改进pKa预测与修复参数化的力场和自由能量计算
Carter J Wilson1, Vytautas Gapsys1,2, Bert L de Groot1
1Computational Biomolecular Dynamics Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen 37077, Germany.
Journal of chemical theory and computation
|April 2, 2025
概括
准确预测氨酸和氨酸pKa值对于药物设计至关重要. 没有平衡的自由能量计算,与修改的力场,显著提高这些关键氨基酸的pKa预测准确性.
科学领域:
- 计算化学是一种计算化学.
- 生物分子建模模型
- 药物发现 药物发现
背景情况:
- 向共价抑制剂在药物设计中越来越重要.
- 准确预测氨基酸pKa值,特别是氨酸和氨酸,对于理解蛋白质反应性和设计有效的抑制剂至关重要.
- 现有的pKa预测方法在准确性和速度方面存在局限性.
研究的目的:
- 开发和验证一种计算方法,用于准确预测氨酸和氨酸残留物的pKa值.
- 确定分子力学力场的关键修改,以提高pKa预测的准确性.
- 为了证明不平衡的自由能量计算在药物设计中探测残留物反应性的实用性.
主要方法:
- 使用不平衡的自由能量计算来确定pKa值.
- 研究了对CHARMM36m和Amber14SB力场的特定修改的影响,包括对范德瓦尔斯半径,骨干电荷和部分电荷的调整.
- 对实验数据进行验证的预测.
主要成果:
- 不平衡的自由能量计算准确地预测了cysteine和histidine的pKa值,超过了传统方法.
- 包括增加硫范德瓦尔斯半径 (氨酸),改变骨干电荷 (histidine) 和缩小部分电荷 (两者) 的修改显著提高了准确性.
- 使用修改的CHARMM36m力场将预测误差从2.12 ± 0.27 pKa减少到1.28 ± 0.15 pKa,并将与实验的相关性从0.25 ± 0.09提高到0.58 ± 0.08.
- 经过修改的Amber14SB力场将误差从3.21 ± 0.29 pKa降低到1.69 ± 0.23 pKa,并将相关性从0.15 ± 0.10提高到0.36 ± 0.10.
结论:
- 无平衡的自由能量计算提供了一个强大而准确的方法来预测氨酸和氨酸的pKa值.
- 特定的力场修改对于实现高预测准确性至关重要,有助于合理设计向的共价抑制剂.
- 这种方法为计算化学和药物发现领域的研究人员提供了有价值的工具,他们希望了解和调节蛋白质活性.
更多相关视频
06:05The Participant-Reported Implementation Update and Score PRIUS: A Novel Method for Capturing Implementation-Related Data Over Time
Published on: February 19, 2021
1.2K
10:02Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection
Published on: February 18, 2014
8.9K
相关概念视频
01:21Methods of Documentation III: PIE
1.3K
Problem-intervention-evaluation (PIE) is a systematic approach to documentation used in healthcare settings for clinical decision-making and patient care planning. It is a structured approach to organizing patient data based on problems, interventions, and evaluations. Here's a breakdown of its key features and considerations:
1.3K
01:26Methods of Documentation II: POMR
863
The Problem-Oriented Medical Record (POMR) revolutionized medical record-keeping by introducing a systematic approach focusing on the patient's problems rather than merely listing symptoms. Dr. Lawrence Weed's introduction of this method in the 1960s marked a significant advancement in medical documentation. The POMR framework consists of four key components: the database, problem list, plan of care, and progress notes.
863
01:25Pulmonary Function Tests
277
Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
277
01:28Pneumonia IV: Management
271
The treatment of pneumonia varies based on its severity and the causative pathogen. Here is a structured approach to managing pneumonia, integrating pharmaceutical and supportive care strategies.
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
271
01:30Pneumonia V: Nursing management and Prevention
1.7K
Nursing management of pneumonia involves promoting airway patency, facilitating rest and conserving energy, encouraging fluid intake, maintaining nutrition, and educating patients.
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed....
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed....
1.7K
01:28Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors
104
Phosphodiesterase 5 (PDE5) inhibitors are potent enzymes that function to hydrolyze cyclic nucleotides to their corresponding 5' monophosphates. Their unique biochemical properties have been applied in treating Pulmonary Arterial Hypertension (PAH).
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
104