ID   SSRP_GLUDA              Reviewed;         154 AA.
AC   A9HIW5; B5ZJW5;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-FEB-2008, sequence version 1.
DT   25-MAY-2022, entry version 92.
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=GDI1880, Gdia_0104;
OS   Gluconacetobacter diazotrophicus (strain ATCC 49037 / DSM 5601 / CCUG 37298
OS   / CIP 103539 / LMG 7603 / PAl5).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales;
OC   Acetobacteraceae; Gluconacetobacter.
OX   NCBI_TaxID=272568;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 49037 / DSM 5601 / CCUG 37298 / CIP 103539 / LMG 7603 / PAl5;
RX   PubMed=19775431; DOI=10.1186/1471-2164-10-450;
RA   Bertalan M., Albano R., de Padua V., Rouws L., Rojas C., Hemerly A.,
RA   Teixeira K., Schwab S., Araujo J., Oliveira A., Franca L., Magalhaes V.,
RA   Alqueres S., Cardoso A., Almeida W., Loureiro M.M., Nogueira E., Cidade D.,
RA   Oliveira D., Simao T., Macedo J., Valadao A., Dreschsel M., Freitas F.,
RA   Vidal M., Guedes H., Rodrigues E., Meneses C., Brioso P., Pozzer L.,
RA   Figueiredo D., Montano H., Junior J., de Souza Filho G.,
RA   Martin Quintana Flores V., Ferreira B., Branco A., Gonzalez P.,
RA   Guillobel H., Lemos M., Seibel L., Macedo J., Alves-Ferreira M.,
RA   Sachetto-Martins G., Coelho A., Santos E., Amaral G., Neves A.,
RA   Pacheco A.B., Carvalho D., Lery L., Bisch P., Rossle S.C., Urmenyi T.,
RA   Rael Pereira A., Silva R., Rondinelli E., von Kruger W., Martins O.,
RA   Baldani J.I., Ferreira P.C.;
RT   "Complete genome sequence of the sugarcane nitrogen-fixing endophyte
RT   Gluconacetobacter diazotrophicus Pal5.";
RL   BMC Genomics 10:450-450(2009).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 49037 / DSM 5601 / CCUG 37298 / CIP 103539 / LMG 7603 / PAl5;
RX   PubMed=21304715; DOI=10.4056/sigs.972221;
RA   Giongo A., Tyler H.L., Zipperer U.N., Triplett E.W.;
RT   "Two genome sequences of the same bacterial strain, Gluconacetobacter
RT   diazotrophicus PAl 5, suggest a new standard in genome sequence
RT   submission.";
RL   Stand. Genomic Sci. 2:309-317(2010).
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   -!- SEQUENCE CAUTION:
CC       Sequence=ACI49904.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; AM889285; CAP55823.1; -; Genomic_DNA.
DR   EMBL; CP001189; ACI49904.1; ALT_INIT; Genomic_DNA.
DR   AlphaFoldDB; A9HIW5; -.
DR   SMR; A9HIW5; -.
DR   STRING; 272568.GDI1880; -.
DR   EnsemblBacteria; ACI49904; ACI49904; Gdia_0104.
DR   EnsemblBacteria; CAP55823; CAP55823; GDI1880.
DR   KEGG; gdi:GDI1880; -.
DR   KEGG; gdj:Gdia_0104; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_0_1_5; -.
DR   OMA; WTNHSAR; -.
DR   Proteomes; UP000000736; Chromosome.
DR   Proteomes; UP000001176; 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..154
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_0000331049"
SQ   SEQUENCE   154 AA;  17299 MW;  B17CB3107C821511 CRC64;
     MISTGIAAQN RKGRFNYTIL ETLEAGMVLK GPEVKSLRLG RATINEAYAG DRDGEIWLFN
     SYIPEYQGGV LSRFETRAPR KLLLHRKQVD KLLGAVARDG VTLVPLDIHF NARGVAKVTL
     GIGEGRKKAD KRQAIADRDW QRDKARLLRN KGRE