ID   MTRB_BACPU              Reviewed;          76 AA.
AC   P48064;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   04-NOV-2026, entry version 97.
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;
OS   Bacillus pumilus (Bacillus mesentericus).
OC   Bacteria; Bacillati; Bacillota; Bacilli; Caryophanales; Bacillaceae;
OC   Bacillus.
OX   NCBI_TaxID=1408;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7836324; DOI=10.1128/jb.177.3.839-842.1995;
RA   Hoffman R.J., Gollnick P.;
RT   "The mtrB gene of Bacillus pumilus encodes a protein with sequence and
RT   functional homology to the trp RNA-binding attenuation protein (TRAP) of
RT   Bacillus subtilis.";
RL   J. Bacteriol. 177:839-842(1995).
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.
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; L37879; AAA67544.1; -; Genomic_DNA.
DR   PIR; I39905; I39905.
DR   RefSeq; WP_008344541.1; NZ_CANLYP010000001.1.
DR   AlphaFoldDB; P48064; -.
DR   SMR; P48064; -.
DR   GeneID; 305317628; -.
DR   GeneID; 66363592; -.
DR   OMA; AEIYTKH; -.
DR   OrthoDB; 2111980at2; -.
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 DNA-templated transcription; IEA:InterPro.
DR   Gene3D; 2.60.40.50; TRAP-like; 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   NCBIfam; NF009724; mtrB; 1.
DR   Pfam; PF02081; TrpBP; 1.
DR   PRINTS; PR00687; TRPRNAAP.
DR   SUPFAM; SSF51219; TRAP-like; 1.
PE   3: Inferred from homology;
KW   RNA-binding; Transcription; Transcription regulation.
FT   CHAIN           1..76
FT                   /note="Transcription attenuation protein MtrB"
FT                   /id="PRO_0000206026"
SQ   SEQUENCE   76 AA;  8301 MW;  22184B2351DA151D CRC64;
     MSENKASDFV VIKAIDNGVN VIGLTRGSDT RFHHSEKLDK GEVIIAQFTE HTSAIKVRGD
     AVIQTSFGEI QSEAKK
//