ID   SSRP_AERHH              Reviewed;         162 AA.
AC   A0KI80;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-DEC-2006, sequence version 1.
DT   03-AUG-2022, entry version 91.
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=AHA_1443;
OS   Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / DSM 30187 / BCRC
OS   13018 / CCUG 14551 / JCM 1027 / KCTC 2358 / NCIMB 9240 / NCTC 8049).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Aeromonadales;
OC   Aeromonadaceae; Aeromonas.
OX   NCBI_TaxID=380703;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 7966 / DSM 30187 / BCRC 13018 / CCUG 14551 / JCM 1027 / KCTC
RC   2358 / NCIMB 9240 / NCTC 8049;
RX   PubMed=16980456; DOI=10.1128/jb.00621-06;
RA   Seshadri R., Joseph S.W., Chopra A.K., Sha J., Shaw J., Graf J., Haft D.H.,
RA   Wu M., Ren Q., Rosovitz M.J., Madupu R., Tallon L., Kim M., Jin S.,
RA   Vuong H., Stine O.C., Ali A., Horneman A.J., Heidelberg J.F.;
RT   "Genome sequence of Aeromonas hydrophila ATCC 7966T: jack of all trades.";
RL   J. Bacteriol. 188:8272-8282(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; CP000462; ABK37313.1; -; Genomic_DNA.
DR   RefSeq; WP_011705343.1; NC_008570.1.
DR   RefSeq; YP_855981.1; NC_008570.1.
DR   AlphaFoldDB; A0KI80; -.
DR   SMR; A0KI80; -.
DR   STRING; 380703.AHA_1443; -.
DR   EnsemblBacteria; ABK37313; ABK37313; AHA_1443.
DR   GeneID; 64357908; -.
DR   KEGG; aha:AHA_1443; -.
DR   PATRIC; fig|380703.7.peg.1450; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_3_0_6; -.
DR   OMA; WTNHSAR; -.
DR   Proteomes; UP000000756; 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..162
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_0000331015"
FT   REGION          137..162
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        137..155
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   162 AA;  18604 MW;  9A2BB0DF1040D115 CRC64;
     MSKKNSKNKA GSNTIALNRS ARHEYFIEEK IEAGLSLQGW EVKSLRAGKA NISEAYVIFR
     DGEAYLFGSS FLPLQAASSH VVCDPTRTRK LLLSRRELDK LESLIARQGY TVVPLALYWK
     QCWVKVEIGL VKGKKEHDKR EDTKAREWDR EKARIMKNKH RG