Journal of molecular graphics & modelling最新文献_第6页

Density functional modelling of lead-free Sn-based AmSnX3 (Am=Rb, Cs; X=Cl, Br, I) perovskites as sustainable materials for optoelectronics and solar cell applications 无铅sn基AmSnX3 （Am=Rb, Cs； X=Cl, Br， I）钙钛矿作为光电子和太阳能电池应用的可持续材料的密度泛函建模

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-18 DOI: 10.1016/j.jmgm.2025.109227

Zia ur Rehman , Ayesha Saddiqa , A.F. Abd El-Rehim , Amna Parveen , Heba Y. Zahran , Zeesham Abbas

This research uses density functional theory to examine the structural, electronic, optical, mechanical, thermodynamic, thermoelectric, magnetic, and photovoltaic properties of Sn-based AmSnX₃ (Am = Rb, Cs; X = Cl, Br, I) perovskites. The tolerance factor (0.71–1.04) and the negative cohesive energy confirm the materials’ structural and thermodynamic stability. The electronic properties show semiconducting behavior, with energy band gaps of 0.42 eV for RbSnBr3 and 1.02 eV for CsSnCl₃. The maximum absorption values (7.16 × 10⁴ cm⁻¹ to 8.11 × 10⁴ cm⁻¹) in the visible region indicate efficient light harvesting for solar cell applications. Mechanical properties suggest mechanical stability and ductility. The Debye temperature (146.08–190.78 K) offers insights into heat capacity and thermal behavior at different temperatures. The Seebeck coefficient at room temperature classifies RbSnBr₃, RbSnI₃, and CsSnCl₃ as p-type materials, while RbSnCl₃, CsSnBr₃, and CsSnI₃ are n-type. The calculated power conversion efficiencies, from 12.47 % for CsSnI₃ to 29.54 % for CsSnCl₃, emphasize the novelty of this work, which combines structural, mechanical, electronic, and optical analyses for the first time to thoroughly evaluate the potential of RbSnX₃ and CsSnX₃ perovskites in optoelectronic and energy applications.

本研究利用密度泛函理论研究了sn基AmSnX3 （Am = Rb, Cs; X = Cl, Br， I）钙钛矿的结构、电子、光学、机械、热力学、热电、磁性和光伏性能。公差系数（0.71-1.04）和负内聚能证实了材料的结构和热力学稳定性。RbSnBr3的能带隙为0.42 eV， CsSnCl3的能带隙为1.02 eV。可见光区的最大吸收值（7.16 × 104 cm-1至8.11 × 104 cm-1）表明太阳能电池应用的有效光收集。机械性能表明机械稳定性和延展性。德拜温度（146.08-190.78 K）提供了不同温度下的热容量和热行为的见解。室温下的塞贝克系数将RbSnBr3、RbSnI3和CsSnCl3归类为p型材料，而RbSnCl3、CsSnBr3和CsSnCl3归类为n型材料。计算的功率转换效率，从12.47%的cssn3到29.54%的CsSnCl3，强调了这项工作的新颖性，首次将结构，机械，电子和光学分析结合起来，全面评估了RbSnX3和CsSnX3钙钛矿在光电和能源应用中的潜力。

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引用次数: 0

Tailoring adsorption properties of Kekulene nanoring via functionalization for pharmaceutical pollutant removal 基于功能化的克库林纳米环对药物污染物去除的裁剪吸附性能。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-18 DOI: 10.1016/j.jmgm.2025.109231

Hazem Abdelsalam , Mohamed Abdel Rafea , Mahmoud A.S. Sakr , Qinfang Zhang

Pharmaceutical pollutants such as Diclofenac and Naproxen are emerging environmental contaminants due to their persistence and potential biological hazards. In this study, pristine and functionalized Kekulene nanorings (KNRs) were theoretically explored as novel adsorbents using density functional theory (DFT). Various functional groups (–COOH, –NO₂, –NO, –N, –O, –S) were introduced to modulate the interaction with drug molecules. Adsorption energy (E_a) calculations confirmed spontaneous physisorption across all systems, with values ranging from −2.473 to −0.441 eV. Notably, the KNR–NO₂–N system in aqueous phase exhibited the lowest E_a (−0.441 eV) and shortest recovery time (τ = 2.864 × 10⁻⁵ s), making it the most promising candidate for rapid desorption and recyclability. Non-covalent interaction (NCI) analysis revealed that van der Waals forces and weak electrostatic interactions dominate the adsorption mechanism. Natural Bond Orbital (NBO) analysis of the oxygen atom (O6) confirmed variable charge transfer behaviour, reflecting the influence of surface functionalization. HOMO–LUMO analysis showed frontier orbital localization patterns that shifted upon functionalization, especially in Naproxen complexes, indicating enhanced electronic interactions. Compared to benchmark materials such as PTX@rGO and FPV@GN, KNR-based adsorbents demonstrated competitive or superior tunability and desorption potential. These results suggest that functionalized KNRs—particularly KNR–NO₂–N—are promising candidates for efficient, reversible pharmaceutical pollutant capture in both gas and aqueous environments.

