SSRP_MYCS2
ID SSRP_MYCS2 Reviewed; 161 AA.
AC A0QU63; I7G5P6;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 09-JAN-2007, sequence version 1.
DT 25-MAY-2022, entry version 94.
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=MSMEG_2091, MSMEI_2045;
OS Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155) (Mycobacterium
OS smegmatis).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycolicibacterium.
OX NCBI_TaxID=246196;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700084 / mc(2)155;
RA Fleischmann R.D., Dodson R.J., Haft D.H., Merkel J.S., Nelson W.C.,
RA Fraser C.M.;
RL Submitted (OCT-2006) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700084 / mc(2)155;
RX PubMed=17295914; DOI=10.1186/gb-2007-8-2-r20;
RA Deshayes C., Perrodou E., Gallien S., Euphrasie D., Schaeffer C.,
RA Van-Dorsselaer A., Poch O., Lecompte O., Reyrat J.-M.;
RT "Interrupted coding sequences in Mycobacterium smegmatis: authentic
RT mutations or sequencing errors?";
RL Genome Biol. 8:R20.1-R20.9(2007).
RN [3]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], AND IDENTIFICATION BY MASS
RP SPECTROMETRY [LARGE SCALE ANALYSIS].
RC STRAIN=ATCC 700084 / mc(2)155;
RX PubMed=18955433; DOI=10.1101/gr.081901.108;
RA Gallien S., Perrodou E., Carapito C., Deshayes C., Reyrat J.-M.,
RA Van Dorsselaer A., Poch O., Schaeffer C., Lecompte O.;
RT "Ortho-proteogenomics: multiple proteomes investigation through orthology
RT and a new MS-based protocol.";
RL Genome Res. 19:128-135(2009).
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; CP000480; ABK75588.1; -; Genomic_DNA.
DR EMBL; CP001663; AFP38516.1; -; Genomic_DNA.
DR RefSeq; WP_011728144.1; NZ_SIJM01000021.1.
DR RefSeq; YP_886451.1; NC_008596.1.
DR PDB; 5ZEY; EM; 12.50 A; C=1-161.
DR PDBsum; 5ZEY; -.
DR AlphaFoldDB; A0QU63; -.
DR SMR; A0QU63; -.
DR STRING; 246196.MSMEI_2045; -.
DR EnsemblBacteria; ABK75588; ABK75588; MSMEG_2091.
DR EnsemblBacteria; AFP38516; AFP38516; MSMEI_2045.
DR GeneID; 66733518; -.
DR KEGG; msg:MSMEI_2045; -.
DR KEGG; msm:MSMEG_2091; -.
DR PATRIC; fig|246196.19.peg.2068; -.
DR eggNOG; COG0691; Bacteria.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000000757; Chromosome.
DR Proteomes; UP000006158; 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 1: Evidence at protein level;
KW 3D-structure; Cytoplasm; Reference proteome; RNA-binding.
FT CHAIN 1..161
FT /note="SsrA-binding protein"
FT /id="PRO_1000002086"
SQ SEQUENCE 161 AA; 18287 MW; F5D2CA996A7C51E1 CRC64;
MTKKSASSNN KVVATNRKAR HNYTILDTYE AGIVLMGTEV KSLREGQASL ADAFATVDDG
EIWLRNVHIA EYHHGTWTNH APRRNRKLLL HRKQIDNLIG KIRDGNLTLV PLSIYFTDGK
VKVELALARG KQAHDKRQDL ARRDAQREVI RELGRRAKGK I