Lead-dependent deposits in diverse synaptic vesicles: suggestive evidence for the presence of anionic binding sites.

Lead-dependent deposits in diverse synaptic vesicles: suggestive evidence for the presence of anionic binding sites.
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不同突触小泡中的铅依赖性沉积物:阴离子结合位点存在的提示性证据。

DOI:
10.1002/neu.480180507
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发表时间:
1987
期刊:
Journal of neurobiology
影响因子:
--
通讯作者:
Holtzman,E
Holtzman,E
中科院分区:
--
文献类型:
--
作者:
Sulzer,D;Piscopo,I;Ungar,F;Holtzman,E

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我们观察到电子致密沉积取决于醛固定组织与铅离子在几种类型神经元的突触囊泡内的孵育,这些神经元在利用的神经递质和肾上腺髓质的分泌颗粒方面有所不同。显然,可以与铅离子相互作用的囊泡成分是广泛存在的。对沉积物的发生的一个合理解释是囊泡内存在阴离子结合位点。这将与其他生物化学、细胞化学和免疫细胞化学证据相一致,例如表明某些突触囊泡中存在硫酸化大分子。阴离子结合位点可以通过参与诸如Ca2+储存、pH梯度的稳定或渗透现象的控制等过程而发挥重要作用。
We have observed electron dense deposits dependent on incubation of aldehyde‐fixed tissues with lead ions within synaptic vesicles of several types of neurons that differ in the neurotransmitters utilized and in the secretory granules of the adrenal medulla. Evidently, vesicle components that can interact with lead ions are widespread. A plausible explanation for the occurrence of the deposits is the presence of anionic binding sites within the vesicles. This would agree well with other biochemical, cytochemical, and immunocytochemical evidence, such as that indicating the presence of sulfated macromolecules in certain synaptic vesicles. Anionic binding sites could play significant roles by participating in processes such as Ca2+storage, stabilization of pH gradients, or the control of osmotic phenomena.
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影响因子: --
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