Structure of RCL-cleaved vaspin (serpinA12)

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.227 

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This is version 1.3 of the entry. See complete history


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: https://doi.org/10.1515/hsz-2015-0229
  • Primary Citation of Related Structures:  

  • 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). 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serpin A12A,
B [auth E]
413Homo sapiensMutation(s): 0 
Gene Names: SERPINA12
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IW75 (Homo sapiens)
Explore Q8IW75 
Go to UniProtKB:  Q8IW75
GTEx:  ENSG00000165953 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IW75
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • 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
XDSdata reduction
XSCALEdata scaling
Aimlessdata scaling

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
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Refinement description