Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 70.71 kDa 
• Atom Count: 5319 
• Modelled Residue Count: 590 
• Deposited Residue Count: 597 
• Unique protein chains: 2

4APH

Human angiotensin-converting enzyme in complex with angiotensin-II

• PDB DOI: 10.2210/pdb4APH/pdb

• Classification: HYDROLASE/HORMONE
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus
• Mutation(s): No 


• 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 
• R-Value Observed: 0.196 

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:  
  4APH, 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANGIOTENSIN-CONVERTING ENZYME	A	589	Homo sapiens	Mutation(s): 0  Gene Names: ACE, DCP, DCP1 EC: 3.2.1 (PDB Primary Data), 3.4.15.1 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P12821 (Homo sapiens) Explore P12821  Go to UniProtKB:  P12821
PHAROS:  P12821 GTEx:  ENSG00000159640

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ANGIOTENSIN-2	B [auth P]	8	Homo sapiens	Mutation(s): 0  Gene Names: AGT, SERPINA8
UniProt & NIH Common Fund Data Resources
Find proteins for P01019 (Homo sapiens) Explore P01019  Go to UniProtKB:  P01019
PHAROS:  P01019 GTEx:  ENSG00000135744

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C [auth B]	3		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G15407YE GlyCosmos:  G15407YE GlyGen:  G15407YE

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PE4	G [auth A]	2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL C16 H34 O8 PJWQOENWHPEPKI-UHFFFAOYSA-N
NAG	H [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
ZN	E [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT	I [auth A], J [auth A], K [auth A], L [auth A], M [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CL	D [auth A], F [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.99 Å
• R-Value Free: 0.240 
• R-Value Work: 0.194 
• R-Value Observed: 0.196 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.5	α = 90
b = 84.66	β = 90
c = 133.97	γ = 90

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
  Changes: Database references
• Version 1.2: 2017-01-25
  Changes: Atomic model, Derived calculations, Non-polymer description, Other
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary