+Open data
-Basic information
Entry | Database: SASBDB / ID: SASDE48 |
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Sample | Toxin GraT
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Function / homology | Toxin HigB-1 / RelE-like toxin of type II toxin-antitoxin system HigB / Toxin-antitoxin system, RelE/ParE toxin domain superfamily / molecular function activator activity / Putative Killer protein Function and homology information |
Biological species | Pseudomonas putida (bacteria) |
Citation | Journal: Nat Commun / Year: 2019 Title: A dual role in regulation and toxicity for the disordered N-terminus of the toxin GraT. Authors: Ariel Talavera / Hedvig Tamman / Andres Ainelo / Albert Konijnenberg / San Hadži / Frank Sobott / Abel Garcia-Pino / Rita Hõrak / Remy Loris / Abstract: Bacterial toxin-antitoxin (TA) modules are tightly regulated to maintain growth in favorable conditions or growth arrest during stress. A typical regulatory strategy involves the antitoxin binding ...Bacterial toxin-antitoxin (TA) modules are tightly regulated to maintain growth in favorable conditions or growth arrest during stress. A typical regulatory strategy involves the antitoxin binding and repressing its own promoter while the toxin often acts as a co-repressor. Here we show that Pseudomonas putida graTA-encoded antitoxin GraA and toxin GraT differ from other TA proteins in the sense that not the antitoxin but the toxin possesses a flexible region. GraA auto-represses the graTA promoter: two GraA dimers bind cooperatively at opposite sides of the operator sequence. Contrary to other TA modules, GraT is a de-repressor of the graTA promoter as its N-terminal disordered segment prevents the binding of the GraTA complex to the operator. Removal of this region restores operator binding and abrogates Gr aT toxicity. GraTA represents a TA module where a flexible region in the toxin rather than in the antitoxin controls operon expression and toxin activity. |
Contact author |
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-Structure visualization
-Downloads & links
-Data source
SASBDB page | SASDE48 |
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-Related structure data
Related structure data | 6f8hC 6f8sC 6fixC C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Models
-Sample
Sample | Name: Toxin GraT / Specimen concentration: 12.5 mg/ml |
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Buffer | Name: 50 mM Tris 250 mM NaCl 2 mM TCEP / pH: 8 |
Entity #1379 | Name: GraT / Type: protein / Description: Putative killer protein, Toxin GraT. / Formula weight: 11.104 / Num. of mol.: 1 / Source: Pseudomonas putida / References: UniProt: Q88MI5 Sequence: MIRSFSCADT EALFTTGKTR RGSDIKSVAE RKLAMLDAAT ELRDLRSPPG NRLESLSGNR ADQHSIRVND QWRLCFTWTE HGPVNVEIVD YENLYFQ |
-Experimental information
Beam | Instrument name: SOLEIL SWING / City: Saint-Aubin / 国: France / Type of source: X-ray synchrotronSynchrotron / Wavelength: 0.103317 Å / Dist. spec. to detc.: 1.499 mm | |||||||||||||||||||||||||||||||||
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Detector | Name: Eiger 4M / Pixsize x: 75 mm | |||||||||||||||||||||||||||||||||
Scan | Title: Toxin GraT / Measurement date: Sep 21, 2018 / Storage temperature: 24.8 °C / Cell temperature: 25 °C / Exposure time: 0.99 sec. / Number of frames: 40 / Unit: 1/A /
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Distance distribution function P(R) | Sofotware P(R): GNOM 5.0 / Number of points: 825 /
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Result | Type of curve: sec /
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