4CA5

Human Angiotensin converting enzyme in complex with a phosphinic tripeptide FI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structures of Highly Specific Phosphinic Tripeptide Enantiomers in Complex with the Angiotensin-I Converting Enzyme.

Masuyer, G.Akif, M.Czarny, B.Beau, F.Schwager, S.L.Sturrock, E.D.Isaac, R.E.Dive, V.Acharya, K.R.

(2014) FEBS J. 281: 943

  • DOI: 10.1111/febs.12660
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human somatic angiotensin-I converting enzyme (ACE) is a zinc-dependent dipeptidyl carboxypeptidase and a central component of the renin angiotensin aldosterone system (RAAS). Its involvement in the modulation of physiological actions of peptide horm ...

    Human somatic angiotensin-I converting enzyme (ACE) is a zinc-dependent dipeptidyl carboxypeptidase and a central component of the renin angiotensin aldosterone system (RAAS). Its involvement in the modulation of physiological actions of peptide hormones has positioned ACE as an important therapeutic target for the treatment of hypertension and cardiovascular disorders. Here, we report the crystal structures of the two catalytic domains of human ACE (N- and C-) in complex with FI, the S enantiomer of the phosphinic ACE/ECE-1 (endothelin converting enzyme) dual inhibitor FII, to a resolution of 1.91 and 1.85 Å, respectively. In addition, we have determined the structure of AnCE (an ACE homologue from Drosophila melanogaster) in complex with both isomers. The inhibitor FI (S configuration) can adapt to the active site of ACE catalytic domains and shows key differences in its binding mechanism mostly through the reorientation of the isoxazole phenyl side group at the P₁' position compared with FII (R configuration). Differences in binding are also observed between FI and FII in complex with AnCE. Thus, the new structures of the ACE-inhibitor complexes presented here provide useful information for further exploration of ACE inhibitor pharmacophores involving phosphinic peptides and illustrate the role of chirality in enhancing drug specificity.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ANGIOTENSIN-CONVERTING ENZYME
A
589Homo sapiensMutation(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
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
3EF
Query on 3EF

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A
N-{(2S)-3-[(S)-[(1R)-1-{[(benzyloxy)carbonyl]amino}-2-phenylethyl](hydroxy)phosphoryl]-2-[(3-phenyl-1,2-oxazol-5-yl)methyl]propanoyl}-L-tyrosine
C38 H38 N3 O9 P
ZPFSKFCSVXPMBD-JHOVWCEZSA-N
 Ligand Interaction
ACT
Query on ACT

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A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FUC
Query on FUC

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A
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
PEG
Query on PEG

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A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
3EFKi: 0.4 nM (100) BINDINGDB
3EFKi: 0.41 nM BINDINGMOAD
3EFKi: 0.41 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.430α = 90.00
b = 84.980β = 90.00
c = 133.900γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-12-11
    Type: Initial release
  • Version 1.1: 2014-02-12
    Type: Database references