ID   IF2P_SULTO              Reviewed;         602 AA.
AC   Q976A1;
DT   05-MAR-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 120.
DE   RecName: Full=Probable translation initiation factor IF-2 {ECO:0000255|HAMAP-Rule:MF_00100};
GN   Name=infB {ECO:0000255|HAMAP-Rule:MF_00100}; OrderedLocusNames=STK_02790;
OS   Sulfurisphaera tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7)
OS   (Sulfolobus tokodaii).
OC   Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Sulfurisphaera.
OX   NCBI_TaxID=273063;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 16993 / JCM 10545 / NBRC 100140 / 7;
RX   PubMed=11572479; DOI=10.1093/dnares/8.4.123;
RA   Kawarabayasi Y., Hino Y., Horikawa H., Jin-no K., Takahashi M., Sekine M.,
RA   Baba S., Ankai A., Kosugi H., Hosoyama A., Fukui S., Nagai Y.,
RA   Nishijima K., Otsuka R., Nakazawa H., Takamiya M., Kato Y., Yoshizawa T.,
RA   Tanaka T., Kudoh Y., Yamazaki J., Kushida N., Oguchi A., Aoki K.,
RA   Masuda S., Yanagii M., Nishimura M., Yamagishi A., Oshima T., Kikuchi H.;
RT   "Complete genome sequence of an aerobic thermoacidophilic Crenarchaeon,
RT   Sulfolobus tokodaii strain7.";
RL   DNA Res. 8:123-140(2001).
CC   -!- FUNCTION: Function in general translation initiation by promoting the
CC       binding of the formylmethionine-tRNA to ribosomes. Seems to function
CC       along with eIF-2. {ECO:0000255|HAMAP-Rule:MF_00100}.
CC   -!- SIMILARITY: Belongs to the TRAFAC class translation factor GTPase
CC       superfamily. Classic translation factor GTPase family. IF-2 subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_00100}.
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DR   EMBL; BA000023; BAB65247.1; -; Genomic_DNA.
DR   RefSeq; WP_010978230.1; NC_003106.2.
DR   AlphaFoldDB; Q976A1; -.
DR   SMR; Q976A1; -.
DR   STRING; 273063.STK_02790; -.
DR   EnsemblBacteria; BAB65247; BAB65247; STK_02790.
DR   GeneID; 1458181; -.
DR   KEGG; sto:STK_02790; -.
DR   PATRIC; fig|273063.9.peg.331; -.
DR   eggNOG; arCOG01560; Archaea.
DR   OMA; FRQSKPA; -.
DR   OrthoDB; 17053at2157; -.
DR   Proteomes; UP000001015; Chromosome.
DR   GO; GO:0005525; F:GTP binding; IEA:UniProtKB-KW.
DR   GO; GO:0003924; F:GTPase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0003743; F:translation initiation factor activity; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.10050; -; 1.
DR   Gene3D; 3.40.50.300; -; 1.
DR   HAMAP; MF_00100_A; IF_2_A; 1.
DR   InterPro; IPR004161; EFTu-like_2.
DR   InterPro; IPR029459; EFTU-type.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR005225; Small_GTP-bd_dom.
DR   InterPro; IPR000795; T_Tr_GTP-bd_dom.
DR   InterPro; IPR004544; TF_aIF-2_arc.
DR   InterPro; IPR015760; TIF_IF2.
DR   InterPro; IPR023115; TIF_IF2_dom3.
DR   InterPro; IPR036925; TIF_IF2_dom3_sf.
DR   InterPro; IPR009000; Transl_B-barrel_sf.
DR   PANTHER; PTHR43381; PTHR43381; 1.
DR   Pfam; PF00009; GTP_EFTU; 1.
DR   Pfam; PF03144; GTP_EFTU_D2; 1.
DR   Pfam; PF14578; GTP_EFTU_D4; 1.
DR   Pfam; PF11987; IF-2; 1.
DR   PRINTS; PR00315; ELONGATNFCT.
DR   SUPFAM; SSF50447; SSF50447; 1.
DR   SUPFAM; SSF52156; SSF52156; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   TIGRFAMs; TIGR00491; aIF-2; 1.
DR   TIGRFAMs; TIGR00231; small_GTP; 1.
DR   PROSITE; PS51722; G_TR_2; 1.
PE   3: Inferred from homology;
KW   GTP-binding; Initiation factor; Nucleotide-binding; Protein biosynthesis;
KW   Reference proteome.
FT   CHAIN           1..602
FT                   /note="Probable translation initiation factor IF-2"
FT                   /id="PRO_0000137309"
FT   DOMAIN          10..227
FT                   /note="tr-type G"
FT   REGION          19..26
FT                   /note="G1"
FT                   /evidence="ECO:0000250"
FT   REGION          44..48
FT                   /note="G2"
FT                   /evidence="ECO:0000250"
FT   REGION          83..86
FT                   /note="G3"
FT                   /evidence="ECO:0000250"
FT   REGION          137..140
FT                   /note="G4"
FT                   /evidence="ECO:0000250"
FT   REGION          205..207
FT                   /note="G5"
FT                   /evidence="ECO:0000250"
FT   BINDING         19..26
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT   BINDING         83..87
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT   BINDING         137..140
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
SQ   SEQUENCE   602 AA;  67130 MW;  99E13842DF30BDC6 CRC64;
     MSQQLQSRRL RQPIVVVLGH VDHGKTTLLD KIRGTAVVKK EPGEMTQEVG ASFVPTSVIE
     KIAEPLKKTF PIKLEIPGLL FIDTPGHELF SNLRRRGGSV ADIAILVVDV VEGFQKQTYE
     SLEILRSRKV PFLVAANKID RIPGWKPIDT YSFLESIKSQ RKDVQTQLDN YVYRLVGQLA
     ELGFNADRFD RIRDFTKTVA IVPVSAKTGE GIAELLALLA GLTQNYMKTK LRFAEGPAKG
     VILEVKELQG LGYTIDVIIY DGILKKNDTI IIGGLNGPIV TKVRSILVPK PLQDIKVVKT
     DLTQIDEVYA AAGVKIYAPE LENALAGSPL FVAENEQQIE EYKKIIQEEI ASVKYYNANI
     AGIVVKADSL GSLEAIVEGL KQKNIPIRLA DIGPITKKDI TEAELTLQEA KEYGIIAAFR
     VKPLQGIEVP NNIKLIYSEI IYQLIDDIEK YITEVRESEK RRTLDSLILP GKFRLIPGYV
     FRRSDPVIVG VEVLGGIIRP KFPVMKKDGK RVGEILQIQD NKKSVDRATK GMEVAVSIKG
     NIMVGRQIDE GEILYTDVPK EDLEILLTKY KDIITDDMKE VIKEIINIKR VNDPTYALGL
     KV