2ZV6

Crystal structure of human squamous cell carcinoma antigen 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of SCCA1 and insight about the interaction with JNK1

Zheng, B.Matoba, Y.Kumagai, T.Katagiri, C.Hibino, T.Sugiyama, M.

(2009) Biochem Biophys Res Commun 380: 143-147

  • DOI: 10.1016/j.bbrc.2009.01.057
  • Primary Citation of Related Structures:  
    2ZV6

  • PubMed Abstract: 
  • Squamous cell carcinoma antigen 1 (SCCA1), which belongs to serine proteinase inhibitor (serpin) superfamily, inhibits papain-like cysteine proteinase. Recently, it has been reported that SCCA1 acts not only as a proteinase inhibitor but also as an inhibitor of UV-induced apoptosis via suppression of the activity of c-Jun NH(2)-terminal kinase (JNK1) ...

    Squamous cell carcinoma antigen 1 (SCCA1), which belongs to serine proteinase inhibitor (serpin) superfamily, inhibits papain-like cysteine proteinase. Recently, it has been reported that SCCA1 acts not only as a proteinase inhibitor but also as an inhibitor of UV-induced apoptosis via suppression of the activity of c-Jun NH(2)-terminal kinase (JNK1). The present study determined the crystal structure of SCCA1, suggesting that the reactive center loop (RCL) of SCCA1, a recognition site of proteinase, is very flexible and located away form the main-body of SCCA1. We show that the inhibitory effect of SCCA1 on the kinase activity of JNK1 is lost when the RCL was truncated. Furthermore, we found that a mutant protein created by replacing one amino acid in RCL maintain the suppressive activity to JNK1, whereas the inhibitory effect to proteinase is obviously decreased.


    Organizational Affiliation

    Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical Sciences, Hiroshima University, Kasumi 1-2-3, Minami-Ku, Hiroshima 734-8551, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serpin B3A, B, C401Homo sapiensMutation(s): 0 
Gene Names: SERPINB3SCCASCCA1
UniProt & NIH Common Fund Data Resources
Find proteins for P29508 (Homo sapiens)
Explore P29508 
Go to UniProtKB:  P29508
PHAROS:  P29508
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29508
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 263.48α = 90
b = 263.48β = 90
c = 48.67γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement
BSSdata collection
HKL-2000data reduction
HKL-2000data scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance