SSRP_PELTS
ID SSRP_PELTS Reviewed; 153 AA.
AC A5CYM8;
DT 29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT 12-JUN-2007, sequence version 1.
DT 03-AUG-2022, entry version 82.
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=PTH_2712;
OS Pelotomaculum thermopropionicum (strain DSM 13744 / JCM 10971 / SI).
OC Bacteria; Firmicutes; Clostridia; Eubacteriales; Desulfotomaculaceae;
OC Pelotomaculum.
OX NCBI_TaxID=370438;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 13744 / JCM 10971 / SI;
RX PubMed=18218977; DOI=10.1101/gr.7136508;
RA Kosaka T., Kato S., Shimoyama T., Ishii S., Abe T., Watanabe K.;
RT "The genome of Pelotomaculum thermopropionicum reveals niche-associated
RT evolution in anaerobic microbiota.";
RL Genome Res. 18:442-448(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; AP009389; BAF60893.1; -; Genomic_DNA.
DR AlphaFoldDB; A5CYM8; -.
DR SMR; A5CYM8; -.
DR STRING; 370438.PTH_2712; -.
DR EnsemblBacteria; BAF60893; BAF60893; PTH_2712.
DR KEGG; pth:PTH_2712; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_1_9; -.
DR OMA; WTNHSAR; -.
DR Proteomes; UP000006556; 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..153
FT /note="SsrA-binding protein"
FT /id="PRO_0000331073"
SQ SEQUENCE 153 AA; 17912 MW; 86A5CDFA0EB85A79 CRC64;
MAVKVVTENR RARHEYHILE TFEAGLALRG TEVKSLRAGK ASLQDSFARV ENGELLLYNM
HISPYEQGNQ FNHEPKRTRR LLMHKYEILR LMGKTREKGL ALIPLKVYFK NGLAKIELAL
AKGKKIYDRR EDIASRDARR EIDRAIKERM RLH