1GVL

Human prokallikrein 6 (hK6)/ prozyme/ proprotease M/ proneurosin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Structure of Human Prokallikrein 6 Reveals a Novel Activation Mechanism for the Kallikrein Family.

Gomis-Ruth, F.X.Bayes, A.Sotiropoulou, G.Pampalakis, G.Tsetsenis, T.Villegas, V.Aviles, F.X.Coll, M.

(2002) J Biol Chem 277: 27273

  • DOI: 10.1074/jbc.M201534200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Zyme/protease M/neurosin/human kallikrein 6 (hK6) is a member of the human kallikrein family of trypsin-like serine proteinases and was originally identified as being down-regulated in metastatic breast and ovarian tumors when compared with correspon ...

    Zyme/protease M/neurosin/human kallikrein 6 (hK6) is a member of the human kallikrein family of trypsin-like serine proteinases and was originally identified as being down-regulated in metastatic breast and ovarian tumors when compared with corresponding primary tumors. Recent evidence suggests that hK6 may serve as a circulating tumor marker in ovarian cancers. In addition, it was described in the brain of Parkinson's disease and Alzheimer's disease patients, where it is implicated in amyloid precursor protein processing. It is thus a biomarker for these diseases. To examine the mechanism of activation of hK6, we have solved the structure of its proform, the first of a human kallikrein family member. The proenzyme displays a fold that exhibits chimeric features between those of trypsinogen and other family members. It lacks the characteristic "kallikrein loop" and forms the six disulfide bridges of trypsin. Pro-hK6 displays a completely closed specificity pocket and a unique conformation of the regions involved in structural rearrangements upon proteolytic cleavage activation. This points to a novel activation mechanism, which could be extrapolated to other human kallikreins.


    Organizational Affiliation

    Institut de Biologia Molecular de Barcelona, Consejo Superior de Investigaciones Cientificas, c/Jordi Girona 18-26, Barcelona 08034, Spain. xgrcri@ibmb.csic.es



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KALLIKREIN 6A223Homo sapiensMutation(s): 2 
Gene Names: KLK6PRSS18PRSS9
EC: 3.4.21
Find proteins for Q92876 (Homo sapiens)
Explore Q92876 
Go to UniProtKB:  Q92876
NIH Common Fund Data Resources
PHAROS  Q92876
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46α = 90
b = 66.4β = 90
c = 71.2γ = 90
Software Package:
Software NamePurpose
CNSrefinement
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-16
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance