ID IF2_LACGA Reviewed; 882 AA.
AC Q044B7;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 14-NOV-2006, sequence version 1.
DT 27-MAR-2024, entry version 97.
DE RecName: Full=Translation initiation factor IF-2 {ECO:0000255|HAMAP-Rule:MF_00100};
GN Name=infB {ECO:0000255|HAMAP-Rule:MF_00100}; OrderedLocusNames=LGAS_0814;
OS Lactobacillus gasseri (strain ATCC 33323 / DSM 20243 / BCRC 14619 / CIP
OS 102991 / JCM 1131 / KCTC 3163 / NCIMB 11718 / NCTC 13722 / AM63).
OC Bacteria; Bacillota; Bacilli; Lactobacillales; Lactobacillaceae;
OC Lactobacillus.
OX NCBI_TaxID=324831;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 33323 / DSM 20243 / BCRC 14619 / CIP 102991 / JCM 1131 / KCTC
RC 3163 / NCIMB 11718 / NCTC 13722 / AM63;
RX PubMed=17030793; DOI=10.1073/pnas.0607117103;
RA Makarova K.S., Slesarev A., Wolf Y.I., Sorokin A., Mirkin B., Koonin E.V.,
RA Pavlov A., Pavlova N., Karamychev V., Polouchine N., Shakhova V.,
RA Grigoriev I., Lou Y., Rohksar D., Lucas S., Huang K., Goodstein D.M.,
RA Hawkins T., Plengvidhya V., Welker D., Hughes J., Goh Y., Benson A.,
RA Baldwin K., Lee J.-H., Diaz-Muniz I., Dosti B., Smeianov V., Wechter W.,
RA Barabote R., Lorca G., Altermann E., Barrangou R., Ganesan B., Xie Y.,
RA Rawsthorne H., Tamir D., Parker C., Breidt F., Broadbent J.R., Hutkins R.,
RA O'Sullivan D., Steele J., Unlu G., Saier M.H. Jr., Klaenhammer T.,
RA Richardson P., Kozyavkin S., Weimer B.C., Mills D.A.;
RT "Comparative genomics of the lactic acid bacteria.";
RL Proc. Natl. Acad. Sci. U.S.A. 103:15611-15616(2006).
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}.
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DR EMBL; CP000413; ABJ60205.1; -; Genomic_DNA.
DR AlphaFoldDB; Q044B7; -.
DR SMR; Q044B7; -.
DR KEGG; lga:LGAS_0814; -.
DR HOGENOM; CLU_006301_5_0_9; -.
DR Proteomes; UP000000664; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
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 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.
FT CHAIN 1..882
FT /note="Translation initiation factor IF-2"
FT /id="PRO_0000335481"
FT DOMAIN 383..552
FT /note="tr-type G"
FT REGION 50..299
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 392..399
FT /note="G1"
FT /evidence="ECO:0000250"
FT REGION 417..421
FT /note="G2"
FT /evidence="ECO:0000250"
FT REGION 438..441
FT /note="G3"
FT /evidence="ECO:0000250"
FT REGION 492..495
FT /note="G4"
FT /evidence="ECO:0000250"
FT REGION 528..530
FT /note="G5"
FT /evidence="ECO:0000250"
FT COMPBIAS 63..98
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 109..186
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 234..264
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 279..297
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 392..399
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT BINDING 438..442
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
FT BINDING 492..495
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00100"
SQ SEQUENCE 882 AA; 98854 MW; 1856D4098F9D150A CRC64;
MMAKKRIYEV AKELGIENKI VVKKAQDLGF DVKSHMSSLD DKQVSKLVDS FKSANTTKPS
TEKDSKNSSR KEKTKIKVSV GAIRRRDNKN DHDNRHGNNK RRNNKFKKQQ NDRRAERNKP
QTEAKSAARD LLNKFKKKQR AEASELNAQT EASRRKWHQE QNPQRSKVKK VENTRKPKEE
KLEGAAAVKA RVQASQKPVG PKIIKPSPAR NKAKRPTVKK VEPIAPVVPA PQKEETKPTR
KKDFTRKKRE VPDYERERSE HSDKARRRRN KKNKRINQSK EIKKQPTQRK ERPLPETLVY
EEGMNAQDLG KLLHREPAEI VKKLFMLGVM TNQNQSLDKD TIELLAAEYG IEAQEKVHED
ISDIDTLYTK EMEESKASKH QEKRPPVVTI MGHVDHGKTT LLDRLRHTNV SEHEAGGITQ
KIGAYQVRID DRLITFLDTP GHAAFSNMRA RGAEITDIVV LVVAADDGVM PQTIEAIDHA
KSAGVPIIVA VNKIDKPGAN PDHVMEQLMK YGLVPEDWGG DTIFVKISAK TGKNVEELLQ
MILLQADVME LKADPDQKAI GTVIEARLDK GRGSVADVLV QQGTLKVGDP IVVGDTFGRV
RVMTNDKGRR VKKATPSAPV EITGLNDVPE AADKLVVFED EKTARSVGEQ RAKNALEKQR
ENVQHVTLDN LFDTMKKENM KEVDIVLKAD VQGSAEALQQ SLEKIEVEGV RVNIIHSGVG
AINESDVTLA GASNAFIVGF NVRPTNTAKS QADAEGVDIR LYNIIYKVMD DVEAAMKGML
EPTYEEKVTG NLTVRETWKV SKIGTIAGAF VDNGYVTRDS GIRVIRDGIV KYDGKVASLK
RFKDDVKEVK QGFDCGITIE NFNDIKVDDQ LEAYEMQEVP VK
//
