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Both the N-terminal fragment and the protein-protein interaction domain (PDZ domain) are required for the pro-apoptotic activity of presenilin-associated protein PSAP
Biochimica et biophysica acta (2008)
  • Guozhang Mao, University of Tennessee - Knoxville
  • Jianxin Tan, University of Tennessee - Knoxville
  • W Gao
  • Y Shi
  • Mei-Zhen Cui, University of Tennessee - Knoxville
  • Xuemin Xu, University of Tennessee - Knoxville
Abstract
Presenilin-associated protein (PSAP) was originally identified as a PS1-associated, PDZ domain protein. In a subsequent study, PSAP was found to be a mitochondrial apoptotic molecule. In this study, we cloned the PSAP gene and found that it is composed of 12 exons and localizes on chromosome 6. To better understand the structure and function of PSAP, we have generated a series of antibodies that recognize different regions of PSAP. Using these antibodies, we found that PSAP is expressed in four isoforms as a result of differential splicing of exon 8 in addition to the use of either the first or the second ATG codon as the start codon. We also found that all these isoforms are localized in the mitochondria and are pro-apoptotic. Furthermore, our data revealed that the PDZ domain and N-terminal fragment are required for the pro-apoptotic activity of PSAP.
Publication Date
April, 2008
Citation Information
Guozhang Mao, Jianxin Tan, W Gao, Y Shi, et al.. "Both the N-terminal fragment and the protein-protein interaction domain (PDZ domain) are required for the pro-apoptotic activity of presenilin-associated protein PSAP" Biochimica et biophysica acta Vol. 1780 Iss. 4 (2008)
Available at: http://works.bepress.com/mei_cui/5/