The 300-kDa intermediate filament-associated protein (IFAP300) is a hamster plectin ortholog

Bryan H. Clubb, Ying Hao Chou, Harald Herrmann, Tatyana M. Svitkina, Gary G. Borisy, Robert D. Goldman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Plectin is a high-molecular-weight cytoskeleton-associated protein that was initially identified in intermediate filament (IF)-enriched fractions of rat C6 glioma cells. At the cellular level, plectin has been found to associate with IF networks and IF-associated structures that are involved in cell-cell and cell-substrate adhesions. IFAP300 is an IF-associated protein that was initially identified in hamster cells by a monoclonal antibody directed against a high molecular weight protein present in IF-enriched cytoskeletal preparations. Plectin and IFAP300 display similar distribution patterns within cells as determined by immunofluorescence. Based upon this and the finding that their biochemical properties are similar, it has been suggested that they may actually be orthologous proteins. In this paper we demonstrate that this is the case. Cloning and sequencing of most of the hamster plectin cDNA demonstrates that plectin is found in hamster cells and that its sequence is highly conserved between species. Using immunological crossreactivity, epitope mapping, and immunoelectron microscopy, we show that IFAP300 is actually the hamster ortholog of plectin. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)183-187
Number of pages5
JournalBiochemical and Biophysical Research Communications
Issue number1
StatePublished - Jun 24 2000


  • Cytoskeleton
  • Intermediate filament-associated protein
  • Plectin

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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