1NPM

NEUROPSIN, A SERINE PROTEASE EXPRESSED IN THE LIMBIC SYSTEM OF MOUSE BRAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of neuropsin, a hippocampal protease involved in kindling epileptogenesis.

Kishi, T.Kato, M.Shimizu, T.Kato, K.Matsumoto, K.Yoshida, S.Shiosaka, S.Hakoshima, T.

(1999) J.Biol.Chem. 274: 4220-4224


  • PubMed Abstract: 
  • Neuropsin is a novel serine protease, the expression of which is highly localized in the limbic areas of the mouse brain and which is suggested to be involved in kindling epileptogenesis and hippocampal plasticity. The 2.1-A resolution crystal struct ...

    Neuropsin is a novel serine protease, the expression of which is highly localized in the limbic areas of the mouse brain and which is suggested to be involved in kindling epileptogenesis and hippocampal plasticity. The 2.1-A resolution crystal structure of neuropsin provides the first three-dimensional view of one of the serine proteases highly expressed in the nervous system, and reveals a serine protease fold that exhibits chimeric features between trypsin and nerve growth factor-gamma (NGFgamma), a member of the kallikrein family. Neuropsin possesses an N-glycosylated "kallikrein loop" but forms six disulfide bonds corresponding to those of trypsin. The ordered kallikrein loop projects proline toward the active site to restrict smaller residues or proline at the P2 position of substrates. Loop F, which participates in forming the S3/S4 sites, is similar to trypsin rather than NGFgamma. The unique conformations of loops G and H form an S1 pocket specific for both arginine and lysine. These characteristic loop structures forming the substrate-binding site suggest the novel substrate specificity of neuropsin and give a clue to the design of its specific inhibitors.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Analysis of Neuropsin, a Serine Protease Expressed in the Limbic System of Mouse Brain
      Kishi, T.,Kato, M.,Shimizu, T.,Kato, K.,Matsumoto, K.,Yoshida, S.,Shiosaka, S.,Hakoshima, T.
      (1997) J.Struct.Biol. 118: 248


    Organizational Affiliation

    Department of Molecular Biology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NEUROPSIN
A, B
225Mus musculusGene Names: Klk8 (Nrpn, Prss19)
EC: 3.4.21.118
Find proteins for Q61955 (Mus musculus)
Go to UniProtKB:  Q61955
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.186 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 38.400α = 95.38
b = 55.160β = 89.98
c = 65.370γ = 110.46
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
X-PLORmodel building
CCP4data scaling
X-PLORphasing
SCALA(CCP4)data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance