Synthesis of heat-shock proteins in developing sea urchins.
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Biomedical subjects
M C Roccheri
Publications and source records attributed to M C Roccheri.
Heat shock proteins in sea urchin embryos. Territorial and intracellular location.
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Synthesis of "heat shock" proteins in sea urchin embryos.
Heating at 31 degrees C produces in sea urchin gastrulae a general and severe inhibition of the protein synthesis together with a marked increase in the rate of synthesis of one or very few classes of specific proteins.
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Archenteron cells are responsible for the increase in ribosomal RNA synthesis in sea urchin gastrulae.
Paracentrotus lividus embryos were continuously labeled with P32 from hatching blastula to pluteus. The archenteron cells were then separated from the rest of the embryo and the radioactivity accumulated into the ribosomal RNA of the two cell groups measured. The results clearly indicate that the bulk of ribosomal RNA is mainly if not entirely, synthesized in this time interval by the archenteron cells.
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Studies on the structure and possible function of the RNA "cap" in developing sea urchins.
Paracentrotus lividus embryos at the hatching blastula stage very quickly incorporate radioactivity from labeled nucleosides (except uridine) or 32P- or methyl-labeled methionine into a portion of the RNA that has been identified as a "cap". The most probable sequence of this cap is m7G (5') ppp (5')mAmpCp. A very active "capping" and methylation of the "cap" of preexisting RNA molecules was shown to occur at the blastula stage.
Animals↗
Studies on the regulation of ribosomal RNA synthesis in sea urchin development.
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