022, entry version 81.
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=MmarC6_0908;
OS   Methanococcus maripaludis (strain C6 / ATCC BAA-1332).
OC   Archaea; Euryarchaeota; Methanomada group; Methanococci; Methanococcales;
OC   Methanococcaceae; Methanococcus.
OX   NCBI_TaxID=444158;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=C6 / ATCC BAA-1332;
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., Clum A., Schmutz J., Larimer F., Land M., Hauser L.,
RA   Kyrpides N., Mikhailova N., Sieprawska-Lupa M., Whitman W.B.,
RA   Richardson P.;
RT   "Complete sequence of Methanococcus maripaludis C6.";
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; CP000867; ABX01723.1; -; Genomic_DNA.
DR   RefSeq; WP_012193675.1; NC_009975.1.
DR   AlphaFoldDB; A9A8Q0; -.
DR   SMR; A9A8Q0; -.
DR   STRING; 444158.MmarC6_0908; -.
DR   EnsemblBacteria; ABX01723; ABX01723; MmarC6_0908.
DR   GeneID; 5738226; -.
DR   KEGG; mmx:MmarC6_0908; -.
DR   eggNOG; arCOG01981; Archaea.
DR   HOGENOM; CLU_043736_0_1_2; -.
DR   OMA; DHDQRMK; -.
DR   OrthoDB; 35979at2157; -.
DR   PhylomeDB; A9A8Q0; -.
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; 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; Repeat; Transcription; Transcription regulation; Zinc;
KW   Zinc-finger.
FT   CHAIN           1..339
FT                   /note="Transcription initiation factor IIB"
FT                   /id="PRO_1000122400"
FT   REPEAT          156..239
FT                   /note="1"
FT   REPEAT          250..331
FT                   /note="2"
FT   ZN_FING         39..70
FT                   /note="TFIIB-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         43
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         46
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         62
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
FT   BINDING         65
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00469"
SQ   SEQUENCE   339 AA;  38227 MW;  C1A1C03435A5B95A CRC64;
     MKVEAITKEE TKKPERKIKL AIAKPEDYSN KNVILEKEEE LICPVCGSKN IIKDYERAEI
     VCEMCGCVLQ QNLFDVGPEW RAFDHEQRVK RSRVGAPMTY TIHDKGLSTV IDWRNKDSYG
     KDISADKRAQ LYRLRKWQRR IRVSDASERN LAFALSELDR IASKLGLPRN VRENAAVLYR
     GAVEKGLIRG RSIEGVAAAA LYAACRRCKV PRTLDEIAEV SRVDRKEIGR TYRFISRELN
     IRLAPTNPVD YVPRFASELK LPGEVESKAI SILQKAGEKG LTSGRGPTGV AAAAIYIASV
     LQGTRRTQRE VADVAGVTEV TIRNRYKELT EHLDIDVTL