1R4L

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 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
  • Structures With Same Primary Citation

  • 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: 
    • 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
    • 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

    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 sapiensMutation(s): 0 
Gene Names: ACE2UNQ868/PRO1885
EC: 3.4.17.23 (UniProt), 3.4.17 (UniProt)
Find proteins for Q9BYF1 (Homo sapiens)
Go to UniProtKB:  Q9BYF1
NIH Common Fund Data Resources
PHAROS  Q9BYF1
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
B
6Homo sapiensMutation(s): 0 
Gene Names: ACE2
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
C
20Homo sapiensMutation(s): 0 
Gene Names: ACE2
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
D
18Homo sapiensMutation(s): 0 
Gene Names: ACE2
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
disordered segment of collectrin homology domain
E
14Homo sapiensMutation(s): 0 
Gene Names: ACE2
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
XX5
Query on XX5

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

Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
ZN
Query on ZN

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

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
XX5IC50:  0.4399999976158142   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 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
b = 86.509β = 103.65
c = 105.858γ = 90
Software Package:
Software NamePurpose
CNXrefinement
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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