SSRP_SODGM
ID SSRP_SODGM Reviewed; 160 AA.
AC Q2NRZ6;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 07-FEB-2006, sequence version 1.
DT 03-AUG-2022, entry version 91.
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=SG1804;
OS Sodalis glossinidius (strain morsitans).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Bruguierivoracaceae; Sodalis.
OX NCBI_TaxID=343509;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=morsitans;
RX PubMed=16365377; DOI=10.1101/gr.4106106;
RA Toh H., Weiss B.L., Perkin S.A.H., Yamashita A., Oshima K., Hattori M.,
RA Aksoy S.;
RT "Massive genome erosion and functional adaptations provide insights into
RT the symbiotic lifestyle of Sodalis glossinidius in the tsetse host.";
RL Genome Res. 16:149-156(2006).
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; AP008232; BAE75079.1; -; Genomic_DNA.
DR RefSeq; WP_011411628.1; NZ_LN854557.1.
DR AlphaFoldDB; Q2NRZ6; -.
DR SMR; Q2NRZ6; -.
DR STRING; 343509.SG1804; -.
DR EnsemblBacteria; BAE75079; BAE75079; SG1804.
DR KEGG; sgl:SG1804; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_3_0_6; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR BioCyc; SGLO343509:SGP1_RS16310-MON; -.
DR Proteomes; UP000001932; 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..160
FT /note="SsrA-binding protein"
FT /id="PRO_1000002152"
SQ SEQUENCE 160 AA; 18415 MW; 04EDF93A5F1B3242 CRC64;
MTKKKEHKPG SATIAQNKRA RHEYFIEQEF EAGLSLQGWE VKSLRAGKAN IGDSYVLLKD
GEAYLFGATF QPLTVASSHV VCDPMRTRKL LLNKRELDSL FGRVNREGYT VVALSLYWKN
AWVKVKIGVA KGKKEYDKRT DIKEREWQLD KSRIMKHASR