ID IF2_STRR6 Reviewed; 930 AA.
AC Q8DQV2;
DT 15-DEC-2003, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2003, sequence version 1.
DT 27-MAR-2024, entry version 127.
DE RecName: Full=Translation initiation factor IF-2 {ECO:0000255|HAMAP-Rule:MF_00100};
GN Name=infB {ECO:0000255|HAMAP-Rule:MF_00100}; OrderedLocusNames=spr0481;
OS Streptococcus pneumoniae (strain ATCC BAA-255 / R6).
OC Bacteria; Bacillota; Bacilli; Lactobacillales; Streptococcaceae;
OC Streptococcus.
OX NCBI_TaxID=171101;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-255 / R6;
RX PubMed=11544234; DOI=10.1128/jb.183.19.5709-5717.2001;
RA Hoskins J., Alborn W.E. Jr., Arnold J., Blaszczak L.C., Burgett S.,
RA DeHoff B.S., Estrem S.T., Fritz L., Fu D.-J., Fuller W., Geringer C.,
RA Gilmour R., Glass J.S., Khoja H., Kraft A.R., Lagace R.E., LeBlanc D.J.,
RA Lee L.N., Lefkowitz E.J., Lu J., Matsushima P., McAhren S.M., McHenney M.,
RA McLeaster K., Mundy C.W., Nicas T.I., Norris F.H., O'Gara M., Peery R.B.,
RA Robertson G.T., Rockey P., Sun P.-M., Winkler M.E., Yang Y.,
RA Young-Bellido M., Zhao G., Zook C.A., Baltz R.H., Jaskunas S.R.,
RA Rosteck P.R. Jr., Skatrud P.L., Glass J.I.;
RT "Genome of the bacterium Streptococcus pneumoniae strain R6.";
RL J. Bacteriol. 183:5709-5717(2001).
CC -!- FUNCTION: One of the essential components for the initiation of protein
CC synthesis. Protects formylmethionyl-tRNA from spontaneous hydrolysis
CC and promotes its binding to the 30S ribosomal subunits. Also involved
CC in the hydrolysis of GTP during the formation of the 70S ribosomal
CC complex. {ECO:0000255|HAMAP-Rule:MF_00100}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {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; AE007317; AAK99285.1; -; Genomic_DNA.
DR PIR; A97932; A97932.
DR RefSeq; NP_358075.1; NC_003098.1.
DR RefSeq; WP_000039219.1; NC_003098.1.
DR AlphaFoldDB; Q8DQV2; -.
DR SMR; Q8DQV2; -.
DR STRING; 171101.spr0481; -.
DR KEGG; spr:spr0481; -.
DR PATRIC; fig|171101.6.peg.528; -.
DR eggNOG; COG0532; Bacteria.
DR HOGENOM; CLU_006301_5_0_9; -.
DR Proteomes; UP000000586; 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 CDD; cd01887; IF2_eIF5B; 1.
DR CDD; cd03702; IF2_mtIF2_II; 1.
DR CDD; cd03692; mtIF2_IVc; 1.
DR Gene3D; 1.10.10.2480; -; 1.
DR Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1.
DR Gene3D; 2.40.30.10; Translation factors; 2.
DR Gene3D; 3.40.50.10050; Translation initiation factor IF- 2, domain 3; 1.
DR HAMAP; MF_00100_B; IF_2_B; 1.
DR InterPro; IPR044145; IF2_II.
DR InterPro; IPR006847; IF2_N.
DR InterPro; IPR027417; P-loop_NTPase.
DR InterPro; IPR005225; Small_GTP-bd_dom.
DR InterPro; IPR000795; T_Tr_GTP-bd_dom.
DR InterPro; IPR000178; TF_IF2_bacterial-like.
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 NCBIfam; TIGR00487; IF-2; 1.
DR NCBIfam; TIGR00231; small_GTP; 1.
DR PANTHER; PTHR43381:SF5; TR-TYPE G DOMAIN-CONTAINING PROTEIN; 1.
