SSRP_ORITB
ID SSRP_ORITB Reviewed; 153 AA.
AC A5CCM6;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 12-JUN-2007, sequence version 1.
DT 25-MAY-2022, entry version 81.
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=OTBS_0392;
OS Orientia tsutsugamushi (strain Boryong) (Rickettsia tsutsugamushi).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC Rickettsiaceae; Rickettsieae; Orientia.
OX NCBI_TaxID=357244;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Boryong;
RX PubMed=17483455; DOI=10.1073/pnas.0611553104;
RA Cho N.-H., Kim H.-R., Lee J.-H., Kim S.-Y., Kim J., Cha S., Kim S.-Y.,
RA Darby A.C., Fuxelius H.-H., Yin J., Kim J.H., Kim J., Lee S.J., Koh Y.-S.,
RA Jang W.-J., Park K.-H., Andersson S.G.E., Choi M.-S., Kim I.-S.;
RT "The Orientia tsutsugamushi genome reveals massive proliferation of
RT conjugative type IV secretion system and host-cell interaction genes.";
RL Proc. Natl. Acad. Sci. U.S.A. 104:7981-7986(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}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AM494475; CAM79458.1; -; Genomic_DNA.
DR RefSeq; WP_011944452.1; NC_009488.1.
DR AlphaFoldDB; A5CCM6; -.
DR SMR; A5CCM6; -.
DR EnsemblBacteria; CAM79458; CAM79458; OTBS_0392.
DR KEGG; ots:OTBS_0392; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_0_5; -.
DR OMA; WTNHSAR; -.
DR Proteomes; UP000001565; 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_1000002098"
SQ SEQUENCE 153 AA; 17931 MW; 305532DFB7F2CCF9 CRC64;
MENYCKIVAQ NRKAKFNYFI QDKMEAGIVL QGSELKSIRS GKVSIEDSYA AESSNEIFLY
NSYIGEYKQA NRFNHVPRRV RKLLLHRKEI QKIIGKLSVQ GCTLVALSIY FNSKNKVKVE
LGLAKGKKQY DKRYAIKEQE WKKQQARIMR NKF
