Anonymous asked in Science & MathematicsBiology · 1 month ago

How do the side chains on Amino Acids help with their functions?

The amino acids tyrosine, threonine and serine all have side chains which

contain hydroxyl groups. Explain why this feature makes these amino acid

residues important in the regulation of metabolism, cell growth and

cell differentiation. 

1 Answer

  • 1 month ago

    Those side chains can all be reversibly phosphorylated and dephosphorylated. The addition or removal of  phosphate groups induces conformation changes in the proteins that can act as switches to activate or inactivate the protein. Many aspects of cell signaling employ these reversible phosphorylation events in their regulation. 

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