1R4L

Inhibitor Bound Human Angiotensin Converting Enzyme-Related Carboxypeptidase (ACE2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.337 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

ACE2 X-ray structures reveal a large hinge-bending motion important for inhibitor binding and catalysis.

Towler, P.Staker, B.Prasad, S.G.Menon, S.Tang, J.Parsons, T.Ryan, D.Fisher, M.Williams, D.Dales, N.A.Patane, M.A.Pantoliano, M.W.

(2004) J.Biol.Chem. 279: 17996-18007

  • DOI: 10.1074/jbc.M311191200
  • Primary Citation of Related Structures:  1R42

  • PubMed Abstract: 
  • The angiotensin-converting enzyme (ACE)-related carboxypeptidase, ACE2, is a type I integral membrane protein of 805 amino acids that contains one HEXXH + E zinc-binding consensus sequence. ACE2 has been implicated in the regulation of heart function ...

    The angiotensin-converting enzyme (ACE)-related carboxypeptidase, ACE2, is a type I integral membrane protein of 805 amino acids that contains one HEXXH + E zinc-binding consensus sequence. ACE2 has been implicated in the regulation of heart function and also as a functional receptor for the coronavirus that causes the severe acute respiratory syndrome (SARS). To gain further insights into this enzyme, the first crystal structures of the native and inhibitor-bound forms of the ACE2 extracellular domains were solved to 2.2- and 3.0-A resolution, respectively. Comparison of these structures revealed a large inhibitor-dependent hinge-bending movement of one catalytic subdomain relative to the other ( approximately 16 degrees ) that brings important residues into position for catalysis. The potent inhibitor MLN-4760 ((S,S)-2-[1-carboxy-2-[3-(3,5-dichlorobenzyl)-3H-imidazol4-yl]-ethylamino]-4-methylpentanoic acid) makes key binding interactions within the active site and offers insights regarding the action of residues involved in catalysis and substrate specificity. A few active site residue substitutions in ACE2 relative to ACE appear to eliminate the S(2)' substrate-binding subsite and account for the observed reactivity change from the peptidyl dipeptidase activity of ACE to the carboxypeptidase activity of ACE2.


    Related Citations: 
    • Hydrolysis of Biological Peptides by Human Angiotensin-converting Enzyme-related Carboxypeptidase
      Vickers, C.,Hales, P.,Kaushik, V.,Dick, L.,Gavin, J.,Tang, J.,Godbout, K.,Parsons, T.,Baronas, E.,Hsieh, F.,Acton, S.,Patane, M.,Nichols, A.,Tummino, P.
      (2002) J.Biol.Chem. 277: 14838
    • Substrate Based Design of the First Class of Angiotensin-Converting Enzyme-Related Carboxypeptidase (ACE2) Inhibitors
      Dales, N.,Gould, A.E.,Brown, J.A.,Calderwood, E.F.,Guan, B.,Minor, C.A.,Gavin, J.M.,Hales, P.,Kaushik, V.K.,Stewart, M.,Tummino, P.J.,Vickers, C.S.,Ocain, T.D.,Patane, M.A.
      (2002) J.Am.Chem.Soc. 124: 11852


    Organizational Affiliation

    Drug Discovery and Protein Sciences, Millennium Pharmaceuticals, Incorporated, Cambridge, Massachusetts 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
angiotensin I converting enzyme 2
A
615Homo sapiensGene Names: ACE2
EC: 3.4.17.23
Find proteins for Q9BYF1 (Homo sapiens)
Go to Gene View: ACE2
Go to UniProtKB:  Q9BYF1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
B
6N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
C
20N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
D
18N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
E
14N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
XX5
Query on XX5

Download SDF File 
Download CCD File 
A
(S,S)-2-{1-CARBOXY-2-[3-(3,5-DICHLORO-BENZYL)-3H-IMIDAZOL-4-YL]-ETHYLAMINO}-4-METHYL-PENTANOIC ACID
MLN-4760
C19 H23 Cl2 N3 O4
NTCCRGGIJNDEAB-IRXDYDNUSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
B, C, D, E
L-PEPTIDE LINKINGC4 H9 N O2

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
XX5IC50: 0.4 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.337 
  • R-Value Work: 0.253 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 100.531α = 90.00
b = 86.509β = 103.65
c = 105.858γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNXrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-03
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance