Ca2+-transport in sea urchin unfertilized eggs: regulation by endogenous sulfated polysaccharides and K+.

@article{LandeiraFernandez2006Ca2transportIS,
  title={Ca2+-transport in sea urchin unfertilized eggs: regulation by endogenous sulfated polysaccharides and K+.},
  author={Ana Maria Landeira-Fernandez and Rafael S. Aquino and Paulo A. S. Mour{\~a}o and Leopoldo de Meis},
  journal={Biochimica et biophysica acta},
  year={2006},
  volume={1760 10},
  pages={1529-35}
}
Previous data from our laboratory showed that the reticulum of the sea cucumber smooth muscle body wall retains both a sarco/endoplasmic reticulum Ca(2+)-ATPase (SERCA) and a sulfated polysaccharide. In this invertebrate, the transport of Ca(2+) by the SERCA is naturally inhibited by these endogenous sulfated polysaccharides. The inhibition is reverted by K(+) leading to an enhancement of the Ca(2+) transport rate. We now show that vesicles derived from the endoplasmic reticulum of unfertilized… CONTINUE READING