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Studies on heat shock proteins in sea urchin development
Author(s) -
Giudice Giovanni,
Sconzo Gabriella,
Roccheri Maria Carmela
Publication year - 1999
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1046/j.1440-169x.1999.00450.x
Subject(s) - blastula , sea urchin , heat shock protein , microbiology and biotechnology , hsp70 , biology , embryo , cell division , shock (circulatory) , embryogenesis , cell , genetics , gene , medicine , gastrulation
Work on stress proteins in sea urchin embryos carried out over the last 20 years is reviewed and the following major results are described. Entire sea urchin embryos, if subjected to a rise in temperature at any postblastular stage undergo a wave of heat shock protein (hsp) synthesis and survive. If subjected to the same rise between fertilization and blastula formation, they are not yet able to synthesize hsp and die. Four clones coding for the major hsp, hsp70, have been isolated and sequenced; evidence for the existence of a heat shock factor has been provided, and a mechanism for the developmental regulation of hsp synthesis discussed. Intra‐ embryonic and intracellular hsp location has been described; and a mechanism for achievement of thermotolerance proposed. A chaperonine role for a constitutive mitochondrial hsp56 has been suggested, as well as a role for the constitutive hsp70 in cell division. Heat shock, if preceded by 12‐O‐tetradecanoylphorbol‐12‐acetate (TPA) treatment causes apoptosis.