SSRP_ANOFW
ID SSRP_ANOFW Reviewed; 154 AA.
AC B7GLX3;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 10-FEB-2009, sequence version 1.
DT 25-MAY-2022, entry version 68.
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=Aflv_2497;
OS Anoxybacillus flavithermus (strain DSM 21510 / WK1).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Anoxybacillus.
OX NCBI_TaxID=491915;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 21510 / WK1;
RX PubMed=19014707; DOI=10.1186/gb-2008-9-11-r161;
RA Saw J.H., Mountain B.W., Feng L., Omelchenko M.V., Hou S., Saito J.A.,
RA Stott M.B., Li D., Zhao G., Wu J., Galperin M.Y., Koonin E.V.,
RA Makarova K.S., Wolf Y.I., Rigden D.J., Dunfield P.F., Wang L., Alam M.;
RT "Encapsulated in silica: genome, proteome and physiology of the
RT thermophilic bacterium Anoxybacillus flavithermus WK1.";
RL Genome Biol. 9:R161.1-R161.16(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; CP000922; ACJ34852.1; -; Genomic_DNA.
DR RefSeq; WP_004892472.1; NC_011567.1.
DR AlphaFoldDB; B7GLX3; -.
DR SMR; B7GLX3; -.
DR STRING; 491915.Aflv_2497; -.
DR EnsemblBacteria; ACJ34852; ACJ34852; Aflv_2497.
DR KEGG; afl:Aflv_2497; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_0_9; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000000742; 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..154
FT /note="SsrA-binding protein"
FT /id="PRO_1000116411"
FT REGION 126..154
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 154 AA; 17998 MW; 49FF421E76857641 CRC64;
MPKGEGKLIA QNKKAHHDYF IEETYEAGLV LQGTEIKSIR AGKVNLKDSF AKVEKGEVFL
HNMHISPYEQ GNRYNHDPLR TRKLLLHRRE ISKLIGYTKE QGYTLVPLKL YIKNGFAKLL
LGVGKGKKKY DKREDMKKKE AQREVERAFR ERQK
