SSRP_RHIWR
ID SSRP_RHIWR Reviewed; 160 AA.
AC A5V3L8;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 10-JUL-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=Swit_0516;
OS Rhizorhabdus wittichii (strain DSM 6014 / CCUG 31198 / JCM 15750 / NBRC
OS 105917 / EY 4224 / RW1) (Sphingomonas wittichii).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Sphingomonadales;
OC Sphingomonadaceae; Rhizorhabdus.
OX NCBI_TaxID=392499;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 6014 / CCUG 31198 / JCM 15750 / NBRC 105917 / EY 4224 / RW1;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA Tice H., Pitluck S., Saunders E., Brettin T., Bruce D., Detter J.C.,
RA Han C., Tapia R., Gilna P., Schmutz J., Larimer F., Land M., Hauser L.,
RA Kyrpides N., Kim E., Halden R.U., Miller T.R., Salzberg S.L., Eisen J.A.,
RA Richardson P.;
RT "Complete sequence of chromosome of Sphingomonas wittichii RW1.";
RL Submitted (MAY-2007) to the EMBL/GenBank/DDBJ databases.
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; CP000699; ABQ66884.1; -; Genomic_DNA.
DR RefSeq; WP_011951364.1; NC_009511.1.
DR AlphaFoldDB; A5V3L8; -.
DR SMR; A5V3L8; -.
DR STRING; 392499.Swit_0516; -.
DR EnsemblBacteria; ABQ66884; ABQ66884; Swit_0516.
DR KEGG; swi:Swit_0516; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_0_1_5; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000001989; 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..160
FT /note="SsrA-binding protein"
FT /id="PRO_1000002154"
FT REGION 133..160
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 160 AA; 18739 MW; 418E5F23ABD3F686 CRC64;
MARPRPAEFE KKKVVAENRR ARFDYFLEQF FEAGIALTGT EVKSLRFGEG SIAESYAEVK
DDQVWLVNSN VPEFSHGNRF NHEPKRPRKL LLHAREIDKM RNGVSREGMT LIPLSIYFNG
RGRAKVELAL AKGKKLHDKR DTEKERDWKR EQQRLLRDRG