Lipid species affect morphology of endoplasmic reticulum: a sea urchin oocyte model of reversible manipulation
نویسندگان
چکیده
منابع مشابه
Characterization of sea urchin egg endoplasmic reticulum in cortical preparations.
The cortical endoplasmic reticulum (ER) of sea urchin eggs was localized on isolated egg cortices by staining with aqueous suspensions of the dicarbocyanine "DiI." Immunofluorescence localization of a calsequestrin-like protein was essentially identical; this is consistent with a role for the ER in calcium regulation. The ER often encircles cortical granules, making it well-suited for initiatin...
متن کاملSperm-oocyte interaction in the sea-urchin.
A study was made of the electrical and morphological changes in the sea-urchin oocyte during interaction with spermatozoa. The first event, a small step depolarization accompanied by a 20-40% decay in input resistance occurs within seconds of attachment. The evidence suggests that this electrical event is the result of sperm-oocyte fusion, and that the ion channels that lower the resistance acr...
متن کاملOrganization of the sea urchin egg endoplasmic reticulum and its reorganization at fertilization
The ER of eggs of the sea urchin Lytechinus pictus was stained by microinjecting a saturated solution of the fluorescent dicarbocyanine DiIC18(3) (DiI) in soybean oil; the dye spread from the oil drop into ER membranes throughout the egg but not into other organelles. Confocal microscopy revealed large cisternae extending throughout the interior of the egg and a tubular membrane network at the ...
متن کاملDynamics of the endoplasmic reticulum and golgi apparatus during early sea urchin development.
The endoplasmic reticulum (ER) and Golgi were labeled by green fluorescent protein chimeras and observed by time-lapse confocal microscopy during the rapid cell cycles of sea urchin embryos. The ER undergoes a cyclical microtubule-dependent accumulation at the mitotic poles and by photobleaching experiments remains continuous through the cell cycle. Finger-like indentations of the nuclear envel...
متن کاملDemonstration of calcium uptake and release by sea urchin egg cortical endoplasmic reticulum
The calcium indicator dye fluo-3/AM was loaded into the ER of isolated cortices of unfertilized eggs of the sea urchin Arbacia punctulata. Development of the fluorescent signal took from 8 to 40 min and usually required 1 mM ATP. The signal decreased to a minimum level within 30 s after perfusion with 1 microM InsP3 and increased within 5 min when InsP3 was replaced with 1 mM ATP. Also, the flu...
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ژورنال
عنوان ژورنال: Journal of Lipid Research
سال: 2019
ISSN: 0022-2275
DOI: 10.1194/jlr.ra119000210