Thank you for making me so wonderfully complex!
Psalm 139:14 NLT
"Researchers from Weill Cornell Medicine led by Dr. Samie Jaffrey found another signaling system that predetermines how much protein a transcribed gene should generate.
Here's how it works. At the 5' end of a messenger RNA transcript, there's a "cap" region. This cap
region was previously thought just to provide a docking structure when the mRNA enters the ribosome, but it turns out that it can also hold information. If the cap has an adenine base (the A in the genetic code), the adenine with its attached sugar ribose (adenosine) can hold up to two methyl groups, which are tags made up of CH3. If the adenosine has one methyl group, it is called m6a. If it has two, it's called m6am. This provides a signaling system for the cell. Think "one if by land, two if by sea."
Another player is involved in this coding scheme. It's called FTO ("fat mass and obesity associated protein"). This enzyme can remove methyl groups from the cap adenosines, but it mostly goes after the doubly methylated m6am forms. Because of this, FTO regulates the stability of mRNAs. The Cornell team found that FTO was 100 times more likely to remove a methyl tag from m6am than from m6a.
And then there's another player: DCP2. This enzyme "decaps" mRNAs, facilitating their degradation. Once decapped, mRNAs are degraded by micro-RNAs. The m6am RNAs, however, are more resistant to decapping by DCP2. This new epigenetic code helps explain why some mRNAs are more robust against degradation than others.
Why is this important? Without this signaling system, bad things can happen!" EN&V
Psalm 139:14 NLT
"Researchers from Weill Cornell Medicine led by Dr. Samie Jaffrey found another signaling system that predetermines how much protein a transcribed gene should generate.
Here's how it works. At the 5' end of a messenger RNA transcript, there's a "cap" region. This cap
region was previously thought just to provide a docking structure when the mRNA enters the ribosome, but it turns out that it can also hold information. If the cap has an adenine base (the A in the genetic code), the adenine with its attached sugar ribose (adenosine) can hold up to two methyl groups, which are tags made up of CH3. If the adenosine has one methyl group, it is called m6a. If it has two, it's called m6am. This provides a signaling system for the cell. Think "one if by land, two if by sea."Another player is involved in this coding scheme. It's called FTO ("fat mass and obesity associated protein"). This enzyme can remove methyl groups from the cap adenosines, but it mostly goes after the doubly methylated m6am forms. Because of this, FTO regulates the stability of mRNAs. The Cornell team found that FTO was 100 times more likely to remove a methyl tag from m6am than from m6a.
And then there's another player: DCP2. This enzyme "decaps" mRNAs, facilitating their degradation. Once decapped, mRNAs are degraded by micro-RNAs. The m6am RNAs, however, are more resistant to decapping by DCP2. This new epigenetic code helps explain why some mRNAs are more robust against degradation than others.
Why is this important? Without this signaling system, bad things can happen!" EN&V
