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- PDB-7q3y: Structure of full-length, monomeric, soluble somatic angiotensin ... -
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Basic information
Entry | Database: PDB / ID: 7q3y | ||||||
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Title | Structure of full-length, monomeric, soluble somatic angiotensin I-converting enzyme showing the N- and C-terminal ellipsoid domains | ||||||
![]() | Angiotensin-converting enzyme | ||||||
![]() | HYDROLASE / Zinc metalloprotease Dicarboxypeptidase Glycoprotein | ||||||
Function / homology | ![]() mononuclear cell proliferation / cell proliferation in bone marrow / bradykinin receptor binding / regulation of angiotensin metabolic process / exopeptidase activity / substance P catabolic process / peptidyl-dipeptidase A / tripeptidyl-peptidase activity / regulation of renal output by angiotensin / negative regulation of calcium ion import ...mononuclear cell proliferation / cell proliferation in bone marrow / bradykinin receptor binding / regulation of angiotensin metabolic process / exopeptidase activity / substance P catabolic process / peptidyl-dipeptidase A / tripeptidyl-peptidase activity / regulation of renal output by angiotensin / negative regulation of calcium ion import / positive regulation of peptidyl-cysteine S-nitrosylation / response to laminar fluid shear stress / positive regulation of systemic arterial blood pressure / negative regulation of gap junction assembly / metallodipeptidase activity / cellular response to aldosterone / hormone catabolic process / bradykinin catabolic process / angiogenesis involved in coronary vascular morphogenesis / response to thyroid hormone / negative regulation of glucose import / vasoconstriction / neutrophil mediated immunity / regulation of smooth muscle cell migration / regulation of hematopoietic stem cell proliferation / antigen processing and presentation of peptide antigen via MHC class I / hormone metabolic process / mitogen-activated protein kinase binding / embryo development ending in birth or egg hatching / chloride ion binding / mitogen-activated protein kinase kinase binding / positive regulation of neurogenesis / arachidonate secretion / post-transcriptional regulation of gene expression / eating behavior / peptide catabolic process / lung alveolus development / heart contraction / heterocyclic compound binding / response to dexamethasone / regulation of heart rate by cardiac conduction / positive regulation of vasoconstriction / regulation of systemic arterial blood pressure by renin-angiotensin / regulation of vasoconstriction / hematopoietic stem cell differentiation / peptidyl-dipeptidase activity / blood vessel remodeling / amyloid-beta metabolic process / angiotensin maturation / animal organ regeneration / Metabolism of Angiotensinogen to Angiotensins / basal plasma membrane / carboxypeptidase activity / sperm midpiece / blood vessel diameter maintenance / response to nutrient levels / kidney development / angiotensin-activated signaling pathway / female pregnancy / cellular response to glucose stimulus / brush border membrane / regulation of blood pressure / regulation of synaptic plasticity / metalloendopeptidase activity / male gonad development / metallopeptidase activity / peptidase activity / actin binding / endopeptidase activity / spermatogenesis / response to lipopolysaccharide / endosome / calmodulin binding / lysosome / response to hypoxia / response to xenobiotic stimulus / positive regulation of apoptotic process / external side of plasma membrane / negative regulation of gene expression / proteolysis / extracellular space / zinc ion binding / extracellular exosome / extracellular region / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.34 Å | ||||||
![]() | Lubbe, L. / Sewell, B.T. / Sturrock, E.D. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM reveals mechanisms of angiotensin I-converting enzyme allostery and dimerization. Authors: Lizelle Lubbe / Bryan Trevor Sewell / Jeremy D Woodward / Edward D Sturrock / ![]() Abstract: Hypertension (high blood pressure) is a major risk factor for cardiovascular disease, which is the leading cause of death worldwide. The somatic isoform of angiotensin I-converting enzyme (sACE) ...Hypertension (high blood pressure) is a major risk factor for cardiovascular disease, which is the leading cause of death worldwide. The somatic isoform of angiotensin I-converting enzyme (sACE) plays a critical role in blood pressure regulation, and ACE inhibitors are thus widely used to treat hypertension and cardiovascular disease. Our current understanding of sACE structure, dynamics, function, and inhibition has been limited because truncated, minimally glycosylated forms of sACE are typically used for X-ray crystallography and molecular dynamics simulations. Here, we report the first cryo-EM structures of full-length, glycosylated, soluble sACE (sACE ). Both monomeric and dimeric forms of the highly flexible apo enzyme were reconstructed from a single dataset. The N- and C-terminal domains of monomeric sACE were resolved at 3.7 and 4.1 Å, respectively, while the interacting N-terminal domains responsible for dimer formation were resolved at 3.8 Å. Mechanisms are proposed for intradomain hinging, cooperativity, and homodimerization. Furthermore, the observation that both domains were in the open conformation has implications for the design of sACE modulators. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 430.7 KB | Display | ![]() |
