ID   SSRP_XANOP              Reviewed;         167 AA.
AC   B2SQV2;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-2008, sequence version 1.
DT   25-MAY-2022, entry version 77.
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=PXO_01177;
OS   Xanthomonas oryzae pv. oryzae (strain PXO99A).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Xanthomonadales;
OC   Xanthomonadaceae; Xanthomonas.
OX   NCBI_TaxID=360094;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PXO99A;
RX   PubMed=18452608; DOI=10.1186/1471-2164-9-204;
RA   Salzberg S.L., Sommer D.D., Schatz M.C., Phillippy A.M., Rabinowicz P.D.,
RA   Tsuge S., Furutani A., Ochiai H., Delcher A.L., Kelley D., Madupu R.,
RA   Puiu D., Radune D., Shumway M., Trapnell C., Aparna G., Jha G., Pandey A.,
RA   Patil P.B., Ishihara H., Meyer D.F., Szurek B., Verdier V., Koebnik R.,
RA   Dow J.M., Ryan R.P., Hirata H., Tsuyumu S., Won Lee S., Seo Y.-S.,
RA   Sriariyanum M., Ronald P.C., Sonti R.V., Van Sluys M.-A., Leach J.E.,
RA   White F.F., Bogdanove A.J.;
RT   "Genome sequence and rapid evolution of the rice pathogen Xanthomonas
RT   oryzae pv. oryzae PXO99A.";
RL   BMC Genomics 9:204-204(2008).
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; CP000967; ACD59513.1; -; Genomic_DNA.
DR   RefSeq; WP_011258734.1; NC_010717.2.
DR   AlphaFoldDB; B2SQV2; -.
DR   SMR; B2SQV2; -.
DR   STRING; 360094.PXO_01177; -.
DR   EnsemblBacteria; ACD59513; ACD59513; PXO_01177.
DR   KEGG; xop:PXO_01177; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_0_6; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001740; 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..167
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000090201"
FT   REGION          139..167
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   167 AA;  19266 MW;  D9E6CF23FF4BC379 CRC64;
     MSKKPTKDKA NGAKATKTIA LNKRARHEYH LEERYEAGLA LQGWEIKAIR AGRANIVDGY
     AYVRSGEIYL IGAQITPLIQ ASTHTVPVER RDRKLLLHRA EIDKVLTRVE REGYTLVPTA
     LYWSSNKVKL EIALAKGKQN HDKRDAAKER DWQRDKQRVM RRHNRDA