SSRP_CUPNH
ID SSRP_CUPNH Reviewed; 150 AA.
AC Q0KA36;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 03-OCT-2006, sequence version 1.
DT 25-MAY-2022, entry version 88.
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=H16_A2035;
OS Cupriavidus necator (strain ATCC 17699 / DSM 428 / KCTC 22496 / NCIMB 10442
OS / H16 / Stanier 337) (Ralstonia eutropha).
OC Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC Burkholderiaceae; Cupriavidus.
OX NCBI_TaxID=381666;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 17699 / DSM 428 / KCTC 22496 / NCIMB 10442 / H16 / Stanier 337;
RX PubMed=16964242; DOI=10.1038/nbt1244;
RA Pohlmann A., Fricke W.F., Reinecke F., Kusian B., Liesegang H., Cramm R.,
RA Eitinger T., Ewering C., Poetter M., Schwartz E., Strittmatter A., Voss I.,
RA Gottschalk G., Steinbuechel A., Friedrich B., Bowien B.;
RT "Genome sequence of the bioplastic-producing 'Knallgas' bacterium Ralstonia
RT eutropha H16.";
RL Nat. Biotechnol. 24:1257-1262(2006).
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; AM260479; CAJ93135.1; -; Genomic_DNA.
DR RefSeq; WP_010809581.1; NZ_CP039287.1.
DR AlphaFoldDB; Q0KA36; -.
DR SMR; Q0KA36; -.
DR STRING; 381666.H16_A2035; -.
DR EnsemblBacteria; CAJ93135; CAJ93135; H16_A2035.
DR GeneID; 57644158; -.
DR KEGG; reh:H16_A2035; -.
DR eggNOG; COG0691; Bacteria.
DR HOGENOM; CLU_108953_3_0_4; -.
DR OMA; WTNHSAR; -.
DR OrthoDB; 1720952at2; -.
DR Proteomes; UP000008210; Chromosome 1.
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..150
FT /note="SsrA-binding protein"
FT /id="PRO_1000002120"
FT REGION 127..150
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 150 AA; 17330 MW; 8C179BB2092295D7 CRC64;
MTIADNKKAF FDYFIEERYE AGIVLEGWEV KAIRAGRVQI KEGYVVVRDA EMFLIGAHIS
PLQSASTHVN PDPVRTRKLL LKADEIKKLI GKVEQRGYTL VPLNLHYTRG RVKCEIGLAK
GKKQFDKRET EKQRDWQREK ARIMKGDAKD
