ID   SSRP_SOLM1              Reviewed;         154 AA.
AC   C4XJ76;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   03-AUG-2022, entry version 71.
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=DMR_07490;
OS   Solidesulfovibrio magneticus (strain ATCC 700980 / DSM 13731 / RS-1)
OS   (Desulfovibrio magneticus).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfovibrionales;
OC   Desulfovibrionaceae; Solidesulfovibrio.
OX   NCBI_TaxID=573370;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700980 / DSM 13731 / RS-1;
RX   PubMed=19675025; DOI=10.1101/gr.088906.108;
RA   Nakazawa H., Arakaki A., Narita-Yamada S., Yashiro I., Jinno K., Aoki N.,
RA   Tsuruyama A., Okamura Y., Tanikawa S., Fujita N., Takeyama H.,
RA   Matsunaga T.;
RT   "Whole genome sequence of Desulfovibrio magneticus strain RS-1 revealed
RT   common gene clusters in magnetotactic bacteria.";
RL   Genome Res. 19:1801-1808(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}.
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DR   EMBL; AP010904; BAH74240.1; -; Genomic_DNA.
DR   RefSeq; WP_012750315.1; NC_012796.1.
DR   AlphaFoldDB; C4XJ76; -.
DR   SMR; C4XJ76; -.
DR   STRING; 573370.DMR_07490; -.
DR   EnsemblBacteria; BAH74240; BAH74240; DMR_07490.
DR   KEGG; dma:DMR_07490; -.
DR   eggNOG; COG0691; Bacteria.
DR   HOGENOM; CLU_108953_0_0_7; -.
DR   OMA; WTNHSAR; -.
DR   Proteomes; UP000009071; 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; RNA-binding.
FT   CHAIN           1..154
FT                   /note="SsrA-binding protein"
FT                   /id="PRO_1000201931"
SQ   SEQUENCE   154 AA;  17479 MW;  D0CF27AFFE0D5F85 CRC64;
     MAAKESGEKL VALNKKARHL YEFLEKYEAG LVLMGSEVKS LRLGRISFKD GYVKFQDGEA
     FMIGVHIAPY ENAGYAGHEP ERPRKLLLHA AEINAMRVKV EQKGLTVVPV RVYFKNGRAK
     VEIALARGKK VFDRRDDLKS RDLDRDAARE LARH