SSRP_MYCGI
ID SSRP_MYCGI Reviewed; 165 AA.
AC A4TDF4;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 15-MAY-2007, sequence version 1.
DT 25-MAY-2022, entry version 89.
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=Mflv_4446;
OS Mycolicibacterium gilvum (strain PYR-GCK) (Mycobacterium gilvum (strain
OS PYR-GCK)).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycolicibacterium.
OX NCBI_TaxID=350054;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PYR-GCK;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Mikhailova N., Miller C., Richardson P.;
RT "Complete sequence of chromosome of Mycobacterium gilvum PYR-GCK.";
RL Submitted (APR-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; CP000656; ABP46915.1; -; Genomic_DNA.
DR RefSeq; WP_011895289.1; NC_009338.1.
DR AlphaFoldDB; A4TDF4; -.
DR SMR; A4TDF4; -.
DR STRING; 350054.Mflv_4446; -.
DR EnsemblBacteria; ABP46915; ABP46915; Mflv_4446.
DR KEGG; mgi:Mflv_4446; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_2_1_11; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
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..165
FT /note="SsrA-binding protein"
FT /id="PRO_1000074357"
FT REGION 135..165
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 135..158
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 165 AA; 18694 MW; 4902C5CFB23C0325 CRC64;
MAKKPKSVKD TNNMVVASNR KARHNYSILE TYEAGVALVG TEVKSLRDGT ASLADAFATV
DDGEIWLRNL HIPEYHHGSW TNHAPRRNRK LLMHRREIDN LVGKIRDGNL TLVPLSLYFT
GGKVKVELAL ARGKQAHDKR QDMARRDAQR EVTRELGRRV KGMTN
