Conformational flexibility of aspartame

Area of Science:

• Biochemistry
• Molecular Biology
• Computational Chemistry

Background:

• Aspartame, a widely used artificial sweetener, is a dipeptide ester with a unique structure-taste relationship.
• Its conformational flexibility has historically hindered its use as a lead compound for designing new sweeteners.
• Understanding aspartame's molecular structure is crucial for elucidating the sweet taste receptor's active site.

Purpose of the Study:

• To trace the evolution of understanding aspartame's 3D structural aspects.
• To explore the challenges posed by aspartame's flexibility in sweetener design.
• To review the progression from early conformational studies to modern computational modeling of aspartame-receptor interactions.

Main Methods:

• Review of early conformational analysis studies on aspartame.
• Analysis of computational modeling techniques, including molecular docking.
• Utilizing homology models of the sweet taste receptor for docking simulations.

Main Results:

• Early studies highlighted the significant conformational flexibility of aspartame.
• This flexibility complicated the use of aspartame's molecular model as a template for receptor site inference.
• Recent advancements allow docking aspartame into homology models of the sweet taste receptor, advancing structural insights.

Conclusions:

• The 3D structural properties of aspartame are key to its sweet taste.
• Overcoming the challenge of its conformational flexibility is essential for rational sweetener design.
• Computational approaches, like docking into receptor models, provide valuable insights into aspartame-sweet taste receptor interactions.