2QXI

High resolution structure of Human Kallikrein 7 in Complex with Suc-Ala-Ala-Pro-Phe-chloromethylketone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.159 
  • R-Value Work: 0.131 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Chymotryptic specificity determinants in the 1.0 A structure of the zinc-inhibited human tissue kallikrein 7.

Debela, M.Hess, P.Magdolen, V.Schechter, N.M.Steiner, T.Huber, R.Bode, W.Goettig, P.

(2007) Proc.Natl.Acad.Sci.Usa 104: 16086-16091

  • DOI: 10.1073/pnas.0707811104
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • hK7 or human stratum corneum chymotryptic enzyme belongs to the human tissue kallikrein (hKs) serine proteinase family and is strongly expressed in the upper layers of the epidermis. It participates in skin desquamation but is also implicated in dive ...

    hK7 or human stratum corneum chymotryptic enzyme belongs to the human tissue kallikrein (hKs) serine proteinase family and is strongly expressed in the upper layers of the epidermis. It participates in skin desquamation but is also implicated in diverse skin diseases and is a potential biomarker of ovarian cancer. We have solved x-ray structures of recombinant active hK7 at medium and atomic resolution in the presence of the inhibitors succinyl-Ala-Ala-Pro-Phe-chloromethyl ketone and Ala-Ala-Phe-chloromethyl ketone. The most distinguishing features of hK7 are the short 70-80 loop and the unique S1 pocket, which prefers P1 Tyr residues, as shown by kinetic data. Similar to several other kallikreins, the enzyme activity is inhibited by Zn(2+) and Cu(2+) at low micromolar concentrations. Biochemical analyses of the mutants H99A and H41F confirm that only the metal-binding site at His(99) close to the catalytic triad accounts for the noncompetitive Zn(2+) inhibition type. Additionally, hK7 exhibits large positively charged surface patches, representing putative exosites for prime side substrate recognition.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Proteinase Research Group, Am Klopferspitz 18, 82152 Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kallikrein-7
A
224Homo sapiensMutation(s): 0 
Gene Names: KLK7 (PRSS6, SCCE)
EC: 3.4.21.117
Find proteins for P49862 (Homo sapiens)
Go to Gene View: KLK7
Go to UniProtKB:  P49862
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K7J
Query on K7J

Download SDF File 
Download CCD File 
A
N-(3-carboxypropanoyl)-L-alanyl-L-alanyl-N-[(2S,3S)-4-chloro-3-hydroxy-1-phenylbutan-2-yl]-L-prolinamide
SUCCINYL-ALA-ALA-PRO-PHE-CHLOROMETHYL KETONE
C25 H35 Cl N4 O7
NDDWTTUSJLUGKF-CZKCSJLSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.159 
  • R-Value Work: 0.131 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 38.254α = 90.00
b = 56.953β = 101.37
c = 45.533γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97refinement
MOSFLMdata reduction
SHELXrefinement
PDB_EXTRACTdata extraction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2018-01-24
    Type: Advisory, Structure summary