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A new splice variant of glial fibrillary acidic protein, GFAP epsilon, interacts with the presenilin proteins.

We describe a new human isoform, GFAP epsilon, of the intermediary filament protein GFAP (glial fibrillary acidic protein). GFAP epsilon mRNA is the result of alternative splicing and a new polyadenylation signal, and thus GFAP epsilon has a new C-terminal protein sequence. This provides GFAP epsilon with the capacity for specific binding of presenilin proteins in yeast and in vitro. Our observations suggest a direct link between the presenilins and the cytoskeleton where GFAP epsilon is incorporated. Mutations in GFAP and presenilins are associated with Alexander disease and Alzheimer's disease, respectively. Accordingly, GFAP epsilon should be taken into consideration when studying neurodegenerative diseases.

Pubmed ID: 12058025

Authors

  • Nielsen AL
  • Holm IE
  • Johansen M
  • Bonven B
  • Jørgensen P
  • Jørgensen AL

Journal

The Journal of biological chemistry

Publication Data

August 16, 2002

Associated Grants

None

Mesh Terms

  • Alternative Splicing
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • DNA, Complementary
  • Exons
  • Glial Fibrillary Acidic Protein
  • Humans
  • Membrane Proteins
  • Molecular Sequence Data
  • Presenilin-1
  • Presenilin-2
  • Protein Binding
  • Saccharomyces cerevisiae
  • Sequence Homology, Amino Acid
  • Sequence Homology, Nucleic Acid