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Related Concept Videos

Golgi Matrix Proteins01:12

Golgi Matrix Proteins

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.
One of the first identified Golgi matrix proteins was GM130, a rod-like protein located in the cis-Golgi. Subsequently, many Golgi...
Golgi Apparatus01:49

Golgi Apparatus

As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.
Golgi Apparatus01:09

Golgi Apparatus

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.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
Golgi Apparatus01:09

Golgi Apparatus

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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Plant Cell Wall02:43

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The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.
Coat Assembly and GTPases01:33

Coat Assembly and GTPases

Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...

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Related Experiment Video

Updated: May 27, 2026

Quantitative Localization of a Golgi Protein by Imaging Its Center of Fluorescence Mass
13:08

Quantitative Localization of a Golgi Protein by Imaging Its Center of Fluorescence Mass

Published on: August 10, 2017

A PLA1-2 punch regulates the Golgi complex.

Marie E Bechler1, Paul de Figueiredo, William J Brown

  • 1Department of Molecular Biology & Genetics, Cornell University, Ithaca, NY 14853, USA.

Trends in Cell Biology
|December 2, 2011
PubMed
Summary
This summary is machine-generated.

Four cytoplasmic phospholipase A (PLA) enzymes regulate membrane trafficking and structure in the Golgi complex and ER-Golgi intermediate compartment (ERGIC). Three PLA enzymes induce membrane tubule formation, impacting cellular function.

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Visualization and Quantification of Endogenous Intra-Organelle Protein Interactions at ER-Mitochondria Contact Sites by Proximity Ligation Assays

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • The Golgi complex, trans Golgi network (TGN), and ER-Golgi intermediate compartment (ERGIC) are crucial for membrane trafficking and maintaining cellular architecture.
  • These organelles consist of membrane cisternae, coated vesicles, and tubules.

Purpose of the Study:

  • To review the current understanding of how four cytoplasmic phospholipase A (PLA) enzymes regulate Golgi and ERGIC morphology and function.
  • To highlight the roles of cPLA(2)α, PAFAH Ib, iPLA(2)-β, and iPLA(1)γ in membrane trafficking.

Main Methods:

  • Literature review of studies investigating PLA enzymes and their effects on Golgi and ERGIC.
  • Analysis of evidence for functional redundancy between PAFAH Ib and cPLA(2)α.
  • Examination of the impact of PLA enzymes on membrane tubule formation.

Main Results:

  • Four cytoplasmic PLA enzymes (cPLA(2)α, PAFAH Ib, iPLA(2)-β, and iPLA(1)γ) were identified as regulators of Golgi and ERGIC.
  • PAFAH Ib and cPLA(2)α show some functional redundancy in regulating membrane trafficking.
  • PAFAH Ib, cPLA(2)α, and iPLA(2)-β induce membrane tubule formation, affecting Golgi structure and function.

Conclusions:

  • Cytoplasmic PLA enzymes play significant roles in regulating membrane trafficking and morphology within the Golgi complex and ERGIC.
  • Specific PLA enzymes are key in inducing membrane tubule formation, essential for organelle function.
  • Further research is needed to fully elucidate the complex regulatory mechanisms involving PLA enzymes in cellular membrane dynamics.