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Phosphatidylserine (abbreviated Ptd-L-Ser or PS) is a phospholipid and is a component of the cell membrane. [1] It plays a key role in cell cycle signaling, specifically in relation to apoptosis . It is a key pathway for viruses to enter cells via apoptotic mimicry . [ 2 ]
The most well characterised eat-me signal is the phospholipid phosphatidylserine. Healthy cells do not expose phosphatidylserine on their surface, whereas dead, dying, infected, injured and some activated cells expose phosphatidylserine on their surface in order to induce phagocytes to phagocytose them.
PtdCho - Phosphatidylcholine; PtdEtn - Phosphatidylethanolamine; PtdIns - Phosphatidylinositol; PtdSer - Phosphatidylserine. Membrane lipids are a group of compounds (structurally similar to fats and oils) which form the lipid bilayer of the cell membrane. The three major classes of membrane lipids are phospholipids, glycolipids, and cholesterol.
They contain natural ingredients like Bacopa monnieri, Ginkgo biloba and phosphatidylserine, which are well-known for their memory-enhancing properties. Additionally, they also help reduce mental ...
Phosphatidylserine is translocated to the exoplasmic leaflet by the activation of scramblases, leading to pro-coagulant properties and providing a phagocytic signal to the macrophages that engulf and clear the apoptotic cells. The involvement of other associated proteins aiding scrambling activity cannot be ruled out.
The phosphatidylserine decarboxylation pathway is the main source of synthesis for phosphatidylethanolamine in the membranes of the mitochondria. Phosphatidylethanolamine produced in the mitochondrial membrane is also transported throughout the cell to other membranes for use.
For example, phosphatidylserine is an "eat-me" signal that, when exposed on the surface of a cell, triggers phagocytes (i.e. cells that eat other cells) to eat that cell. Phosphatidylserine is normally found on the inside of healthy cells, but can become exposed on the surface of dying, activated or stressed cells.
PEOPLE spoke with the directors behind Netflix's new docuseries 'Aaron Rodgers: Enigma,' which began streaming Tuesday