ID   SSRP_BORA1              Reviewed;         153 AA.
AC   Q2L136;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   07-MAR-2006, sequence version 1.
DT   25-MAY-2022, entry version 90.
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=BAV1755;
OS   Bordetella avium (strain 197N).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Alcaligenaceae; Bordetella.
OX   NCBI_TaxID=360910;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=197N;
RX   PubMed=16885469; DOI=10.1128/jb.01927-05;
RA   Sebaihia M., Preston A., Maskell D.J., Kuzmiak H., Connell T.D., King N.D.,
RA   Orndorff P.E., Miyamoto D.M., Thomson N.R., Harris D., Goble A., Lord A.,
RA   Murphy L., Quail M.A., Rutter S., Squares R., Squares S., Woodward J.,
RA   Parkhill J., Temple L.M.;
RT   "Comparison of the genome sequence of the poultry pathogen Bordetella avium
RT   with those of B. bronchiseptica, B. pertussis, and B. parapertussis reveals
RT   extensive diversity in surface structures associated with host
RT   interaction.";
RL   J. Bacteriol. 188:6002-6015(2006).
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; AM167904; CAJ49364.1; -; Genomic_DNA.
DR   RefSeq; WP_012417425.1; NC_010645.1.
DR   AlphaFoldDB; Q2L136; -.
DR   SMR; Q2L136; -.
DR   STRING; 360910.BAV1755; -.
DR   EnsemblBacteria; CAJ49364; CAJ49364; BAV1755.
DR   GeneID; 41393607; -.
DR   KEGG; bav:BAV1755; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_0_4; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001977; 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; Reference proteome; RNA-binding.
FT   CHAIN           1..153
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000002003"
FT   REGION          132..153
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   153 AA;  17992 MW;  CB487B8777EEFA0C CRC64;
     MSIIDNRKAS HDYFIEDRYE AGLVLQGWEV KSIRAGRVQL KESYVIVRDG ELFLLGMHVS
     PLPTASTHIH PDAMRTRKLL LKAEEIHKLI GKVEQRGFTL VPLNLHYKNG RVKLDFALGR
     GKKLYDKRDT SREKDWLRER ERVMKHDTRR RSD