SSRP_MYCUA
ID SSRP_MYCUA Reviewed; 168 AA.
AC A0PQZ1;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 09-JAN-2007, sequence version 1.
DT 25-MAY-2022, entry version 89.
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=MUL_2407;
OS Mycobacterium ulcerans (strain Agy99).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycobacterium.
OX NCBI_TaxID=362242;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Agy99;
RX PubMed=17210928; DOI=10.1101/gr.5942807;
RA Stinear T.P., Seemann T., Pidot S., Frigui W., Reysset G., Garnier T.,
RA Meurice G., Simon D., Bouchier C., Ma L., Tichit M., Porter J.L., Ryan J.,
RA Johnson P.D.R., Davies J.K., Jenkin G.A., Small P.L.C., Jones L.M.,
RA Tekaia F., Laval F., Daffe M., Parkhill J., Cole S.T.;
RT "Reductive evolution and niche adaptation inferred from the genome of
RT Mycobacterium ulcerans, the causative agent of Buruli ulcer.";
RL Genome Res. 17:192-200(2007).
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; CP000325; ABL04760.1; -; Genomic_DNA.
DR RefSeq; WP_011740375.1; NC_008611.1.
DR AlphaFoldDB; A0PQZ1; -.
DR SMR; A0PQZ1; -.
DR STRING; 362242.MUL_2407; -.
DR EnsemblBacteria; ABL04760; ABL04760; MUL_2407.
DR KEGG; mul:MUL_2407; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_2_1_11; -.
DR OMA; WTNHSAR; -.
DR Proteomes; UP000000765; 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; RNA-binding.
FT CHAIN 1..168
FT /note="SsrA-binding protein"
FT /id="PRO_1000002088"
FT REGION 1..20
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 168 AA; 19136 MW; 5ED43D926F827ECD CRC64;
MAAQSKQAKP SGKQGGKKII ATNRKARHNY SIIEVFEAGV ALQGTEVKSL RERHASLVDA
FATVDDGEVW LRNLHIPEYL HGTWTNHEPR RNRKLLLHRR QIDTLFGKIR EGNFALVPLS
MYFLDGKVKV ELALARGKHA HDKRQDLARR DAQREVIREL GRRAKGMG
