ID   MTRB_OCEIH              Reviewed;          74 AA.
AC   Q8EQB3;
DT   25-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2003, sequence version 1.
DT   25-MAY-2022, entry version 104.
DE   RecName: Full=Transcription attenuation protein MtrB;
DE   AltName: Full=Trp RNA-binding attenuation protein;
DE            Short=TRAP;
DE   AltName: Full=Tryptophan RNA-binding attenuator protein;
GN   Name=mtrB; OrderedLocusNames=OB1791;
OS   Oceanobacillus iheyensis (strain DSM 14371 / CIP 107618 / JCM 11309 / KCTC
OS   3954 / HTE831).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Oceanobacillus.
OX   NCBI_TaxID=221109;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 14371 / CIP 107618 / JCM 11309 / KCTC 3954 / HTE831;
RX   PubMed=12235376; DOI=10.1093/nar/gkf526;
RA   Takami H., Takaki Y., Uchiyama I.;
RT   "Genome sequence of Oceanobacillus iheyensis isolated from the Iheya Ridge
RT   and its unexpected adaptive capabilities to extreme environments.";
RL   Nucleic Acids Res. 30:3927-3935(2002).
CC   -!- FUNCTION: Required for transcription attenuation control in the Trp
CC       operon. This trans-acting factor seems to recognize a 10 bases
CC       nucleotide sequence in the Trp leader transcript causing transcription
CC       termination. Binds the leader RNA only in presence of L-tryptophan (By
CC       similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Oligomer of 11 identical subunits arranged in doughnut-like
CC       structure. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the MtrB family. {ECO:0000305}.
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DR   EMBL; BA000028; BAC13747.1; -; Genomic_DNA.
DR   RefSeq; WP_011066190.1; NC_004193.1.
DR   AlphaFoldDB; Q8EQB3; -.
DR   SMR; Q8EQB3; -.
DR   STRING; 221109.22777475; -.
DR   EnsemblBacteria; BAC13747; BAC13747; BAC13747.
DR   KEGG; oih:OB1791; -.
DR   eggNOG; ENOG5032Z9Y; Bacteria.
DR   HOGENOM; CLU_180875_0_0_9; -.
DR   OMA; KDTKFHH; -.
DR   OrthoDB; 1974796at2; -.
DR   Proteomes; UP000000822; Chromosome.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006353; P:DNA-templated transcription, termination; IEA:InterPro.
DR   GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:InterPro.
DR   Gene3D; 2.60.40.50; -; 1.
DR   HAMAP; MF_00798; Trp_attenuator; 1.
DR   InterPro; IPR000824; MtrB.
DR   InterPro; IPR016031; Trp_RNA-bd_attenuator-like_dom.
DR   InterPro; IPR023558; Trp_RNA-bd_attenuator_dom.
DR   Pfam; PF02081; TrpBP; 1.
DR   PRINTS; PR00687; TRPRNAAP.
DR   SUPFAM; SSF51219; SSF51219; 1.
PE   3: Inferred from homology;
KW   Reference proteome; RNA-binding; Transcription; Transcription regulation.
FT   CHAIN           1..74
FT                   /note="Transcription attenuation protein MtrB"
FT                   /id="PRO_0000206029"
SQ   SEQUENCE   74 AA;  8368 MW;  CD46145BE703C8F8 CRC64;
     MTDRTDKAEY FIIKALENGV NVMGLTRGHD TRFHHTEKLD QGEVMIAQFT EHTSAIKVRG
     KALIQTSHGE ITNE