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- PDB-9clx: Angiotensin I converting enzyme full-length dimer -

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Basic information

Entry
Database: PDB / ID: 9clx
TitleAngiotensin I converting enzyme full-length dimer
ComponentsAngiotensin-converting enzyme
KeywordsHYDROLASE / protease / dimer
Function / homology
Function and homology information


mononuclear cell proliferation / cell proliferation in bone marrow / bradykinin receptor binding / exopeptidase activity / regulation of angiotensin metabolic process / substance P catabolic process / tripeptidyl-peptidase activity / peptidyl-dipeptidase A / regulation of renal output by angiotensin / negative regulation of gap junction assembly ...mononuclear cell proliferation / cell proliferation in bone marrow / bradykinin receptor binding / exopeptidase activity / regulation of angiotensin metabolic process / substance P catabolic process / tripeptidyl-peptidase activity / peptidyl-dipeptidase A / regulation of renal output by angiotensin / negative regulation of gap junction assembly / hormone catabolic process / bradykinin catabolic process / metallodipeptidase activity / regulation of smooth muscle cell migration / regulation of hematopoietic stem cell proliferation / neutrophil mediated immunity / hormone metabolic process / mitogen-activated protein kinase binding / chloride ion binding / arachidonate secretion / mitogen-activated protein kinase kinase binding / post-transcriptional regulation of gene expression / peptide catabolic process / heart contraction / antigen processing and presentation of peptide antigen via MHC class I / positive regulation of systemic arterial blood pressure / regulation of heart rate by cardiac conduction / regulation of systemic arterial blood pressure by renin-angiotensin / blood vessel remodeling / amyloid-beta metabolic process / hematopoietic stem cell differentiation / regulation of vasoconstriction / peptidyl-dipeptidase activity / Metabolism of Angiotensinogen to Angiotensins / angiotensin maturation / metallocarboxypeptidase activity / blood vessel diameter maintenance / angiotensin-activated signaling pathway / kidney development / regulation of synaptic plasticity / metalloendopeptidase activity / regulation of blood pressure / male gonad development / metallopeptidase activity / peptidase activity / actin binding / spermatogenesis / endopeptidase activity / lysosome / calmodulin binding / endosome / external side of plasma membrane / negative regulation of gene expression / proteolysis / extracellular space / extracellular exosome / extracellular region / zinc ion binding / plasma membrane
Similarity search - Function
Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Neutral zinc metallopeptidases, zinc-binding region signature.
Similarity search - Domain/homology
Angiotensin-converting enzyme
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.65 Å
AuthorsMancl, J.M. / Tang, W.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: Elife / Year: 2025
Title: Dimerization and dynamics of angiotensin-I converting enzyme revealed by cryoEM and MD simulations
Authors: Mancl, J.M. / Wu, X. / Zhao, M. / Tang, W.J.
History
DepositionJul 12, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 18, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Angiotensin-converting enzyme
B: Angiotensin-converting enzyme
hetero molecules


Theoretical massNumber of molelcules
Total (without water)293,04621
Polymers285,6102
Non-polymers7,43619
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Angiotensin-converting enzyme / ACE / Dipeptidyl carboxypeptidase I / Kininase II


Mass: 142804.797 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ACE, DCP, DCP1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P12821, peptidyl-dipeptidase A
#2: 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


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}LINUCSPDB-CARE
#3: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1- ...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


Type: oligosaccharide / Mass: 732.682 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,4,3/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1221m-1a_1-5]/1-1-2-3/a4-b1_a6-d1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}[(6+1)][a-L-Fucp]{}}LINUCSPDB-CARE
#4: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 8 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#5: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
Has ligand of interestN
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Angiotensin I converting enzyme apo-state / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human) / Cell: HEK293
Buffer solutionpH: 5
Buffer component
IDConc.NameBuffer-ID
125 mMcitrate1
225 mMsodium phosphate1
3150 mMsodium chloride1
410 mMEDTA1
SpecimenConc.: 4.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 293 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.65 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 88930 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00420644
ELECTRON MICROSCOPYf_angle_d0.64628113
ELECTRON MICROSCOPYf_dihedral_angle_d7.3873416
ELECTRON MICROSCOPYf_chiral_restr0.0423030
ELECTRON MICROSCOPYf_plane_restr0.0043603

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