SSRP_OLEA2
ID SSRP_OLEA2 Reviewed; 155 AA.
AC Q313K7;
DT 29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT 06-DEC-2005, sequence version 1.
DT 25-MAY-2022, entry version 93.
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=Dde_1088;
OS Oleidesulfovibrio alaskensis (strain ATCC BAA-1058 / DSM 17464 / G20)
OS (Desulfovibrio alaskensis).
OC Bacteria; Proteobacteria; Deltaproteobacteria; Desulfovibrionales;
OC Desulfovibrionaceae; Oleidesulfovibrio.
OX NCBI_TaxID=207559;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-1058 / DSM 17464 / G20;
RX PubMed=21685289; DOI=10.1128/jb.05400-11;
RA Hauser L.J., Land M.L., Brown S.D., Larimer F., Keller K.L.,
RA Rapp-Giles B.J., Price M.N., Lin M., Bruce D.C., Detter J.C., Tapia R.,
RA Han C.S., Goodwin L.A., Cheng J.F., Pitluck S., Copeland A., Lucas S.,
RA Nolan M., Lapidus A.L., Palumbo A.V., Wall J.D.;
RT "Complete genome sequence and updated annotation of Desulfovibrio
RT alaskensis G20.";
RL J. Bacteriol. 193:4268-4269(2011).
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; CP000112; ABB37889.1; -; Genomic_DNA.
DR RefSeq; WP_011367119.1; NC_007519.1.
DR AlphaFoldDB; Q313K7; -.
DR SMR; Q313K7; -.
DR STRING; 207559.Dde_1088; -.
DR EnsemblBacteria; ABB37889; ABB37889; Dde_1088.
DR KEGG; dde:Dde_1088; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_1_7; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000002710; 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..155
FT /note="SsrA-binding protein"
FT /id="PRO_0000331043"
FT REGION 135..155
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 155 AA; 17788 MW; 90C2BD1C9D8F9BF5 CRC64;
MTKKKSSGGA LIAQNKKARH LYELLEFFEA GIALAGTEVK SLRAGQVSFT DSYVTIHNNE
AWIVGMHIAP YANAGYVQHD PDRDRKLLLH AREIDTLRAR VEQKGLTVVP VKLYFKNSRV
KLEIAVGRGK KLHDKRQDIK QRDVERETRR EIMRH