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PDB format | ![]() | 355 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2 MB | Display | ![]() |
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Full document | ![]() | 2 MB | Display | |
Data in XML | ![]() | 45 KB | Display | |
Data in CIF | ![]() | 63.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 13797MC ![]() 7q49C ![]() 7q4cC ![]() 7q4dC ![]() 7q4eC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
EM raw data | ![]() Data size: 3.8 TB Data #1: Unaligned multi-frame cryo-EM micrographs of human somatic angiotensin I-converting enzyme in the apo state [micrographs - multiframe]) |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 1 types, 1 molecules A
#1: Protein | Mass: 139614.000 Da / Num. of mol.: 1 / Mutation: P576L Source method: isolated from a genetically manipulated source Details: Soluble secreted form of human somatic angiotensin I-converting enzyme terminating at Ser1211 Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: P12821, Hydrolases; Glycosylases; Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds, peptidyl-dipeptidase A |
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-Sugars , 6 types, 13 molecules ![](data/chem/img/NAG.gif)
#2: Polysaccharide | alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source | ||||||||
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#3: Polysaccharide | Source method: isolated from a genetically manipulated source #4: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #5: Polysaccharide | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #6: Polysaccharide | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #9: Sugar | ChemComp-NAG / |
-Non-polymers , 3 types, 3 molecules ![](data/chem/img/ZN.gif)
![](data/chem/img/CL.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/CL.gif)
![](data/chem/img/HOH.gif)
#7: Chemical | ChemComp-ZN / |
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#8: Chemical | ChemComp-CL / |
#10: Water | ChemComp-HOH / |
-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: full-length, soluble, monomeric somatic angiotensin I-converting enzyme Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | ||||||||||||||||||||
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Molecular weight | Value: 0.139 MDa / Experimental value: NO | ||||||||||||||||||||
Source (natural) | Organism: ![]() | ||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | ||||||||||||||||||||
Buffer solution | pH: 7.5 / Details: Solutions were prepared with deionized water | ||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: The protein was stored at 3.0mg/ml in 50mM HEPES (pH 7.5) and diluted immediately prior to grid preparation | ||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/2 | ||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K Details: Diluted protein (in buffer containing zinc chloride and sodium chloride) was incubated on ice for 30 minutes after which it was applied to the grid, incubated for 30 seconds, and blotted for ...Details: Diluted protein (in buffer containing zinc chloride and sodium chloride) was incubated on ice for 30 minutes after which it was applied to the grid, incubated for 30 seconds, and blotted for 3 seconds before plunging |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 81000 X / Nominal defocus max: 3000 nm / Nominal defocus min: 1800 nm / Cs: 2.7 mm |
Specimen holder | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 3 sec. / Electron dose: 43 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 11628 Details: Images were recorded in super-resolution mode with 40 frames per image |
Image scans | Width: 5760 / Height: 4092 |
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Processing
Software |
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EM software |
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CTF correction | Details: cryoSPARC patch-based CTF estimation / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1727045 Details: Topaz-denoising was performed on all curated micrographs, a Topaz model trained on this dataset, and used for picking | |||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.34 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 121372 / Details: cryoSPARC non-uniform refinement was used / Num. of class averages: 81 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient | |||||||||||||||||||||||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | |||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 131.96 Å2 | |||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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