5EI0

Structure of RCL-cleaved vaspin (serpinA12)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of cleaved vaspin (serpinA12).

Pippel, J.Kuettner, E.B.Ulbricht, D.Daberger, J.Schultz, S.Heiker, J.T.Strater, N.

(2016) Biol.Chem. 397: 111-123

  • DOI: 10.1515/hsz-2015-0229

  • PubMed Abstract: 
  • The adipokine vaspin (serpinA12) is mainly expressed in white adipose tissue and exhibits various beneficial effects on obesity-related processes. Kallikrein 7 is the only known target protease of vaspin and is inhibited by the classical serpin inhib ...

    The adipokine vaspin (serpinA12) is mainly expressed in white adipose tissue and exhibits various beneficial effects on obesity-related processes. Kallikrein 7 is the only known target protease of vaspin and is inhibited by the classical serpin inhibitory mechanism involving a cleavage of the reactive center loop between P1 (M378) and P1' (E379). Here, we present the X-ray structure of vaspin, cleaved between M378 and E379. We provide a comprehensive analysis of differences between the uncleaved and cleaved forms in the shutter, breach, and hinge regions with relation to common molecular features underlying the serpin inhibitory mode. Furthermore, we point out differences towards other serpins and provide novel data underlining the remarkable stability of vaspin. We speculate that the previously reported FKGx1Wx2x3 motif in the breach region may play a decisive role in determining the reactive center loop configuration in the native vaspin state and might contribute to the high thermostability of vaspin. Thus, this structure may provide a basis for future mutational studies.


    Related Citations: 
    • A unique serpin P1' glutamate and a conserved beta-sheet C arginine are key residues for activity, protease recognition and stability of serpinA12 (vaspin).
      Ulbricht, D.,Pippel, J.,Schultz, S.,Meier, R.,Strater, N.,Heiker, J.T.
      (2015) Biochem. J. 470: 357
    • Vaspin inhibits kallikrein 7 by serpin mechanism.
      Heiker, J.T.,Kloeting, N.,Kovacs, P.,Kuettner, E.B.,Strater, N.,Schultz, S.,Kern, M.,Stumvoll, M.,Blueher, M.,Beck-Sickinger, A.G.
      (2013) Cell. Mol. Life Sci. 70: 2569



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serpin A12
A, E
413Homo sapiensMutation(s): 0 
Gene Names: SERPINA12
Find proteins for Q8IW75 (Homo sapiens)
Go to Gene View: SERPINA12
Go to UniProtKB:  Q8IW75
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 60.392α = 90.00
b = 104.422β = 96.90
c = 62.965γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PHASERphasing
REFMACrefinement
XSCALEdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyCRC1052 (C4 and C7)
European UnionGermany--

Revision History 

  • Version 1.0: 2015-11-11
    Type: Initial release
  • Version 1.1: 2016-02-03
    Type: Database references
  • Version 1.2: 2017-09-06
    Type: Author supporting evidence