药物污染物如双氯芬酸和萘普生由于其持久性和潜在的生物危害是新兴的环境污染物。本研究利用密度泛函理论（DFT）从理论上探讨了原始和功能化的Kekulene纳米颗粒作为新型吸附剂的可行性。引入各种官能团（-COOH, -NO2, -NO, -N, -O, -S）来调节与药物分子的相互作用。吸附能（Ea）计算证实了所有体系的自发物理吸附，其值范围为-2.473至-0.441 eV。值得注意的是，水溶液中的KNR-NO2-N体系具有最低的Ea （-0.441 eV）和最短的回收时间（τ = 2.864 × 10-5 s），是最有希望快速解吸和可循环利用的候选体系。非共价相互作用（NCI）分析表明，范德华力和弱静电相互作用主导了吸附机理。氧原子（O6）的自然键轨道（NBO）分析证实了可变电荷转移行为，反映了表面功能化的影响。HOMO-LUMO分析显示，前沿轨道定位模式随着功能化而改变，特别是在萘普生配合物中，表明电子相互作用增强。与PTX@rGO和FPV@GN等基准材料相比，基于knr的吸附剂表现出竞争性或优越的可调节性和解吸潜力。这些结果表明功能化的knr -特别是knr - no2 - n -是在气体和水环境中高效、可逆的药物污染物捕获的有希望的候选者。

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引用次数: 0

Vanalyzer: an open-source tool for automated statistical analysis and continuous updating of vanadate-binding sites in the Protein Data Bank Vanalyzer：一个开源工具，用于自动统计分析和持续更新蛋白质数据库中的钒酸结合位点。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-17 DOI: 10.1016/j.jmgm.2025.109223

Alexander Trachtenberg, Barak Akabayov

The rapidly growing number of protein structures in the Protein Data Bank (PDB) offers opportunities to derive biological insights from proteins with common features. Taking advantage of this “big data” resource, we developed an automated open-source Python script designated “Vanalyzer” that performs statistical analysis on vanadate-binding sites across the PDB. Vanalyzer evaluates the structural properties of proteins containing vanadium-based oxyanions by comparing binding interfaces and geometries across a diverse array of proteins. Additionally, it allows a focused analysis on specific enzyme classes, facilitating direct comparisons between them. The newly developed tool will contribute to the understanding of vanadate recognition within protein binding sites and will serve as a valuable, up-to-date resource for analyzing both current and newly submitted vanadate structures in the PDB.

蛋白质数据库（PDB）中蛋白质结构数量的快速增长为从具有共同特征的蛋白质中获得生物学见解提供了机会。利用这个“大数据”资源，我们开发了一个自动化的开源Python脚本，名为“Vanalyzer”，用于对PDB上的钒酸盐结合位点进行统计分析。Vanalyzer通过比较多种蛋白质的结合界面和几何形状来评估含有钒基氧离子的蛋白质的结构特性。此外，它允许对特定酶类进行集中分析，促进它们之间的直接比较。新开发的工具将有助于理解蛋白质结合位点内的钒酸盐识别，并将作为分析PDB中当前和新提交的钒酸盐结构的有价值的最新资源。

引用次数: 0

Targeting HDAC3 dynamics: Allosteric role of Phe200 in inhibitor binding and breast cancer therapy 靶向HDAC3动力学：Phe200在抑制剂结合和乳腺癌治疗中的变构作用。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-17 DOI: 10.1016/j.jmgm.2025.109226

