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Database: UniProt
Entry: F0NFB5_SULIR
LinkDB: F0NFB5_SULIR
Original site: F0NFB5_SULIR 
ID   F0NFB5_SULIR            Unreviewed;       309 AA.
AC   F0NFB5;
DT   03-MAY-2011, integrated into UniProtKB/TrEMBL.
DT   03-MAY-2011, sequence version 1.
DT   24-JAN-2024, entry version 55.
DE   RecName: Full=Transcription initiation factor IIB {ECO:0000256|ARBA:ARBA00013932, ECO:0000256|HAMAP-Rule:MF_00383};
DE            Short=TFIIB {ECO:0000256|HAMAP-Rule:MF_00383};
GN   Name=tfb {ECO:0000256|HAMAP-Rule:MF_00383};
GN   OrderedLocusNames=SiRe_1555 {ECO:0000313|EMBL:ADX85619.1};
OS   Sulfolobus islandicus (strain REY15A).
OC   Archaea; Thermoproteota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Sulfolobus.
OX   NCBI_TaxID=930945 {ECO:0000313|EMBL:ADX85619.1, ECO:0000313|Proteomes:UP000002664};
RN   [1] {ECO:0000313|EMBL:ADX85619.1, ECO:0000313|Proteomes:UP000002664}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=REY15A {ECO:0000313|EMBL:ADX85619.1,
RC   ECO:0000313|Proteomes:UP000002664};
RX   PubMed=21278296; DOI=10.1128/JB.01487-10;
RA   Guo L., Brugger K., Liu C., Shah S.A., Zheng H., Zhu Y., Wang S.,
RA   Lillestol R.K., Chen L., Frank J., Prangishvili D., Paulin L., She Q.,
RA   Huang L., Garrett R.A.;
RT   "Genome analyses of icelandic strains of Sulfolobus islandicus, model
RT   organisms for genetic and virus-host interaction studies.";
RL   J. Bacteriol. 193:1672-1680(2011).
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:0000256|HAMAP-Rule:MF_00383}.
CC   -!- SIMILARITY: Belongs to the TFIIB family.
CC       {ECO:0000256|ARBA:ARBA00010857, ECO:0000256|HAMAP-Rule:MF_00383}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_00383}.
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DR   EMBL; CP002425; ADX85619.1; -; Genomic_DNA.
DR   AlphaFoldDB; F0NFB5; -.
DR   STRING; 930945.SiRe_1555; -.
DR   KEGG; sir:SiRe_1555; -.
DR   eggNOG; arCOG01981; Archaea.
DR   HOGENOM; CLU_043736_0_1_2; -.
DR   OMA; RTQKDFA; -.
DR   Proteomes; UP000002664; 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:0003743; F:translation initiation factor activity; IEA:UniProtKB-KW.
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; 2.
PE   3: Inferred from homology;
KW   Initiation factor {ECO:0000313|EMBL:ADX85619.1};
KW   Protein biosynthesis {ECO:0000313|EMBL:ADX85619.1};
KW   Repeat {ECO:0000256|ARBA:ARBA00022737, ECO:0000256|HAMAP-Rule:MF_00383};
KW   Transcription {ECO:0000256|ARBA:ARBA00023163, ECO:0000256|HAMAP-
KW   Rule:MF_00383};
KW   Transcription regulation {ECO:0000256|ARBA:ARBA00023015, ECO:0000256|HAMAP-
KW   Rule:MF_00383}.
FT   REPEAT          125..208
FT                   /note="1"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00383"
FT   DOMAIN          125..206
FT                   /note="Cyclin-like"
FT                   /evidence="ECO:0000259|SMART:SM00385"
FT   REPEAT          219..300
FT                   /note="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00383"
FT   DOMAIN          219..300
FT                   /note="Cyclin-like"
FT                   /evidence="ECO:0000259|SMART:SM00385"
SQ   SEQUENCE   309 AA;  34681 MW;  D28AAE5BCB5CFCDD CRC64;
     MLYLSEENKP VSTPCPPDKI IFDAERGEYI CSETGEVLED KIIDQGPEWR AFTPEEKEKR
     SRVGGPLNNT IHDRGLSTLI DWKDKDAMGR TLDPKRRLEA LRWRKWQIRA RIQSSIDRNL
     AQAMNELERI GNLLNLPKSV KDEAALIYRK AVEKGLVRGR SIESVVAAAI YAACRRMKLA
     RTLDEIAQYT KANRKEVARC YRLLLRELDV SVPVSDPKDY VTRIANLLGL SGAVMKTAAE
     IIDKAKGSGL TAGKDPAGLA AAAIYIASLL HDERRTQKEI AQVAGVTEVT VRNRYKELTQ
     ELKISIPTQ
//
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