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Golgi matrix proteins are a group of highly dynamic proteins that maintain the stacked structure of Golgi. These proteins adapt to rapid morphological changes of the Golgi during the cell cycle. During cell division, mild proteolysis removes these connections resulting in Golgi unstacking. In The daughter cells, these proteins help reassemble the unstacked Golgi.
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Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
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Ciliary subcompartments and cysto-proteins.

Takahiko Yokoyama1

  • 1Division of Developmental Biology, Department of Anatomy, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji, Kawara-machi, Kamigyo-ku, Kyoto, 602-8566, Japan. tyoko@koto.kpu-m.ac.jp.

Anatomical Science International
|October 2, 2015
PubMed
Summary

Renal cystic diseases involve cyst formation in nephrons, often linked to genetic mutations affecting ciliary proteins. Understanding cyst protein localization within cilia is key to unraveling renal cystogenesis mechanisms.

Keywords:
CiliaCiliopathyInv compartmentRenal cystTransition zone

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Area of Science:

  • Nephrology
  • Cell Biology
  • Genetics

Background:

  • Renal cystic diseases are characterized by fluid-filled cysts in nephrons, frequently associated with genetic factors.
  • Cyst-causing proteins (cysto-proteins) are often found in cilia and centrioles.
  • Cilia are implicated in renal cyst development, as evidenced by cyst formation in mutant mice lacking cilia.

Purpose of the Study:

  • To classify cysto-proteins based on their specific localization within distinct ciliary subcompartments.
  • To elucidate the relationships among cysto-proteins.
  • To identify the precise intraciliary functions of these proteins in the context of renal cystogenesis.

Main Methods:

  • Review of existing literature on renal cystic diseases and ciliary biology.
  • Classification of known cysto-proteins according to their localization within ciliary subcompartments.
  • Analysis of functional data related to cysto-proteins and ciliary subcompartments.

Main Results:

  • Cysto-proteins exhibit specific localization patterns within various ciliary subcompartments.
  • This classification provides a framework for understanding how different cysto-proteins interact.
  • Localization data suggests distinct roles for proteins in different parts of the cilium.

Conclusions:

  • The localization of cysto-proteins within ciliary subcompartments is crucial for understanding their function in renal cystogenesis.
  • A detailed understanding of intraciliary protein localization can reveal novel therapeutic targets for renal cystic diseases.
  • Further research into ciliary subcompartment functions is warranted to fully understand these complex genetic disorders.