2ZV6

Crystal structure of human squamous cell carcinoma antigen 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.270 
  • R-Value Work: 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

  • 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 i ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serpin B3
A, B, C
401Homo sapiensMutation(s): 0 
Gene Names: SERPINB3 (SCCA, SCCA1)
Find proteins for P29508 (Homo sapiens)
Go to Gene View: SERPINB3
Go to UniProtKB:  P29508
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.190 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 263.480α = 90.00
b = 263.480β = 90.00
c = 48.670γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
BSSdata collection
HKL-2000data scaling
X-PLORrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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