5EI0

Structure of RCL-cleaved vaspin (serpinA12)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.227 

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
  • Primary Citation of Related Structures:  
    5EI0

  • 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 inhibitory mechanism involving a cleavage of the reactive center loop between P1 (M378) and P1' (E379) ...

    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: 
    • 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
    • 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
    Organizational Affiliation: 

    State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serpin A12 A, E413Homo sapiensMutation(s): 0 
Gene Names: SERPINA12
Find proteins for Q8IW75 (Homo sapiens)
Explore Q8IW75 
Go to UniProtKB:  Q8IW75
NIH Common Fund Data Resources
PHAROS:  Q8IW75
GTEx:  ENSG00000165953
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.227 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.392α = 90
b = 104.422β = 96.9
c = 62.965γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
Aimlessdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data

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

Revision History  (Full details and data files)

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