ID   SSRP_ANADF              Reviewed;         165 AA.
AC   A7HGZ0;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-SEP-2007, sequence version 1.
DT   03-AUG-2022, entry version 79.
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};
GN   OrderedLocusNames=Anae109_3807;
OS   Anaeromyxobacter sp. (strain Fw109-5).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Myxococcales;
OC   Cystobacterineae; Anaeromyxobacteraceae; Anaeromyxobacter;
OC   unclassified Anaeromyxobacter.
OX   NCBI_TaxID=404589;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Fw109-5;
RX   PubMed=25614562; DOI=10.1128/genomea.01449-14;
RA   Hwang C., Copeland A., Lucas S., Lapidus A., Barry K., Glavina Del Rio T.,
RA   Dalin E., Tice H., Pitluck S., Sims D., Brettin T., Bruce D.C.,
RA   Detter J.C., Han C.S., Schmutz J., Larimer F.W., Land M.L., Hauser L.J.,
RA   Kyrpides N., Lykidis A., Richardson P., Belieav A., Sanford R.A.,
RA   Loeffler F.E., Fields M.W.;
RT   "Complete genome sequence of Anaeromyxobacter sp. Fw109-5, an anaerobic,
RT   metal-reducing bacterium isolated from a contaminated subsurface
RT   environment.";
RL   Genome Announc. 3:0-0(2015).
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; CP000769; ABS27986.1; -; Genomic_DNA.
DR   RefSeq; WP_012098617.1; NC_009675.1.
DR   AlphaFoldDB; A7HGZ0; -.
DR   SMR; A7HGZ0; -.
DR   STRING; 404589.Anae109_3807; -.
DR   EnsemblBacteria; ABS27986; ABS27986; Anae109_3807.
DR   KEGG; afw:Anae109_3807; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_0_1_7; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000006382; 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..165
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_0000331022"
FT   REGION          141..165
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   165 AA;  18875 MW;  68EC0E692039681E CRC64;
     MSAKGAGGAR GRGAEGEKIV ATNRRARFDF TIEDSWEAGL VLTGSEVKSL REGNVNLSDA
     YALPRGDELF LVNCRIGEYK QAAHFGHEPL RDRKLLMNRP ELDRVKGKIE QRGYTLVPLR
     LYFKQGWAKV ELGLAKGRSH EDRRHAIAER ETKREMDREI SRRRR