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- PDB-7ten: Crystal structure of the Listeria monocytogenes GS-Met-Sox-P- ADP... -
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Basic information
Entry | Database: PDB / ID: 7ten | ||||||
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Title | Crystal structure of the Listeria monocytogenes GS-Met-Sox-P- ADP complex to 3.5 Angstrom | ||||||
![]() | Glutamine synthetase | ||||||
![]() | LIGASE/INHIBITOR / glutamate ammonium ligase / GlnR / GS / glutamine synthetase / Met-Sox / transition state / LIGASE / LIGASE-INHIBITOR complex | ||||||
Function / homology | ![]() glutamine synthetase / polyamine catabolic process / glutamine biosynthetic process / glutamine synthetase activity / ATP binding / metal ion binding / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() ![]() | ||||||
![]() | Schumacher, M.A. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Molecular dissection of the glutamine synthetase-GlnR nitrogen regulatory circuitry in Gram-positive bacteria. Authors: Brady A Travis / Jared V Peck / Raul Salinas / Brandon Dopkins / Nicholas Lent / Viet D Nguyen / Mario J Borgnia / Richard G Brennan / Maria A Schumacher / ![]() Abstract: How bacteria sense and respond to nitrogen levels are central questions in microbial physiology. In Gram-positive bacteria, nitrogen homeostasis is controlled by an operon encoding glutamine ...How bacteria sense and respond to nitrogen levels are central questions in microbial physiology. In Gram-positive bacteria, nitrogen homeostasis is controlled by an operon encoding glutamine synthetase (GS), a dodecameric machine that assimilates ammonium into glutamine, and the GlnR repressor. GlnR detects nitrogen excess indirectly by binding glutamine-feedback-inhibited-GS (FBI-GS), which activates its transcription-repression function. The molecular mechanisms behind this regulatory circuitry, however, are unknown. Here we describe biochemical and structural analyses of GS and FBI-GS-GlnR complexes from pathogenic and non-pathogenic Gram-positive bacteria. The structures show FBI-GS binds the GlnR C-terminal domain within its active-site cavity, juxtaposing two GlnR monomers to form a DNA-binding-competent GlnR dimer. The FBI-GS-GlnR interaction stabilizes the inactive GS conformation. Strikingly, this interaction also favors a remarkable dodecamer to tetradecamer transition in some GS, breaking the paradigm that all bacterial GS are dodecamers. These data thus unveil unique structural mechanisms of transcription and enzymatic regulation. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.1 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 5.3 MB | Display | ![]() |
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Full document | ![]() | 5.5 MB | Display | |
Data in XML | ![]() | 202.6 KB | Display | |
Data in CIF | ![]() | 261.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7tdpSC ![]() 7tdvC ![]() 7teaC ![]() 7tecC ![]() 7tf6C ![]() 7tf7C ![]() 7tf9C ![]() 7tfaC ![]() 7tfbC ![]() 7tfcC ![]() 7tfdC ![]() 7tfeC S: Starting model for refinement C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components
#1: Protein | Mass: 50874.691 Da / Num. of mol.: 12 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: glnA, BW273_06565, CW834_10155, E3W32_09805, E5H26_02065, FL871_07615, GF092_00575, GIG92_01785, GIH49_01255, HF764_002412 Production host: ![]() ![]() #2: Chemical | ChemComp-ADP / #3: Chemical | ChemComp-P3S / Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.81 Å3/Da / Density % sol: 56.15 % |
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Crystal grow | Temperature: 298 K / Method: vapor diffusion, hanging drop Details: 15% PEG 4000, 40 mM potassium phosphate dibasic pH 7.5, 20% glycerol |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Mar 12, 2021 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.01 Å / Relative weight: 1 |
Reflection | Resolution: 3.5→63.88 Å / Num. obs: 62204 / % possible obs: 74.7 % / Redundancy: 3.1 % / CC1/2: 0.995 / Rpim(I) all: 0.13 / Rsym value: 0.184 / Net I/σ(I): 4.8 |
Reflection shell | Resolution: 3.5→3.62 Å / Mean I/σ(I) obs: 1.2 / Num. unique obs: 6451 / CC1/2: 0.323 / Rpim(I) all: 0.966 / Rsym value: 1.15 |
-Phasing
Phasing | Method: ![]() |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 7TDP Resolution: 3.5→63.88 Å / SU ML: 0.55 / Cross valid method: THROUGHOUT / σ(F): 1.96 / Phase error: 30.51 / Stereochemistry target values: ML
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso max: 283.39 Å2 / Biso mean: 113.2813 Å2 / Biso min: 42.11 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: final / Resolution: 3.5→63.88 Å
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Refine LS restraints |
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LS refinement shell | Refine-ID: X-RAY DIFFRACTION / Rfactor Rfree error: 0 / Total num. of bins used: 14
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Refinement TLS params. | Method: refined / Origin x: 10.124 Å / Origin y: -44.8282 Å / Origin z: 0.4931 Å
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Refinement TLS group |
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