ID   SSRP_MYCAP              Reviewed;         147 AA.
AC   A5IZI0;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   26-JUN-2007, sequence version 1.
DT   25-MAY-2022, entry version 80.
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=MAG7390;
OS   Mycoplasmopsis agalactiae (strain NCTC 10123 / CIP 59.7 / PG2) (Mycoplasma
OS   agalactiae).
OC   Bacteria; Tenericutes; Mollicutes; Mycoplasmataceae; Mycoplasmopsis.
OX   NCBI_TaxID=347257;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NCTC 10123 / CIP 59.7 / PG2;
RX   PubMed=17511520; DOI=10.1371/journal.pgen.0030075;
RA   Sirand-Pugnet P., Lartigue C., Marenda M., Jacob D., Barre A., Barbe V.,
RA   Schenowitz C., Mangenot S., Couloux A., Segurens B., de Daruvar A.,
RA   Blanchard A., Citti C.;
RT   "Being pathogenic, plastic, and sexual while living with a nearly minimal
RT   bacterial genome.";
RL   PLoS Genet. 3:744-758(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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CU179680; CAL59439.1; -; Genomic_DNA.
DR   RefSeq; WP_011949891.1; NC_009497.1.
DR   AlphaFoldDB; A5IZI0; -.
DR   SMR; A5IZI0; -.
DR   STRING; 347257.MAG7390; -.
DR   EnsemblBacteria; CAL59439; CAL59439; MAG7390.
DR   KEGG; maa:MAG7390; -.
DR   HOGENOM; CLU_108953_3_1_14; -.
DR   OMA; WTNHSAR; -.
DR   Proteomes; UP000007065; 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..147
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000090167"
SQ   SEQUENCE   147 AA;  17364 MW;  30C46F09C28A3D26 CRC64;
     MKVISENRKG LYGYKIIEKH EAGISLLGWE VKSARAQTVN LTNSYIFFKK GELFLCNANF
     AKYMLLKVEE DRDRKLLMHK KEIIRLKNKL DRLSSTTIKP TKIYFNNKSK IKVEIALVQG
     MNRADKREDL KKRDNEKYMQ KVKSNYL