Functional amyloids as natural storage of peptide hormones in pituitary secretory granules.

Functional amyloids as natural storage of peptide hormones in pituitary secretory granules.
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DOI:
10.1126/science.1173155
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发表时间:
2009-07-17
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Riek R
Riek R
中科院分区:
其他
文献类型:
--
作者:
Maji SK;Perrin MH;Sawaya MR;Jessberger S;Vadodaria K;Rissman RA;Singru PS;Nilsson KP;Simon R;Schubert D;Eisenberg D;Rivier J;Sawchenko P;Vale W;Riek R

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淀粉样蛋白是高度组织化的富含交叉β-片层的蛋白质或肽聚集体,其与包括阿尔茨海默病和II型糖尿病在内的病理状况相关。然而,淀粉样蛋白也可能具有正常的生物学功能,如参与朊病毒复制的真菌朊病毒和参与哺乳动物皮肤色素沉着的淀粉样蛋白Pmel 17所证明的。在这里,我们表明,内分泌系统的分泌颗粒中的肽和蛋白质激素是以富含淀粉样交叉β-片层的构象储存的。因此,与淀粉样蛋白与疾病的原始关联相反,垂体和其他器官中的功能性淀粉样蛋白可以有助于正常的细胞和组织生理学。
Amyloids are highly organized cross β-sheet-rich protein or peptide aggregates that are associated with pathological conditions including Alzheimer’s disease and type II diabetes. However, amyloids may also have a normal biological function as demonstrated by fungal prions, which are involved in prion replication, and the amyloid protein Pmel17, which is involved in mammalian skin pigmentation. Here, we show that peptide and protein hormones in secretory granules of the endocrine system are stored in an amyloid-like cross β-sheet-rich conformation. Thus, in contrast to the original association of amyloids with diseases, functional amyloids in the pituitary and other organs can contribute to normal cell and tissue physiology.
生产阿尔茨海默氏病的β-淀粉样蛋白肽的替代途径。
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