Modulating Mobility: a Paradigm for Protein Engineering?

Area of Science:

• Biochemistry
• Structural Biology
• Protein Dynamics

Background:

• Proteins exhibit significant mobility beyond conformational changes, including constant thermal motion.
• Protein mobility varies across the structure and is influenced by factors like ligand binding.
• This intrinsic mobility is vital for critical protein functions such as catalysis, allostery, cooperativity, and regulation.

Purpose of the Study:

• To highlight the importance of an optimal dynamic state in proteins, complementing optimal structure.
• To propose protein engineering strategies focused on modulating protein dynamics.
• To explore the potential of engineering active site mobility for applications like increasing enzyme promiscuity.

Main Methods:

• Utilizing molecular dynamics simulations.
• Incorporating experimental data.
• Combining computational and experimental approaches.

Main Results:

• Protein mobility is a key determinant of protein function.
• Alterations in protein dynamics, even at distant sites, can impair function, as seen in metabolic diseases.
• Engineering active site mobility is a feasible strategy.

Conclusions:

• An optimal dynamic state is as important as an optimal structure for protein function.
• Rational modification of active site mobility represents a novel paradigm in protein engineering.
• This approach can be integrated with traditional methods to enhance enzyme properties.