ID   LEPA_LACCB              Reviewed;         612 AA.
AC   B3WEQ5;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 1.
DT   03-AUG-2022, entry version 82.
DE   RecName: Full=Elongation factor 4 {ECO:0000255|HAMAP-Rule:MF_00071};
DE            Short=EF-4 {ECO:0000255|HAMAP-Rule:MF_00071};
DE            EC=3.6.5.n1 {ECO:0000255|HAMAP-Rule:MF_00071};
DE   AltName: Full=Ribosomal back-translocase LepA {ECO:0000255|HAMAP-Rule:MF_00071};
GN   Name=lepA {ECO:0000255|HAMAP-Rule:MF_00071}; OrderedLocusNames=LCABL_17760;
OS   Lacticaseibacillus casei (strain BL23) (Lactobacillus casei).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Lacticaseibacillus.
OX   NCBI_TaxID=543734;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=BL23;
RA   Maze A., Boel G., Bourand A., Loux V., Gibrat J.F., Zuniga M., Hartke A.,
RA   Deutscher J.;
RT   "Lactobacillus casei BL23 complete genome sequence.";
RL   Submitted (JUN-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Required for accurate and efficient protein synthesis under
CC       certain stress conditions. May act as a fidelity factor of the
CC       translation reaction, by catalyzing a one-codon backward translocation
CC       of tRNAs on improperly translocated ribosomes. Back-translocation
CC       proceeds from a post-translocation (POST) complex to a pre-
CC       translocation (PRE) complex, thus giving elongation factor G a second
CC       chance to translocate the tRNAs correctly. Binds to ribosomes in a GTP-
CC       dependent manner. {ECO:0000255|HAMAP-Rule:MF_00071}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=GTP + H2O = GDP + H(+) + phosphate; Xref=Rhea:RHEA:19669,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:37565,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:58189; EC=3.6.5.n1;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00071};
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_00071};
CC       Peripheral membrane protein {ECO:0000255|HAMAP-Rule:MF_00071};
CC       Cytoplasmic side {ECO:0000255|HAMAP-Rule:MF_00071}.
CC   -!- SIMILARITY: Belongs to the TRAFAC class translation factor GTPase
CC       superfamily. Classic translation factor GTPase family. LepA subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_00071}.
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DR   EMBL; FM177140; CAQ66856.1; -; Genomic_DNA.
DR   RefSeq; WP_003575274.1; NC_010999.1.
DR   AlphaFoldDB; B3WEQ5; -.
DR   SMR; B3WEQ5; -.
DR   KEGG; lcb:LCABL_17760; -.
DR   HOGENOM; CLU_009995_3_3_9; -.
DR   OMA; MVQIAIQ; -.
DR   OrthoDB; 182107at2; -.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0005525; F:GTP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003924; F:GTPase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0043022; F:ribosome binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003746; F:translation elongation factor activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0045727; P:positive regulation of translation; IEA:UniProtKB-UniRule.
DR   CDD; cd03709; lepA_C; 1.
DR   Gene3D; 3.30.70.2570; -; 1.
DR   Gene3D; 3.40.50.300; -; 1.
DR   HAMAP; MF_00071; LepA; 1.
DR   InterPro; IPR006297; EF-4.
DR   InterPro; IPR035647; EFG_III/V.
DR   InterPro; IPR000640; EFG_V-like.
DR   InterPro; IPR004161; EFTu-like_2.
DR   InterPro; IPR038363; LepA_C_sf.
DR   InterPro; IPR013842; LepA_CTD.
DR   InterPro; IPR035654; LepA_IV.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR005225; Small_GTP-bd_dom.
DR   InterPro; IPR000795; T_Tr_GTP-bd_dom.
DR   PANTHER; PTHR43512; PTHR43512; 1.
DR   Pfam; PF00679; EFG_C; 1.
DR   Pfam; PF00009; GTP_EFTU; 1.
DR   Pfam; PF03144; GTP_EFTU_D2; 1.
DR   Pfam; PF06421; LepA_C; 1.
DR   PRINTS; PR00315; ELONGATNFCT.
DR   SMART; SM00838; EFG_C; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   SUPFAM; SSF54980; SSF54980; 2.
DR   TIGRFAMs; TIGR01393; lepA; 1.
DR   TIGRFAMs; TIGR00231; small_GTP; 1.
DR   PROSITE; PS51722; G_TR_2; 1.
PE   3: Inferred from homology;
KW   Cell membrane; GTP-binding; Hydrolase; Membrane; Nucleotide-binding;
KW   Protein biosynthesis.
FT   CHAIN           1..612
FT                   /note="Elongation factor 4"
FT                   /id="PRO_1000092411"
FT   DOMAIN          11..193
FT                   /note="tr-type G"
FT   BINDING         23..28
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00071"
FT   BINDING         140..143
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00071"
SQ   SEQUENCE   612 AA;  68392 MW;  013A5F65F43C429A CRC64;
     MNQEEMLDRQ KHIRNFSIIA HIDHGKSTLA DRILELTDTI AKRDMQAQVL DDMALERERG
     ITIKLNAVEL HYKAKNGETY IFHLIDTPGH VDFSYEVSRS LAACEGALLV VDATQGVEAQ
     TLANVYLAID DDLEIIPVIN KVDLPSAQPD VVKEEIEEMI GLDASDAILA SGKTGLGVPE
     ILERIVTDVP APSGDLNAPL QALIFDSVYD DYRGVVLDVR VKEGQVKVGD TIQLMSNGKQ
     FQVTEVGVMS PKAVKRDFLM VGDVGYITAA IKTIQDTRVG DTVTLADRPA EKPLKGYRKI
     TPMVYSGLFP VDNAKFNDLR EALEKLQLND AALEFEPETS QALGFGFRCG FLGLLHMDVV
     QERLERDYDL DLIMTAPSVD YEIIMTDGTE KTIDNPADMP EVSEIKEIRE PYVKASIMVP
     NDYVGPVMEL SQRKRGEFVT MDYLDKYRVN VIYNLPLSEI IYDFFDDLKS STKGYASLDY
     EITGYRQSDL VKMDILLNGD PVDALSTIVH KDFAYERGKA IVARLKTTIP RQQFEIPIQA
     AIGNKVIARS TVKAYRKNVL AKCYGGDITR KRKLLEKQKA GKKRMKSVGS VEVPQEAFMS
     ILKMNDEESQ GK