Structure of native human neuroserpin

Experimental Data Snapshot

  • Resolution: 3.15 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

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This is version 1.2 of the entry. See complete history


Human neuroserpin: structure and time-dependent inhibition

Ricagno, S.Caccia, S.Sorrentino, G.Antonini, G.Bolognesi, M.

(2009) J Mol Biol 388: 109-121

  • DOI: https://doi.org/10.1016/j.jmb.2009.02.056
  • Primary Citation of Related Structures:  
    3F02, 3F5N

  • PubMed Abstract: 

    Human neuroserpin (hNS) is a protein serine protease inhibitor expressed mainly in the nervous system, where it plays key roles in neural development and plasticity by primarily targeting tissue plasminogen activator (tPA). Four hNS mutations are associated to a form of autosomal dominant dementia, known as familial encephalopathy with neuroserpin inclusion bodies. The medical interest in and the lack of structural information on hNS prompted us to study the crystal structure of native and cleaved hNS, reported here at 3.15 and 1.85 A resolution, respectively. In the light of the three-dimensional structures, we focus on the hNS reactive centre loop in its intact and cleaved conformations relative to the current serpin polymerization models and discuss the protein sites hosting neurodegenerative mutations. On the basis of homologous serpin structures, we suggest the location of a protein surface site that may stabilize the hNS native (metastable) form. In parallel, we present the results of kinetic studies on hNS inhibition of tPA. Our data analysis stresses the instability of the hNS-tPA complex with a dissociation half-life of minutes compared to a half-life of weeks observed for other serpin-cognate protease complexes.

  • Organizational Affiliation

    Department of Biomolecular Sciences and Biotechnology, CNR-INFM and CIMAINA, University of Milano, Via Celoria 26, 20133 Milan, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
407Homo sapiensMutation(s): 0 
Gene Names: SERPINI1PI12
UniProt & NIH Common Fund Data Resources
Find proteins for Q99574 (Homo sapiens)
Explore Q99574 
Go to UniProtKB:  Q99574
PHAROS:  Q99574
GTEx:  ENSG00000163536 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99574
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.15 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 171.796α = 90
b = 179.176β = 90
c = 248.263γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Refinement description