SSRP_CAMHC
ID SSRP_CAMHC Reviewed; 153 AA.
AC A7I2C6;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 11-SEP-2007, sequence version 1.
DT 25-MAY-2022, entry version 75.
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};
GN OrderedLocusNames=CHAB381_1111;
OS Campylobacter hominis (strain ATCC BAA-381 / LMG 19568 / NCTC 13146 /
OS CH001A).
OC Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC Campylobacteraceae; Campylobacter.
OX NCBI_TaxID=360107;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-381 / LMG 19568 / NCTC 13146 / CH001A;
RA Fouts D.E., Mongodin E.F., Puiu D., Sebastian Y., Miller W.G.,
RA Mandrell R.E., Nelson K.E.;
RT "Complete genome sequence of Campylobacter hominis ATCC BAA-381, a
RT commensal isolated from the human gastrointestinal tract.";
RL Submitted (JUL-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}.
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; CP000776; ABS52192.1; -; Genomic_DNA.
DR RefSeq; WP_012108966.1; NC_009714.1.
DR AlphaFoldDB; A7I2C6; -.
DR SMR; A7I2C6; -.
DR STRING; 360107.CHAB381_1111; -.
DR EnsemblBacteria; ABS52192; ABS52192; CHAB381_1111.
DR KEGG; cha:CHAB381_1111; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_3_1_7; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000002407; 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_1000002024"
FT REGION 132..153
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 132..146
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 153 AA; 17479 MW; D9B63D2A75D1FB7F CRC64;
MKELTKNKKA WHNFTIIENF EAGIVLKGSE VKALRMGRAN LKDSFCRIIK GELFLLNAHI
SFLENTNAFF RPSENGARKL LMHKKEINRL FGAVSKEGMA IVALSLYLND KNKVKARIAL
AKGKNLHDKR EALKRKEAER EAQSAMKRYA KGY
