ID   SSRP_CORK4              Reviewed;         183 AA.
AC   C4LK22;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   07-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 68.
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=ckrop_1439;
OS   Corynebacterium kroppenstedtii (strain DSM 44385 / JCM 11950 / CIP 105744 /
OS   CCUG 35717).
OC   Bacteria; Actinobacteria; Corynebacteriales; Corynebacteriaceae;
OC   Corynebacterium.
OX   NCBI_TaxID=645127;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 44385 / JCM 11950 / CIP 105744 / CCUG 35717;
RX   PubMed=18430482; DOI=10.1016/j.jbiotec.2008.03.004;
RA   Tauch A., Schneider J., Szczepanowski R., Tilker A., Viehoever P.,
RA   Gartemann K.-H., Arnold W., Blom J., Brinkrolf K., Brune I., Goetker S.,
RA   Weisshaar B., Goesmann A., Droege M., Puehler A.;
RT   "Ultrafast pyrosequencing of Corynebacterium kroppenstedtii DSM44385
RT   revealed insights into the physiology of a lipophilic corynebacterium that
RT   lacks mycolic acids.";
RL   J. Biotechnol. 136:22-30(2008).
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; CP001620; ACR18177.1; -; Genomic_DNA.
DR   RefSeq; WP_012732064.1; NC_012704.1.
DR   AlphaFoldDB; C4LK22; -.
DR   SMR; C4LK22; -.
DR   STRING; 645127.ckrop_1439; -.
DR   EnsemblBacteria; ACR18177; ACR18177; ckrop_1439.
DR   KEGG; ckp:ckrop_1439; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_2_1_11; -.
DR   OMA; WTNHSAR; -.
DR   OrthoDB; 1720952at2; -.
DR   Proteomes; UP000001473; 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..183
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000201929"
FT   REGION          1..27
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        1..16
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   183 AA;  20803 MW;  1518A686D90AAFFA CRC64;
     MAKKATLVDH GAAKGKKKAQ SKVSKKNANK RLVVATNRRA RHDYTILDTW EAGIQLVGTE
     VKSLREGKAS LIDSFATIDD GEVWLRHLHI PEYSKGHWTN HSPRRTRKLL LHRNEIDSIM
     GKVRDGNNTL IPLSLYFSDG KLKVELALGR GKQDYDRRQD IKRRTEEREA TRALGRRVKG
     LTG