AMBER/PBSA: An Open-Source Computer Program for Accurate and Scalable Solvation A

AMBER/PBSA：用于精确且可扩展求解的开源计算机程序 A

• 批准号: 8052808
• 负责人: RAY LUO
• 金额: $ 25.98万
• 依托单位: UNIVERSITY OF CALIFORNIA-IRVINE
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2014-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8052808
• 关键词: Algorithms; Area; Binding Proteins; Biological Models; Bypass; Charge; Communities; Complex; Computer software; Development; Drug Design; Drug Formulations; Electrostatics; Equation; Equilibrium; Evaluation; Event; Goals; Lead; Maintenance; Maps; Mediating; Methods; Modeling; Molecular; Molecular Models; Performance; Play; Right-On; Role; Series; Solutions; Solvents; Source; Structure; Surface; System; Validation; Water; Work; base; computer program; data structure; electric field; enzyme mechanism; improved; molecular modeling; novel; open source; parallel computing; particle; programs; protein folding; protein misfolding; protein structure prediction; public health relevance; reconstruction; salt water environment; self assembly; simulation; software development; solute

DESCRIPTION (provided by applicant): The goal of this project is to continue the development and maintenance of the AMBER/PBSA program for the solvation-mediated energetics and dynamics analysis of complex biomolecular systems. Biomolecules normally function in a salt-water environment, which has a strong effect on their structure and function. Water has a dielectric constant of about 80, whereas the dielectric constant of biomolecular interior is as low as 2. This leads to favorable interactions between atomic charges and the high-dielectric water. On the other hand, the high-dielectric water screens or reduces interactions among atomic charges. Water also gives rise to the hydrophobic effect, the tendency of water molecules to drive nonpolar solutes together. This promotes the self-assembly of biomolecules or association of nonpolar surfaces between different biomolecules. These solvation effects are often modeled with the implicit solvation methods for high-performance energetics and dynamics analysis of biomolecules. The widely used AMBER/PBSA program is an open-source computer program for implicit solvation treatments of biomolecules. In this project, we propose to improve the AMBER/PBSA program by incorporating advanced numerical algorithms and expanding its functionalities on readily available serial and parallel computing platforms. We propose to implement novel algorithms to achieve a better balance between accuracy and efficiency, develop new post-analysis methods for more robust modeling of biomolecular dynamics, and explore new dielectric models for more physical treatments of implicit solvation. Finally, we will continue our rigorous validation of implicit solvents and extend software interface to attract more users. PUBLIC HEALTH RELEVANCE: Solvation plays an important role in all basic biomolecular events and therefore is integral to the modeling of biomolecular structure and function. This application intends to continue the development of a general molecular modeling software for accurate and scalable treatment of solvation. The developed software module will be used to study the relation between structure, dynamics, and function of biomolecules, which is crucial for rational drug design.

项目描述（由申请人提供）：该项目的目标是继续开发和维护AMBER/PBSA项目，用于复杂生物分子体系的溶剂化介导的能量学和动力学分析。生物分子通常在咸水环境中发挥作用，咸水环境对生物分子的结构和功能有很大的影响。水的介电常数约为80，而生物分子内部的介电常数低至2。这导致原子电荷和高介电水之间有利的相互作用。另一方面，高介电水屏蔽或减少原子电荷之间的相互作用。水也引起疏水效应，即水分子驱使非极性溶质聚集的趋势。这促进了生物分子的自组装或不同生物分子之间的非极性表面的结合。这些溶剂化效应通常用隐式溶剂化方法建模，用于生物分子的高性能能量学和动力学分析。广泛使用的AMBER/PBSA程序是一个用于隐式溶剂化处理生物分子的开源计算机程序。在这个项目中，我们建议通过结合先进的数值算法和扩展其在现成的串行和并行计算平台上的功能来改进AMBER/PBSA程序。我们建议实施新的算法，以实现准确性和效率之间的更好平衡，开发新的后分析方法，以建立更稳健的生物分子动力学模型，并探索新的介电模型，以进行更多的隐式溶剂化物理处理。最后，我们将继续对隐式溶剂进行严格的验证，并扩展软件接口以吸引更多的用户。