ID   LEPA_BUCAP              Reviewed;         601 AA.
AC   Q8K9Q9;
DT   08-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   03-AUG-2022, entry version 120.
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=BUsg_251;
OS   Buchnera aphidicola subsp. Schizaphis graminum (strain Sg).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=198804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Sg;
RX   PubMed=12089438; DOI=10.1126/science.1071278;
RA   Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S.,
RA   Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E.;
RT   "50 million years of genomic stasis in endosymbiotic bacteria.";
RL   Science 296:2376-2379(2002).
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; AE013218; AAM67810.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q8K9Q9; -.
DR   SMR; Q8K9Q9; -.
DR   STRING; 198804.BUsg_251; -.
DR   EnsemblBacteria; AAM67810; AAM67810; BUsg_251.
DR   KEGG; bas:BUsg_251; -.
DR   eggNOG; COG0481; Bacteria.
DR   HOGENOM; CLU_009995_3_3_6; -.
DR   OMA; MVQIAIQ; -.
DR   Proteomes; UP000000416; Chromosome.
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; IPR031157; G_TR_CS.
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   SUPFAM; SSF52540; SSF52540; 1.
DR   SUPFAM; SSF54980; SSF54980; 2.
DR   TIGRFAMs; TIGR01393; lepA; 1.
DR   TIGRFAMs; TIGR00231; small_GTP; 1.
DR   PROSITE; PS00301; G_TR_1; 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..601
FT                   /note="Elongation factor 4"
FT                   /id="PRO_0000176247"
FT   DOMAIN          6..188
FT                   /note="tr-type G"
FT   BINDING         18..23
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00071"
FT   BINDING         135..138
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00071"
SQ   SEQUENCE   601 AA;  67748 MW;  AAEA8B0EF6091ECA CRC64;
     MVKKMKNIRN FSIIAHIDHG KSTLSDRLIQ KCGGLSEREM SDQVLDSMDL EKERGITIKA
     QSVMIDYKDK NGNVFHLNFI DTPGHVNFSY EVSRSLAACE GALLVVDSSQ GVEAQTLANC
     ATALEMKLSI VPVLNKIDLP NSNPEKVARE IKEIIGISAL DAIRCSAKTG QGIEELIEQI
     IKKIPAPDGD EKKPLQALII DSWFDNYLGV VSLIRIKNGI ISKKDKIKVM STGKTYFVDH
     LGIFTPKKIN KNYLKCGEVG WIVCGIKNIS AAPVGDTLTN AKNPAMNMLT GFKKIKPQIY
     AGLFPVTSDQ YEIFRDALGK LSLNDSSLFY EPINSTALGF GFRCGFLGLL HMEIVQARLE
     REYSLNLIST APNVIYQIEF NNGEKIYLDT PSNFPVDNKI RKIKEPIVEC NILLPPKFLG
     PVMKLCIKKR GTEINMIYHE QQVSLKYHIP MNEVVLNFFD ELKSVSSGYA SLEYDFKYFK
     TVKMVRIDIL INSERVDALT VISYYKNAQN RAREIVNKMK ELIPRHQFDI NIQATINNSI
     VARSTIKQLR KNVLAKCYGG DISRKKKLLK KQKDGKKRMK KIGNVNMPKT AFLDILNIHK
     D