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Related Concept Videos

What are Membranes?01:24

What are Membranes?

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A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries...
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
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Enlargement of the Plasma Membrane01:22

Enlargement of the Plasma Membrane

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Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
2.0K
Membrane Domains01:18

Membrane Domains

6.2K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
6.2K
Lipids as Anchors01:32

Lipids as Anchors

6.4K
In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains...
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Protein Glycosylation01:25

Protein Glycosylation

7.7K
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
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Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process
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Membrane Surface Modification and Functionalization.

Vivek Vasagar1, Mohammad K Hassan2, Majeda Khraisheh2

  • 1PPG Industries, 4325 Rosanna Drive, Allison Park, PA 15101, USA.

Membranes
|November 27, 2021
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Summary

Water scarcity is increasing globally. This study explores innovative water management strategies to address the growing demand for clean water resources.

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Area of Science:

  • Environmental Science
  • Water Resource Management

Background:

  • Growing global water scarcity necessitates advanced management solutions.
  • Limited freshwater availability impacts ecosystems and human populations.

Discussion:

  • Examining the effectiveness of various water conservation techniques.
  • Analyzing the socio-economic implications of water reuse and desalination.

Key Insights:

  • Identifying optimal strategies for sustainable water resource allocation.
  • Highlighting the critical role of policy in mitigating water stress.

Outlook:

  • Future research should focus on integrated water management frameworks.
  • Developing resilient water systems is crucial for long-term sustainability.