ID   SSRP_BART1              Reviewed;         158 AA.
AC   A9IRK6;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-FEB-2008, sequence version 1.
DT   25-MAY-2022, entry version 75.
DE   RecName: Full=SsrA-binding protein {ECO:0000255|HAMAP-Rule:MF_00023};
DE   AltName: Full=Small protein B {ECO:0000255|HAMAP-Rule:MF_00023};
GN   Name=smpB {ECO:0000255|HAMAP-Rule:MF_00023}; OrderedLocusNames=BT_0778;
OS   Bartonella tribocorum (strain CIP 105476 / IBS 506).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Bartonellaceae; Bartonella.
OX   NCBI_TaxID=382640;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CIP 105476 / IBS 506;
RX   PubMed=18037886; DOI=10.1038/ng.2007.38;
RA   Saenz H.L., Engel P., Stoeckli M.C., Lanz C., Raddatz G.,
RA   Vayssier-Taussat M., Birtles R., Schuster S.C., Dehio C.;
RT   "Genomic analysis of Bartonella identifies type IV secretion systems as
RT   host adaptability factors.";
RL   Nat. Genet. 39:1469-1476(2007).
CC   -!- FUNCTION: Required for rescue of stalled ribosomes mediated by trans-
CC       translation. Binds to transfer-messenger RNA (tmRNA), required for
CC       stable association of tmRNA with ribosomes. tmRNA and SmpB together
CC       mimic tRNA shape, replacing the anticodon stem-loop with SmpB. tmRNA is
CC       encoded by the ssrA gene; the 2 termini fold to resemble tRNA(Ala) and
CC       it encodes a 'tag peptide', a short internal open reading frame. During
CC       trans-translation Ala-aminoacylated tmRNA acts like a tRNA, entering
CC       the A-site of stalled ribosomes, displacing the stalled mRNA. The
CC       ribosome then switches to translate the ORF on the tmRNA; the nascent
CC       peptide is terminated with the 'tag peptide' encoded by the tmRNA and
CC       targeted for degradation. The ribosome is freed to recommence
CC       translation, which seems to be the essential function of trans-
CC       translation. {ECO:0000255|HAMAP-Rule:MF_00023}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00023}.
CC       Note=The tmRNA-SmpB complex associates with stalled 70S ribosomes.
CC       {ECO:0000255|HAMAP-Rule:MF_00023}.
CC   -!- SIMILARITY: Belongs to the SmpB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00023}.
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DR   EMBL; AM260525; CAK01193.1; -; Genomic_DNA.
DR   RefSeq; WP_012231306.1; NC_010161.1.
DR   AlphaFoldDB; A9IRK6; -.
DR   SMR; A9IRK6; -.
DR   STRING; 382640.BT_0778; -.
DR   EnsemblBacteria; CAK01193; CAK01193; BT_0778.
DR   KEGG; btr:BT_0778; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_0_1_5; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001592; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0070929; P:trans-translation; IEA:UniProtKB-UniRule.
DR   CDD; cd09294; SmpB; 1.
DR   Gene3D; 2.40.280.10; -; 1.
DR   HAMAP; MF_00023; SmpB; 1.
DR   InterPro; IPR023620; SmpB.
DR   InterPro; IPR000037; SsrA-bd_prot.
DR   InterPro; IPR020081; SsrA-bd_prot_CS.
DR   PANTHER; PTHR30308; PTHR30308; 1.
DR   Pfam; PF01668; SmpB; 1.
DR   SUPFAM; SSF74982; SSF74982; 1.
DR   TIGRFAMs; TIGR00086; smpB; 1.
DR   PROSITE; PS01317; SSRP; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; RNA-binding.
FT   CHAIN           1..158
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000074342"
SQ   SEQUENCE   158 AA;  18602 MW;  C6AAD087E928E913 CRC64;
     MNKKKNAPVR KIIADNRKAR FNFEILNNLE AGLVLQGAEV KSLRSNHANI AESYASFENG
     ELWLVNSYIP EYTQANRFNH EPRRLRKLLL SKREMARFFN ATSREGMTLV PLKLYFNERG
     RVKLEIALAR GKKLHDKRET EKKRDWGREK ARLLKRYG