4FKE

Crystal structure of porcine aminopeptidase-N


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.142 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for multifunctional roles of mammalian aminopeptidase N.

Chen, L.Lin, Y.L.Peng, G.Li, F.

(2012) Proc.Natl.Acad.Sci.USA 109: 17966-17971

  • DOI: 10.1073/pnas.1210123109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mammalian aminopeptidase N (APN) plays multifunctional roles in many physiological processes, including peptide metabolism, cell motility and adhesion, and coronavirus entry. Here we determined crystal structures of porcine APN at 1.85 Å resolution a ...

    Mammalian aminopeptidase N (APN) plays multifunctional roles in many physiological processes, including peptide metabolism, cell motility and adhesion, and coronavirus entry. Here we determined crystal structures of porcine APN at 1.85 Å resolution and its complexes with a peptide substrate and a variety of inhibitors. APN is a cell surface-anchored and seahorse-shaped zinc-aminopeptidase that forms head-to-head dimers. Captured in a catalytically active state, these structures of APN illustrate a detailed catalytic mechanism for its aminopeptidase activity. The active site and peptide-binding channel of APN reside in cavities with wide openings, allowing easy access to peptides. The cavities can potentially open up further to bind the exposed N terminus of proteins. The active site anchors the N-terminal neutral residue of peptides/proteins, and the peptide-binding channel binds the remainder of the peptides/proteins in a sequence-independent fashion. APN also provides an exposed outer surface for coronavirus binding, without its physiological functions being affected. These structural features enable APN to function ubiquitously in peptide metabolism, interact with other proteins to mediate cell motility and adhesion, and serve as a coronavirus receptor. This study elucidates multifunctional roles of APN and can guide therapeutic efforts to treat APN-related diseases.


    Organizational Affiliation

    Department of Pharmacology, University of Minnesota Medical School, Minneapolis, MN 55455, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aminopeptidase N
A
909Sus scrofaGene Names: ANPEP
EC: 3.4.11.2
Find proteins for P15145 (Sus scrofa)
Go to Gene View: ANPEP
Go to UniProtKB:  P15145
Small Molecules
Ligands 2 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
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.142 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 259.971α = 90.00
b = 62.770β = 100.12
c = 81.794γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
SOLVEphasing
HKL-2000data collection
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-10-31
    Type: Database references, Structure summary
  • Version 1.2: 2012-11-14
    Type: Database references