Erick Bahena-Culhuac , Rodolfo Daniel Ávila-Avilés , Martiniano Bello

Histone deacetylase 3 (HDAC3) is a key epigenetic regulator implicated in breast cancer progression and represents a promising therapeutic target. Here, we investigated 14 HDAC3–ligand complexes using molecular dynamics (MD) simulations and binding free energy calculations (MM/GBSA) to identify the determinants of inhibitor binding. Key residues consistently engaged across ligands included Gly132, His134–135, Phe144, Asp170, His172, Phe200, Asp259, Leu266, Gly296, Tyr298, and the catalytic Zn²⁺ ion. Among the compounds, domatinostat and entinostat exhibited the strongest affinities (ΔGbind ≈ −70 kcal/mol), in reasonable agreement with experimental data (r = 0.60). Both ligands also showed small Highest Occupied Molecular Orbital–Lowest Unoccupied Molecular Orbital (HOMO–LUMO) gaps, high softness, and elevated electrophilicity indices, providing chemical cues for the design of next-generation HDAC3 inhibitors. Notably, ligand binding stabilized regions surrounding Phe200 and Asn370, restricting the conformational flexibility required for enzymatic activation. This supports an allosteric inhibition mechanism in which ligands lock HDAC3 into inactive conformations. Collectively, these findings offer mechanistic insights into HDAC3 regulation and highlight structural hot spots for the rational design of selective inhibitors with potential applications in targeted breast cancer therapy.

组蛋白去乙酰化酶3 （HDAC3）是参与乳腺癌进展的关键表观遗传调控因子，是一个有前景的治疗靶点。本文采用分子动力学（MD）模拟和结合自由能（MM/GBSA）计算方法研究了14种hdac3配体复合物，以确定抑制剂结合的决定因素。在配体上一致的关键残基包括Gly132、His134-135、Phe144、Asp170、His172、Phe200、Asp259、Leu266、Gly296、Tyr298和催化Zn2+离子。其中，domatinostat和entinostat的亲和力最强（ΔGbind≈-70 kcal/mol），与实验结果吻合较好（r = 0.60）。这两种配体还显示出较小的最高占据分子轨道-最低未占据分子轨道（HOMO-LUMO）间隙、高柔软度和高亲电性指数，为设计下一代HDAC3抑制剂提供了化学线索。值得注意的是，配体结合稳定了Phe200和Asn370周围的区域，限制了酶激活所需的构象灵活性。这支持了一种变构抑制机制，其中配体将HDAC3锁定为非活性构象。总的来说，这些发现提供了HDAC3调控的机制见解，并突出了合理设计选择性抑制剂的结构热点，这些抑制剂有可能应用于靶向乳腺癌治疗。

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引用次数: 0

Machine Learning–Driven discovery of mushroom-derived inhibitors targeting InhA of Mycobacterium tuberculosis: An integrated QSAR, molecular docking and molecular dynamic simulation approach 机器学习驱动下发现针对结核分枝杆菌InhA的蘑菇源抑制剂：综合QSAR，分子对接和分子动力学模拟方法

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-15 DOI: 10.1016/j.jmgm.2025.109220

Karma Wangchuk , Mudassar Fareed Awan , Syeda Nazish Sohaib , Abdul Basit , Biniyam Prince Danan , Laiba Nadeem , Guendouzi Abdelkrim , Aisha Khalid , Khursheed Muzammil

Mycobacterium tuberculosis causes tuberculosis (TB), which remains a significant health problem worldwide. The rise of multidrug-resistant bacteria has worsened the situation, and current treatments are becoming less effective. InhA, a key enzyme involved in mycolic acid biosynthesis, is a validated therapeutic target in anti-TB therapy. This study aimed to explore the chemical diversity of natural substances from mushrooms against TB. Experimentally validated inhibitors from ChEMBL were retrieved to generate machine learning–based QSAR models combining nine chemical fingerprints and rigorous feature selection. The optimal RF–SVM-RFE model displayed high prediction performance (accuracy = 0.953, ROC_AUC = 0.971) and led virtual screening of mushroom metabolites. Six top-ranked compounds, including Inoscavin A and Schizine A, displayed substantial binding affinities (−11.7 to −10.5 kcal/mol) and stable interaction networks in molecular docking and MD simulations. Explainable AI (SHAP and LIME) showed fundamental structural motifs that drive activity and enhance chemical interpretability. These findings suggest promising natural scaffolds for anti-TB drug development and underscore the importance of AI-driven strategies in accelerating natural product–based therapeutics.

结核分枝杆菌引起结核病（TB），这仍然是世界范围内的一个重大健康问题。耐多药细菌的增加使情况更加恶化，目前的治疗方法正在变得不那么有效。InhA是参与霉菌酸生物合成的关键酶，是抗结核治疗的有效靶点。本研究旨在探讨蘑菇抗结核天然物质的化学多样性。从ChEMBL中检索经过实验验证的抑制剂，生成基于机器学习的QSAR模型，该模型结合了9种化学指纹和严格的特征选择。优化后的RF-SVM-RFE模型具有较高的预测精度（准确率= 0.953,ROC_AUC = 0.971），可对蘑菇代谢产物进行虚拟筛选。在分子对接和分子动力学模拟中，Inoscavin A和Schizine A的结合亲和力（- 11.7 ~ - 10.5 kcal/mol）较高，具有稳定的相互作用网络。可解释的AI （SHAP和LIME）显示出驱动活性和增强化学可解释性的基本结构基序。这些发现为抗结核药物开发提供了有希望的天然支架，并强调了人工智能驱动战略在加速基于天然产品的治疗方面的重要性。

