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- PDB-8eyn: Crystal Structure of Human Mitochondrial NADP+ Malic Enzyme 3 in ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8eyn | ||||||
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Title | Crystal Structure of Human Mitochondrial NADP+ Malic Enzyme 3 in Apo Form | ||||||
![]() | NADP-dependent malic enzyme, mitochondrial | ||||||
![]() | OXIDOREDUCTASE / Malic Enzyme / Rossmann fold / ME3 / NADP(+)-binding | ||||||
Function / homology | ![]() oxygen metabolic process / malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+) / malic enzyme activity / malate dehydrogenase (decarboxylating) (NADP+) activity / oxaloacetate decarboxylase activity / Citric acid cycle (TCA cycle) / malate metabolic process / pyruvate metabolic process / NADP+ binding / aerobic respiration ...oxygen metabolic process / malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+) / malic enzyme activity / malate dehydrogenase (decarboxylating) (NADP+) activity / oxaloacetate decarboxylase activity / Citric acid cycle (TCA cycle) / malate metabolic process / pyruvate metabolic process / NADP+ binding / aerobic respiration / NAD binding / mitochondrial matrix / mitochondrion / metal ion binding Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Shaffer, P.L. / Grell, T.A.J. / Mason, M. / Thompson, A.A. / Riley, D. / Wagner, M.V. / Steele, R. / Ortiz-Meoz, R. / Wadia, J. / Sharma, S. / Yu, X. | ||||||
![]() | ![]() Title: Integrative structural and functional analysis of human malic enzyme 3: A potential therapeutic target for pancreatic cancer. Authors: Tsehai A J Grell / Mark Mason / Aaron A Thompson / Jose Carlos Gómez-Tamayo / Daniel Riley / Michelle V Wagner / Ruth Steele / Rodrigo F Ortiz-Meoz / Jay Wadia / Paul L Shaffer / Gary ...Authors: Tsehai A J Grell / Mark Mason / Aaron A Thompson / Jose Carlos Gómez-Tamayo / Daniel Riley / Michelle V Wagner / Ruth Steele / Rodrigo F Ortiz-Meoz / Jay Wadia / Paul L Shaffer / Gary Tresadern / Sujata Sharma / Xiaodi Yu / ![]() ![]() Abstract: Malic enzymes (ME1, ME2, and ME3) are involved in cellular energy regulation, redox homeostasis, and biosynthetic processes, through the production of pyruvate and reducing agent NAD(P)H. Recent ...Malic enzymes (ME1, ME2, and ME3) are involved in cellular energy regulation, redox homeostasis, and biosynthetic processes, through the production of pyruvate and reducing agent NAD(P)H. Recent studies have implicated the third and least well-characterized isoform, mitochondrial NADP-dependent malic enzyme 3 (ME3), as a therapeutic target for pancreatic cancers. Here, we utilized an integrated structure approach to determine the structures of ME3 in various ligand-binding states at near-atomic resolutions. ME3 is captured in the open form existing as a stable tetramer and its dynamic Domain C is critical for activity. Catalytic assay results reveal that ME3 is a non-allosteric enzyme and does not require modulators for activity while structural analysis suggests that the inner stability of ME3 Domain A relative to ME2 disables allostery in ME3. With structural information available for all three malic enzymes, the foundation has been laid to understand the structural and biochemical differences of these enzymes and could aid in the development of specific malic enzyme small molecule drugs. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 559.8 KB | Display | ![]() |
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PDB format | ![]() | 382.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 447.7 KB | Display | ![]() |
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Full document | ![]() | 451.2 KB | Display | |
Data in XML | ![]() | 50.6 KB | Display | |
Data in CIF | ![]() | 76.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8e76C ![]() 8e78C ![]() 8e8oC ![]() 8eyoC ![]() 1qr6S 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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1 | ![]()
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Unit cell |
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Components on special symmetry positions |
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Components
#1: Protein | Mass: 63829.352 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q16798, malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+) #2: Chemical | #3: Water | ChemComp-HOH / | Has ligand of interest | N | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.67 Å3/Da / Density % sol: 53.87 % |
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Crystal grow | Temperature: 277 K / Method: vapor diffusion / pH: 7 Details: 0.1M Ammonium Tartrate dibasic, 12% PEG-3350, 0.02 Potassium Citrate tribasic |
-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: Oct 20, 2018 |
Radiation | Monochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 1.94→38.5 Å / Num. obs: 100206 / % possible obs: 99.4 % / Redundancy: 6.6 % / Biso Wilson estimate: 26.45 Å2 / CC1/2: 0.998 / Rrim(I) all: 0.12 / Rsym value: 0.11 / Net I/σ(I): 13.37 |
Reflection shell | Resolution: 1.94→1.99 Å / Redundancy: 6.8 % / Mean I/σ(I) obs: 2.06 / Num. unique obs: 49564 / CC1/2: 0.698 / Rrim(I) all: 1.09 / Rsym value: 1.01 / % possible all: 98.9 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 1QR6 Resolution: 1.94→38.5 Å / SU ML: 0.1799 / Cross valid method: FREE R-VALUE / Phase error: 18.736 Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
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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 mean: 31.38 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 1.94→38.5 Å
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Refine LS restraints |
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LS refinement shell |
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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