ID   SSRP_TERTT              Reviewed;         158 AA.
AC   C5BQH7;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 64.
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=TERTU_3305;
OS   Teredinibacter turnerae (strain ATCC 39867 / T7901).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Teredinibacter.
OX   NCBI_TaxID=377629;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 39867 / T7901;
RX   PubMed=19568419; DOI=10.1371/journal.pone.0006085;
RA   Yang J.C., Madupu R., Durkin A.S., Ekborg N.A., Pedamallu C.S.,
RA   Hostetler J.B., Radune D., Toms B.S., Henrissat B., Coutinho P.M.,
RA   Schwarz S., Field L., Trindade-Silva A.E., Soares C.A.G., Elshahawi S.,
RA   Hanora A., Schmidt E.W., Haygood M.G., Posfai J., Benner J., Madinger C.,
RA   Nove J., Anton B., Chaudhary K., Foster J., Holman A., Kumar S.,
RA   Lessard P.A., Luyten Y.A., Slatko B., Wood N., Wu B., Teplitski M.,
RA   Mougous J.D., Ward N., Eisen J.A., Badger J.H., Distel D.L.;
RT   "The complete genome of Teredinibacter turnerae T7901: an intracellular
RT   endosymbiont of marine wood-boring bivalves (shipworms).";
RL   PLoS ONE 4:E6085-E6085(2009).
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; CP001614; ACR13568.1; -; Genomic_DNA.
DR   RefSeq; WP_015819682.1; NC_012997.1.
DR   AlphaFoldDB; C5BQH7; -.
DR   SMR; C5BQH7; -.
DR   STRING; 377629.TERTU_3305; -.
DR   EnsemblBacteria; ACR13568; ACR13568; TERTU_3305.
DR   KEGG; ttu:TERTU_3305; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_0_6; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000009080; 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..158
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000201943"
FT   REGION          131..158
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        131..149
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   158 AA;  18268 MW;  32AF7009F9753E06 CRC64;
     MAKKKTQNSN TIALNKKARH DYFIEERFEA GVSLAGWEVK ALRAGKGQLT DSYVIFKNGE
     AWLLGAQIQP LPQASTHFVT DPTRTRKLLL HRKELTKLKE ATEQKGHTVV ATALYWKHHL
     VKCEIATAKG KQLHDKRQTE KERDWNKQKQ RILQTNQR