4FYT

Human aminopeptidase N (CD13) in complex with amastatin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The X-ray Crystal Structure of Human Aminopeptidase N Reveals a Novel Dimer and the Basis for Peptide Processing.

Wong, A.H.Zhou, D.Rini, J.M.

(2012) J.Biol.Chem. 287: 36804-36813

  • DOI: 10.1074/jbc.M112.398842
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human aminopeptidase N (hAPN/hCD13) is a dimeric membrane protein and a member of the M1 family of zinc metallopeptidases. Within the rennin-angiotensin system, its enzymatic activity is responsible for processing peptide hormones angiotensin III and ...

    Human aminopeptidase N (hAPN/hCD13) is a dimeric membrane protein and a member of the M1 family of zinc metallopeptidases. Within the rennin-angiotensin system, its enzymatic activity is responsible for processing peptide hormones angiotensin III and IV. In addition, hAPN is also involved in cell adhesion, endocytosis, and signal transduction and it is an important target for cancer therapy. Reported here are the high resolution x-ray crystal structures of the dimeric ectodomain of hAPN and its complexes with angiotensin IV and the peptidomimetic inhibitors, amastatin and bestatin. Each monomer of the dimer is found in what has been termed the closed form in other M1 enzymes and each monomer is characterized by an internal cavity surrounding the catalytic site as well as a unique substrate/inhibitor-dependent loop ordering, which in the case of the bestatin complex suggests a new route to inhibitor design. The hAPN structure provides the first example of a dimeric M1 family member and the observed structural features, in conjunction with a model for the open form, provide novel insights into the mechanism of peptide processing and signal transduction.


    Organizational Affiliation

    Department of Biochemistry, University of Toronto, Toronto, Ontario M5S 1A8, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aminopeptidase N
A
903Homo sapiensMutation(s): 0 
Gene Names: ANPEP (APN, CD13, PEPN)
EC: 3.4.11.2
Find proteins for P15144 (Homo sapiens)
Go to Gene View: ANPEP
Go to UniProtKB:  P15144
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AMASTATIN
B
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 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
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 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
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000415
Query on PRD_000415
BAmastatinPeptide-like / Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.169 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 157.470α = 90.00
b = 157.470β = 90.00
c = 115.130γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-07-05 
  • Released Date: 2012-09-05 
  • Deposition Author(s): Wong, A.H., Rini, J.M.

Revision History 

  • Version 1.0: 2012-09-05
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references
  • Version 1.2: 2013-02-27
    Type: Other
  • Version 1.3: 2017-11-15
    Type: Refinement description