ID   IF2P_SACS2              Reviewed;         600 AA.
AC   Q980Q8;
DT   05-MAR-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2001, sequence version 1.
DT   03-AUG-2022, entry version 114.
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=SSO0228;
OS   Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)
OS   (Sulfolobus solfataricus).
OC   Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Saccharolobus.
OX   NCBI_TaxID=273057;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 35092 / DSM 1617 / JCM 11322 / P2;
RX   PubMed=11427726; DOI=10.1073/pnas.141222098;
RA   She Q., Singh R.K., Confalonieri F., Zivanovic Y., Allard G., Awayez M.J.,
RA   Chan-Weiher C.C.-Y., Clausen I.G., Curtis B.A., De Moors A., Erauso G.,
RA   Fletcher C., Gordon P.M.K., Heikamp-de Jong I., Jeffries A.C., Kozera C.J.,
RA   Medina N., Peng X., Thi-Ngoc H.P., Redder P., Schenk M.E., Theriault C.,
RA   Tolstrup N., Charlebois R.L., Doolittle W.F., Duguet M., Gaasterland T.,
RA   Garrett R.A., Ragan M.A., Sensen C.W., Van der Oost J.;
RT   "The complete genome of the crenarchaeon Sulfolobus solfataricus P2.";
RL   Proc. Natl. Acad. Sci. U.S.A. 98:7835-7840(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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AE006641; AAK40570.1; -; Genomic_DNA.
DR   PIR; C90164; C90164.
DR   RefSeq; WP_009990481.1; NC_002754.1.
DR   AlphaFoldDB; Q980Q8; -.
DR   SMR; Q980Q8; -.
DR   STRING; 273057.SSO0228; -.
DR   EnsemblBacteria; AAK40570; AAK40570; SSO0228.
DR   GeneID; 44129198; -.
DR   KEGG; sso:SSO0228; -.
DR   PATRIC; fig|273057.12.peg.225; -.
DR   eggNOG; arCOG01560; Archaea.
DR   HOGENOM; CLU_002656_3_3_2; -.
DR   InParanoid; Q980Q8; -.
DR   OMA; FRQSKPA; -.
DR   PhylomeDB; Q980Q8; -.
DR   Proteomes; UP000001974; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
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; IBA:GO_Central.
DR   GO; GO:0006413; P:translational initiation; IBA:GO_Central.
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..600
FT                   /note="Probable translation initiation factor IF-2"
FT                   /id="PRO_0000137308"
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   600 AA;  66934 MW;  74F21DF4F4C05287 CRC64;
     MKISNSERRL RQPIVVVLGH VDHGKTTLLD KIRGTTVVKK EPGEMTQEVG ASFVPSYIIE
     KLAEPLKKVI PIKLQIPGLL FIDTPGHEYF SNLRRRGGSV ADIAILVVDI TEGLQKQSIE
     SIQILRERKV PFLIAANKID KIPGWKSNND IPFLASIEKQ RNDVKVYLDN LVYNLVSQLA
     NLGFSSERYD RIKDFTKTVA IVPVSAKTGE GVADLLALLA GLTQRYLETR LKFAEGPAKG
     VILEVKEDPG LGHTIDVIIY DGVLKKNDTI ILGGINGIII TKVRGIFVPR PLQDMKLSKY
     DLTPIDEVYA AAGVKISAPN LEEALAGSPI YVVEDESKVE RYKQQIEEEI KEVRLYSDID
     GIILKADSLG TLEALVSALQ REGIPIRLAD IGPISKRDVI EASIVAQRSK EYGIIAAFRV
     KLLQGIDTSG IKILYNEIIY QLIEDIKKHI NDVREAEKRR TFDTLILPGK IKILPGYVFR
     RSDPVVVGIE VIGGIIRPKY PLIKEDGRRV GEVLQIQDNK KSLERATKGM EVAISIKGNI
     MIGRHVNEGD VLYTDVPKED LEILVNKYPS SITDDMREVI KEIIRIKRKE DPLYGLGLQI