Membrane Carriers Structure and Functions | Cell Biology Transport Proteins
Get ready for an exciting dive into the world of membrane carriers in our latest cell biology video!
Discover the fascinating mechanisms of action that underlie these essential proteins, explore the different types of membrane carriers, and learn about their real-world clinical applications. From uniporters to symporters and antiporters, we cover it all.
So, join us for a captivating exploration of membrane carriers that you won't want to miss!
▬ 🕘 Timestamps
00:00 - Membrane carriers structure and functions
00:25 - Transport processes
02:09 - Cell membrane
03:13 - Cell transport proteins
03:57 - Membrane carriers
06:30 - Link to video lectures on sqadia.com
▬ 📌 Membrane Carriers-Mechanism of Action
Membrane carriers are a class of proteins that transport molecules and ions across cell membranes. When a molecule or ion binds to the carrier, it triggers a change in the protein's shape, which allows the molecule to be transported across the membrane. This change in shape can be induced by various mechanisms, including the binding of ions, changes in pH, or the binding of other molecules.
The different types of membrane carriers are:
🔵 Uniporters
🔵 Symporters
🔵 Antiporters or Exchangers
▬ 📌 Uniporters
Uniporters are like tiny molecular gates, that sit on the surface of cells and are responsible for the transport of a single type of molecule or ion across the cell membrane. They're highly specific and select only one type of molecule to transport at a time. This reaction is also called facilitated diffusion.
An example of uniporters that has been discussed in detail in the video is:
🟡 Glucose transporters (GLUT-1)
▬ 📌 Symporters
Symporters transport two different types of molecules or ions across a cell membrane at the same time in the same direction. These are also known as co-transporters. One solute moves by facilitated diffusion, while the other one moves against its concentration gradient by the secondary active transport. Common examples of symporters include:
🟢 Na+/ Glucose Cotransporter
🟢 Na+/K+/2Cl- Cotransporter
▬ 📌 Antiporters or Exchangers
Antiporters transport two different types of molecules or ions across a cell membrane at the same time but in the opposite direction. These are also known as counter-transporters or exchangers.
⚫️ Na+/Ca2+ Exchanger
⚫️ Na+/H+ Exchanger
These are just the main points covered in the video. It is recommended that you watch the entire video to learn about all of these carriers in depth and their clinical relevance.
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