SSRP_GEOMG
ID SSRP_GEOMG Reviewed; 153 AA.
AC Q39V47;
DT 29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT 29-APR-2008, sequence version 2.
DT 25-MAY-2022, entry version 86.
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=Gmet_1646;
OS Geobacter metallireducens (strain ATCC 53774 / DSM 7210 / GS-15).
OC Bacteria; Proteobacteria; Deltaproteobacteria; Desulfuromonadales;
OC Geobacteraceae; Geobacter.
OX NCBI_TaxID=269799;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 53774 / DSM 7210 / GS-15;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Di Bartolo G., Chain P., Schmutz J.,
RA Larimer F., Land M., Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of Geobacter metallireducens GS-15.";
RL Submitted (OCT-2005) to the EMBL/GenBank/DDBJ databases.
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; CP000148; ABB31877.2; -; Genomic_DNA.
DR RefSeq; WP_004511418.1; NC_007517.1.
DR AlphaFoldDB; Q39V47; -.
DR SMR; Q39V47; -.
DR STRING; 269799.Gmet_1646; -.
DR EnsemblBacteria; ABB31877; ABB31877; Gmet_1646.
DR KEGG; gme:Gmet_1646; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_1_7; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000007073; 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_0000331048"
FT REGION 129..153
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 153 AA; 17925 MW; DC8F23042034C126 CRC64;
MGEKLICNNK KAFHDYFIEE RFEAGMVLKG TEVKSLRMGK ANLNDSFALV RDGEIFLHNL
HINPYDFGNR QNHDPDRLRK LLMHKSEIEK LFGKIREKGY SVVPLRLYFK NGLAKVELGL
AKGKKLYDKR EDMKKKDQSR EMAQALRERS KSH
