ID   SSRP_CELJU              Reviewed;         159 AA.
AC   B3PF48;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 1.
DT   25-MAY-2022, entry version 73.
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=CJA_3362;
OS   Cellvibrio japonicus (strain Ueda107) (Pseudomonas fluorescens subsp.
OS   cellulosa).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Cellvibrio.
OX   NCBI_TaxID=498211;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Ueda107;
RX   PubMed=18556790; DOI=10.1128/jb.01701-07;
RA   DeBoy R.T., Mongodin E.F., Fouts D.E., Tailford L.E., Khouri H.,
RA   Emerson J.B., Mohamoud Y., Watkins K., Henrissat B., Gilbert H.J.,
RA   Nelson K.E.;
RT   "Insights into plant cell wall degradation from the genome sequence of the
RT   soil bacterium Cellvibrio japonicus.";
RL   J. Bacteriol. 190:5455-5463(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; CP000934; ACE82808.1; -; Genomic_DNA.
DR   RefSeq; WP_012488938.1; NC_010995.1.
DR   AlphaFoldDB; B3PF48; -.
DR   SMR; B3PF48; -.
DR   STRING; 498211.CJA_3362; -.
DR   EnsemblBacteria; ACE82808; ACE82808; CJA_3362.
DR   KEGG; cja:CJA_3362; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_0_6; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001036; 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..159
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000116416"
FT   REGION          137..159
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   159 AA;  18688 MW;  0B072B94FFFB0AF6 CRC64;
     MAKKNQKSGS NTIALNKKAK FDYELHERFE AGLALTGWEV KSLRAGKGNI TDCYVIFKNN
     EAWLQACQIQ PLLSASTHFV TDPFRNRKLL LNRREINRLQ EAVEQKGYTV VPIALYWKAH
     MVKCEIAIAK GKQLHDKRQT EKERDWEREK QRLFQRDQR