Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 70746.87 
• Atom Count: 5034 
• Residue Count: 597 
• Unique protein chains: 2

4APH

Human angiotensin-converting enzyme in complex with angiotensin-II

• DOI: 10.2210/pdb4APH/pdb

• Classification: HYDROLASE/HORMONE
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus


• Deposited: 2012-04-03 Released: 2012-10-17 
• Deposition Author(s): Masuyer, G., Schwager, S.L.U., Sturrock, E.D., Isaac, R.E., Acharya, K.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.99 Å
• R-Value Free: 0.240 
• R-Value Work: 0.194 

Literature

Molecular Recognition and Regulation of Human Angiotensin-I Converting Enzyme (Ace) Activity by Natural Inhibitory Peptides.

Masuyer, G., Schwager, S.L.U., Sturrock, E.D., Isaac, R.E., Acharya, K.R.

(2012) Sci.Rep. 2: 717

• PubMed: 23056909 
• DOI: 10.1038/srep00717
• Primary Citation of Related Structures:  
  4APJ


• PubMed Abstract: 
  

Angiotensin-I converting enzyme (ACE), a two-domain dipeptidylcarboxypeptidase, is a key regulator of blood pressure as a result of its critical role in the renin-angiotensin-aldosterone and kallikrein-kinin systems. Hence it is an important drug target in the treatment of cardiovascular diseases. ACE is primarily known for its ability to cleave angiotensin I (Ang I) to the vasoactive octapeptide angiotensin II (Ang II), but is also able to cleave a number of other substrates including the vasodilator bradykinin and N-acetyl-Ser-Asp-Lys-Pro (Ac-SDKP), a physiological modulator of hematopoiesis. For the first time we provide a detailed biochemical and structural basis for the domain selectivity of the natural peptide inhibitors of ACE, bradykinin potentiating peptide b and Ang II. Moreover, Ang II showed selective competitive inhibition of the carboxy-terminal domain of human somatic ACE providing evidence for a regulatory role in the human renin-angiotensin system (RAS).

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Organizational Affiliation: 

Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ANGIOTENSIN-CONVERTING ENZYME	A	589	Homo sapiens	Mutation(s): 0  Gene Names: ACE (DCP, DCP1) EC: 3.2.1.-, 3.4.15.1
Find proteins for P12821 (Homo sapiens) Go to Gene View: ACE Go to UniProtKB:  P12821

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
ANGIOTENSIN-2	P	8	Homo sapiens	Mutation(s): 0  Gene Names: AGT (SERPINA8)
Find proteins for P01019 (Homo sapiens) Go to Gene View: AGT Go to UniProtKB:  P01019

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PE4	A	2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL POLYETHYLENE GLYCOL PEG4000 C16 H34 O8 PJWQOENWHPEPKI-UHFFFAOYSA-N
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT	A	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
BMA	A	BETA-D-MANNOSE C6 H12 O6 WQZGKKKJIJFFOK-RWOPYEJCSA-N
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.99 Å
• R-Value Free: 0.240 
• R-Value Work: 0.194 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 56.500	α = 90.00
b = 84.660	β = 90.00
c = 133.970	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-04-03 
• Released Date: 2012-10-17 
• Deposition Author(s): Masuyer, G., Schwager, S.L.U., Sturrock, E.D., Isaac, R.E., Acharya, K.R.

Revision History 

• Version 1.0: 2012-10-17
  Type: Initial release
• Version 1.1: 2012-10-24
  Type: Database references
• Version 1.2: 2017-01-25
  Type: Atomic model, Derived calculations, Non-polymer description, Other