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引用次数: 0

CNT as a robust delivery vehicle for anti-breast cancer drugs: A combined DFT and in-silico study 碳纳米管作为抗乳腺癌药物的强大递送载体：一项DFT和计算机联合研究。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-14 DOI: 10.1016/j.jmgm.2025.109215

Sumanta Pal , Narendra Nath Ghosh , Soumen Kumar Pati , Manab Mandal

Nanomedicine has transformed cancer therapy by introducing and developing nanocarriers to enhance drug delivery. Herein, we have executed a computational investigation of the efficiency of two anti-breast cancer drugs viz. Exemestane (EXE) and Ruxolitinib (RUX) are delivered through armchair CNT (10,10). The encapsulation process of drugs in CNTs has been investigated through an analysis of various structural and electrical parameters viz. atom centered density matrix(ADMP), adsorption energy, electrostatic potential map(ESPM), molecular orbital(MO) analysis, natural bond orbital (NBO) analysis, non-covalent index (NCI) plot, and projected density of state (PDOS). The higher adsorption value of RUX -72.42 kcal/mol(-3.14 eV) with CNT and CNT-EXE -63.29 kcal/mol(-2.75 eV) indicates a stronger binding affinity of RUX and EXE. The electronic properties of the CNT were examined and compared before and after the adsorption process.Study of several thermodynamic parameters revealed that the whole encapsulation process is exothermic and spontaneous in nature. The stabilizing interaction of drugs and CNT has been established and validated from ADMP molecular dynamics simulation and NCI analysis was performed through the encapsulation procedure of the drugs within CNT at room temperature. The best docking score showed the CNT with EXE (−7.6 kcal/mol) followed by CNT with RUX (−7.5 kcal/mol), higher than the studied drugs i.e. EXE (−7.3 kcal/mol) and RUX (−7.2 kcal/mol). The docking score indicates that the inclusion complex has a better interaction and pave the way for unlimited opportunities for the delivery vehicle of CNT for the studied drugs within the biological systems.

纳米医学通过引入和开发纳米载体来增强药物传递，已经改变了癌症治疗。在此，我们对两种抗乳腺癌药物即依西美坦（EXE）和鲁索利替尼（Ruxolitinib）通过扶手椅CNT输送的效率进行了计算研究（10,10）。通过分析各种结构和电学参数，即原子中心密度矩阵（ADMP）、吸附能、静电势图（ESPM）、分子轨道（MO）分析、自然键轨道（NBO）分析、非共价键指数（NCI）图和投影态密度（PDOS），研究了药物在CNTs中的包封过程。RUX -72.42 kcal/mol（-3.14 eV）对CNT和CNT-EXE -63.29 kcal/mol（-2.75 eV）的吸附值较高，表明RUX和EXE的结合亲和力较强。对碳纳米管吸附前后的电子性能进行了检测和比较。对几个热力学参数的研究表明，整个包封过程是放热自发的。通过ADMP分子动力学模拟验证了药物与碳纳米管的稳定相互作用，并通过室温下药物在碳纳米管内的包封过程进行了NCI分析。最佳的对接分数是碳纳米管与EXE (-7.6 kcal/mol)，其次是碳纳米管与RUX (-7.5 kcal/mol)，高于所研究的药物EXE （-7.3 kcal/mol）和RUX （-7.2 kcal/mol）。对接分数表明，包合物具有更好的相互作用，为碳纳米管在生物系统内作为研究药物的递送载体铺平了无限的机会。

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引用次数: 0

Tunable field-dependent electronic and thermal conductivity of tetragonal germanene nanoribbons under temperature, chemical potential and external fields 温度、化学势和外场作用下方形锗烯纳米带的可调场依赖电子和热导率。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-14 DOI: 10.1016/j.jmgm.2025.109225

