4QHP

Crystal structure of Aminopeptidase N in complex with the phosphinic dipeptide analogue LL-(R,S)-hPheP[CH2]Phe(4-CH2NH2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure-guided, single-point modifications in the phosphinic dipeptide structure yield highly potent and selective inhibitors of neutral aminopeptidases.

Vassiliou, S.Weglarz-Tomczak, E.Berlicki, L.Paweczak, M.Nocek, B.Mulligan, R.Joachimiak, A.Mucha, A.

(2014) J Med Chem 57: 8140-8151

  • DOI: 10.1021/jm501071f
  • Primary Citation of Related Structures:  
    4QHP, 4QIR, 4QME, 4QPE, 4QUO

  • PubMed Abstract: 
  • Seven crystal structures of alanyl aminopeptidase from Neisseria meningitides (the etiological agent of meningitis, NmAPN) complexed with organophosphorus compounds were resolved to determine the optimal inhibitor-enzyme interactions. The enantiomeric phosphonic acid analogs of Leu and hPhe, which correspond to the P1 amino acid residues of well-processed substrates, were used to assess the impact of the absolute configuration and the stereospecific hydrogen bond network formed between the aminophosphonate polar head and the active site residues on the binding affinity ...

    Seven crystal structures of alanyl aminopeptidase from Neisseria meningitides (the etiological agent of meningitis, NmAPN) complexed with organophosphorus compounds were resolved to determine the optimal inhibitor-enzyme interactions. The enantiomeric phosphonic acid analogs of Leu and hPhe, which correspond to the P1 amino acid residues of well-processed substrates, were used to assess the impact of the absolute configuration and the stereospecific hydrogen bond network formed between the aminophosphonate polar head and the active site residues on the binding affinity. For the hPhe analog, an imperfect stereochemical complementarity could be overcome by incorporating an appropriate P1 side chain. The constitution of P1'-extended structures was rationally designed and the lead, phosphinic dipeptide hPhePψ[CH2]Phe, was modified in a single position. Introducing a heteroatom/heteroatom-based fragment to either the P1 or P1' residue required new synthetic pathways. The compounds in the refined structure were low nanomolar and subnanomolar inhibitors of N. meningitides, porcine and human APNs, and the reference leucine aminopeptidase (LAP). The unnatural phosphinic dipeptide analogs exhibited a high affinity for monozinc APNs associated with a reasonable selectivity versus dizinc LAP. Another set of crystal structures containing the NmAPN dipeptide ligand were used to verify and to confirm the predicted binding modes; furthermore, novel contacts, which were promising for inhibitor development, were identified, including a π-π stacking interaction between a pyridine ring and Tyr372.


    Organizational Affiliation

    Laboratory of Organic Chemistry, Department of Chemistry, University of Athens , Panepistimiopolis, Zografou, 15701 Athens, Greece.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Aminopeptidase N A870Neisseria meningitidisMutation(s): 0 
Gene Names: pepNNMB1416
EC: 3.4.11.2
Find proteins for Q9JYV4 (Neisseria meningitidis serogroup B (strain MC58))
Explore Q9JYV4 
Go to UniProtKB:  Q9JYV4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
32Q
Query on 32Q

Download Ideal Coordinates CCD File 
A
(2S)-2-[4-(aminomethyl)benzyl]-3-[(R)-[(1R)-1-amino-3-phenylpropyl](hydroxy)phosphoryl]propanoic acid
C20 H27 N2 O4 P
XZFPYKBNMOQQLL-RTBURBONSA-N
 Ligand Interaction
32R
Query on 32R

Download Ideal Coordinates CCD File 
A
(2R)-2-[4-(aminomethyl)benzyl]-3-[(R)-[(1R)-1-amino-3-phenylpropyl](hydroxy)phosphoryl]propanoic acid
C20 H27 N2 O4 P
XZFPYKBNMOQQLL-RBUKOAKNSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IMD
Query on IMD

Download Ideal Coordinates CCD File 
A
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
32RKi:  9   nM  Binding MOAD
32QKi:  9   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 223.76α = 90
b = 223.76β = 90
c = 57.876γ = 120
Software Package:
Software NamePurpose
SBC-Collectdata collection
MOLREPphasing
CCP4model building
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
CCP4phasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-24
    Type: Initial release
  • Version 1.1: 2014-10-22
    Changes: Database references