ID   SSRP_ALIB4              Reviewed;         158 AA.
AC   A8EWH6;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, 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=Abu_2082;
OS   Aliarcobacter butzleri (strain RM4018) (Arcobacter butzleri).
OC   Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC   Arcobacteraceae; Aliarcobacter.
OX   NCBI_TaxID=367737;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RM4018;
RX   PubMed=18159241; DOI=10.1371/journal.pone.0001358;
RA   Miller W.G., Parker C.T., Rubenfield M., Mendz G.L., Woesten M.M.S.M.,
RA   Ussery D.W., Stolz J.F., Binnewies T.T., Hallin P.F., Wang G., Malek J.A.,
RA   Rogosin A., Stanker L.H., Mandrell R.E.;
RT   "The complete genome sequence and analysis of the Epsilonproteobacterium
RT   Arcobacter butzleri.";
RL   PLoS ONE 2:E1358-E1358(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; CP000361; ABV68299.1; -; Genomic_DNA.
DR   RefSeq; WP_012147958.1; NC_009850.1.
DR   AlphaFoldDB; A8EWH6; -.
DR   SMR; A8EWH6; -.
DR   STRING; 367737.Abu_2082; -.
DR   EnsemblBacteria; ABV68299; ABV68299; Abu_2082.
DR   GeneID; 56464215; -.
DR   KEGG; abu:Abu_2082; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_1_7; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001136; 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_0000331023"
SQ   SEQUENCE   158 AA;  18284 MW;  A521B5966922FE08 CRC64;
     MANKKDTKKN LVFKNKKAFH DFTILETLEA GIVLEGSEVK AIREGRVNLK DSFVRIIKGE
     VFLLNAHISH LSTTHSTYRP DERRSRKLLL HSKQIDKMYS KVTKDGITLV ALKLYFNDKN
     MIKIEVATAQ GKKLHDKRED LKAKTMKRET EQVLKSFK