DR PANTHER; PTHR43381; TRANSLATION INITIATION FACTOR IF-2-RELATED; 1.
DR Pfam; PF00009; GTP_EFTU; 1.
DR Pfam; PF11987; IF-2; 1.
DR Pfam; PF04760; IF2_N; 2.
DR SUPFAM; SSF52156; Initiation factor IF2/eIF5b, domain 3; 1.
DR SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
DR SUPFAM; SSF50447; Translation proteins; 2.
DR PROSITE; PS51722; G_TR_2; 1.
DR PROSITE; PS01176; IF2; 1.
PE 3: Inferred from homology;
KW Cytoplasm; GTP-binding; Initiation factor; Nucleotide-binding;
KW Protein biosynthesis; Reference proteome.
FT CHAIN 1..930
FT /note="Translation initiation factor IF-2"
FT /id="PRO_0000137264"
FT DOMAIN 432..599
FT /note="tr-type G"
FT REGION 50..195
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 260..346
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 441..448
FT /note="G1"
FT /evidence="ECO:0000250"
FT REGION 466..470
FT /note="G2"
FT /evidence="ECO:0000250"
FT REGION 487..490
FT /note="G3"
FT /evidence="ECO:0000250"
FT REGION 541..544
FT /note="G4"
FT /evidence="ECO:0000250"
FT REGION 577..579
FT /note="G5"
FT /evidence="ECO:0000250"
FT COMPBIAS 64..94
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 104..131
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 132..156
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 157..192
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 264..298
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 299..333
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 441..448
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT BINDING 487..491
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT BINDING 541..544
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
SQ SEQUENCE 930 AA; 102937 MW; 1FD34F4AF9EE4115 CRC64;
MSKKRLYEIA KELGKESKEV VARAKELGLD VKSHSSSVEE AVAAKIAASF KPAAAPKVEA
KPAAPKVSAE KKTEKSEPAK PAVAKEEAKP AEPVAPKTEK VAAKPQSRNF KAEREARAKE
QAERRKQNKG NNRDQQQNGN RQKNDGRNGG KQGQSNRDNR RFNDQAKKQQ GQQKRRNERR
QQEDKRSNQA APRIDFKARA AALKAEQNAE YARSSEERFK QYQAAKEALA QANKRKEPEE
IFEEAAKLAE QAQQVQAVVE VVPEKKEPAV DTRRKKQARP DKNRDDYDHE EDGPRKQQKN
RSSQNQVRNQ KNSNWNNNKK NKKGNNKNNR NQTPKPVTER KFHELPTEFE YTDGMTVAEI
AKRIKREPAE IVKKLFMMGV MATQNQSLDG ETIELLMVDY GIEAKQKVEV DNADIERFFV
EDGYLNEDEL VERPPVVTIM GHVDHGKTTL LDTLRNSRVA TGEAGGITQH IGAYQIVENG
KKITFLDTPG HAAFTSMRAR GASVTDITIL VVAADDGVMP QTIEAINHSK AANVPIIVAI
NKIDKPGANP ERVIGELAEH GVMSTAWGGD SEFVEISAKF NQNIEELLET VLLVAEIQEL
KADPTVRAIG TVIEARLDKG KGAVATLLVQ QGTLNVQDPI VVGNTFGRVR AMTNDLGRRV
KVAGPSTPVS ITGLNEAPMA GDHFAVYEDE KSARAAGEER AKRALMKQRQ ATQRVSLENL
FDTLKAGELK SVNVIIKADV QGSVEALSAS LQKIDVEGVK VTIVHSAVGA INESDVTLAE
ASNAFIVGFN VRPTPQARQQ AEADDVEIRL HSIIYKVIEE MEEAMKGMLD PEFEEKVIGE
AVIRETFKVS KVGTIGGFMV INGKVARDSK VRVIRDGVVI YDGELASLKH YKDDVKEVTN
GREGGLMIDG YNDIKMDDVI EAYVMEEIKR
//
