The protein p27BBP (alias eIF6) occurs in yeast and mammalian epithelial cells. It is essential for ribosome genesis and has also been implicated in the functionality of integrins and intermediate filaments. By immunoblot, we show that homogenized integument from Sepia officinalis (Cephalopoda, Mollusca) contains a protein with immunological properties that closely resemble those of p27BBP. We also demonstrate, by immunogold electron microscopy with an indirect immunoreaction technique on ultrathin sections of human skin and Sepia integument, that p27BBP is constantly present in both species in epithelial cells, fibroblasts, and muscle fibers. It is found in the vicinity of intermediate filaments, in nucleoli, along the internal wall of the nuclear membrane, and in association with desmosomes and hemidesmosomes and occasionally occurs extracellularly. Thus, the structure and function of p27BBP seem to have been highly conserved throughout evolution; the protein appears to be essential in eukaryotic cells in which it interacts with several ultrastructural components of diverse function.
Immunocytochemical localization of protein p27BBP in human skin and invertebrate (Sepia officinalis) integument / A. Bairati, S. Biffo, S. Corbetta, L.A. Sala. - In: CELL AND TISSUE RESEARCH. - ISSN 0302-766X. - 321:1(2005 Jul), pp. 115-121.
|Titolo:||Immunocytochemical localization of protein p27BBP in human skin and invertebrate (Sepia officinalis) integument|
BAIRATI, AURELIO (Corresponding)
BIFFO, STEFANO (Secondo)
SALA, LEONARDO (Ultimo)
|Parole Chiave:||human; immunocytochemistry; integument; p27bbp; sepia officinalis (mollusca); skin; aged; animals; carrier proteins; epithelial cells; eukaryotic initiation factors; fibroblasts; hela cells; humans; intermediate filament proteins; male; microscopy, confocal; microscopy, electron; mollusca; muscle fibers, skeletal; nuclear proteins; peroxidases; precipitin tests; skin; immunohistochemistry; anatomy; clinical biochemistry; cell biology|
|Settore Scientifico Disciplinare:||Settore BIO/06 - Anatomia Comparata e Citologia|
|Data di pubblicazione:||lug-2005|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/s00441-005-1123-7|
|Appare nelle tipologie:||01 - Articolo su periodico|