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'''Molecular modelling''' encompasses all theoretical methods and computational techniques used to model or mimic the behavior of [[molecules]]. The techniques are used in the fields of [[computational chemistry]], [[drug design]], [[computational biology]] and [[materials science]] for studying molecular systems ranging from small chemical systems to large biological molecules and material assemblies. Molecular models typically include representations of atoms and their interactions and can vary in the level of complexity; they can range from simple models that consider only the [[molecular geometry]] and [[electrostatics]] to more sophisticated models that consider quantum effects.

==Overview==
Molecular modelling methods are used to calculate the structure and properties of molecules, including their interactions with other molecules. They can help predict chemical reactions, molecular structures, [[dynamics]] and surface interactions, which are crucial in the design of new drugs, materials, and for understanding biological processes. The primary goal of molecular modelling is to provide a detailed description of the molecular structure and guide the synthesis of new compounds for industrial, pharmaceutical, and biotechnological applications.

==Types of Molecular Modelling==
Molecular modelling can be broadly classified into two categories:

* '''Quantum Mechanics Methods''': These methods, which include [[ab initio]] and [[density functional theory]] (DFT), are used to calculate the electronic structure of molecules. They are highly accurate but computationally demanding.
* '''Molecular Mechanics Methods''': These methods use force fields to model the physical interactions between atoms in a molecule. They are less computationally intensive and can be applied to larger systems.

==Applications==
Molecular modelling has a wide range of applications in various scientific fields. In [[drug discovery]], it is used to identify and optimize potential drug candidates. In [[materials science]], it helps in the design of new materials with desired properties. In [[biochemistry]] and [[molecular biology]], it is used to study the structure, function, and dynamics of biological macromolecules like proteins and nucleic acids.

==Software and Tools==
Several software tools and packages are available for molecular modelling, ranging from open-source to commercial. Examples include [[AMBER]], [[GROMACS]], [[Autodock]], and [[Gaussian]], each with its own strengths and suited for different types of modelling tasks.

==Challenges and Future Directions==
Despite its successes, molecular modelling faces challenges, such as the accurate prediction of molecular behavior in complex environments and the computational demands of simulating large systems. Advances in computational power, algorithms, and the development of hybrid methods combining quantum mechanics and molecular mechanics (QM/MM) are expected to address these challenges.

==See Also==
* [[Computational chemistry]]
* [[Drug design]]
* [[Computational biology]]
* [[Materials science]]

==References==
{{Reflist}}

[[Category:Computational chemistry]]
[[Category:Drug discovery]]
[[Category:Computational biology]]
[[Category:Materials science]]
{{medicine-stub}}

Molecular modelling - Revision history

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