Somayeh Behzad

This theoretical study investigates the properties of T-GeNRs using tight-binding formalism, Green's function, and the Kubo formula. Our research examines the temperature dependence of thermodynamic functions under varying external parameters, including electric bias and magnetic fields and chemical potential. The application of bias voltage induces a band gap, the magnetic field enhances the density of states (DOS) and the chemical potential modulates the charge carrier concentration, leading to distinct modifications in the electrical and thermal properties across different temperature ranges. The electrical property analysis reveals that the unperturbed structure exhibits metallic behavior. This feature remains unchanged under magnetic field, with increasing field strength leading to significant enhancing DOS spectrum intensity. In contrast, the introduction of voltage bias induces a metal-to-semiconductor transition, with the band gap size being directly correlated to the bias strength. The thermodynamic properties, including electrical and thermal conductivity, Magnetic susceptibility and the Lorenz number, demonstrate distinct responses to external fields, while bias voltage reduces these properties, the magnetic field enhances them. A particularly notable feature in the temperature dependence of thermodynamic functions is emergence a zero-intensity region attributed to the energy gap formation. The occurrence of this zero-intensity temperature region is closely related to field strength, increasing with bias voltage and decreasing with the magnetic field. To optimize thermodynamic performance in the selected structures, the simultaneous application of voltage bias and a magnetic field can be employed, making T-GeNRs promising candidates for nanoelectronic and thermophotonic applications.

本文运用紧约束形式、格林函数和Kubo公式对t- genr的性质进行了理论研究。我们的研究考察了热力学函数在不同外部参数下的温度依赖性，包括电偏置、磁场和化学势。施加偏置电压诱导带隙，磁场增强态密度（DOS），化学势调节载流子浓度，导致不同温度范围内电学和热性能的明显变化。电学性能分析表明，无扰动结构表现出金属性质。这一特性在磁场作用下保持不变，随着磁场强度的增加，DOS谱强度显著增强。相反，电压偏置的引入导致金属到半导体的转变，带隙大小与偏置强度直接相关。热力学性质，包括电导率、导热率、磁化率和洛伦兹数，在外加磁场下表现出明显的响应，而偏置电压降低了这些性质，磁场增强了这些性质。在热力学函数的温度依赖性中，一个特别显著的特征是由于能隙的形成而出现零强度区域。该零强度温度区域的出现与磁场强度密切相关，随偏置电压增大而增大，随磁场增大而减小。为了优化所选结构的热力学性能，可以同时施加电压偏置和磁场，使t - genr成为纳米电子和热光子应用的有希望的候选者。

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引用次数: 0

Quantum chemical investigation of Z-shaped Diradicaloid heptazethrene derivatives towards linear and nonlinear optical polarizability z型七乙基二根醚衍生物线性和非线性光学偏振性的量子化学研究。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-13 DOI: 10.1016/j.jmgm.2025.109221

Rao Aqil Shehzad , Javed Iqbal , Shaukat Ali , Hafeez Anwar

Heptazethrene derivatives have garnered significant interest due to their potential applications in photovoltaics and optics. Building on previous studies that explored the structure-property relationship for photovoltaic applications, this research delves into a detailed analysis of infrared spectral examination, electron density difference, and non-covalent interactions. Directly linking optical absorption profiles, oscillator strength, and excited state data, such as dipole moment and transition energy, with linear and nonlinear optical polarizability, it is observed that heptazethrene derivatives exhibit desirable average diradical characteristics. These characteristics enhance the linear polarizability by 30–50 % and the nonlinear polarizability by 6–12 times compared to the reference. This investigation positions heptazethrene derivatives as promising materials to enhance optical and photonic technologies in optoelectronic devices.

七乙烷衍生物由于其在光电和光学领域的潜在应用而引起了人们的极大兴趣。在前人研究的基础上，本研究深入分析了光电材料的红外光谱检测、电子密度差和非共价相互作用。将光学吸收谱、振子强度和激发态数据（如偶极矩和跃迁能）与线性和非线性光学极化率直接联系起来，观察到七乙烷衍生物具有理想的平均双自由基特性。这些特性使线性极化率提高了30- 50%，非线性极化率提高了6-12倍。该研究将七乙烷衍生物定位为有前途的材料，以增强光电器件中的光学和光子技术。

引用次数: 0

Oxo-triaryl methyl (oxTAM) as targeted drug delivery vehicle for fludarabine and cytarabine anticancer drugs: A first-principles insight 氧三芳基甲基（oxTAM）作为氟达拉滨和阿糖胞苷抗癌药物的靶向药物递送载体：第一线原理的见解。

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-12 DOI: 10.1016/j.jmgm.2025.109224

Misbah Asif , Tariq Mahmood , Mazhar Amjad Gilani , Nadeem S. Sheikh , Imene Bayach , Khurshid Ayub

The design and development of efficient and responsive drug carriers always remain a challenge in targeted cancer treatment, where the traditional nanocarriers suffer the drawbacks of limited stability, a lack of selectivity, and slow release of the drug. In this perspective, the oxygenated triaryl methyl (oxTAM) nanocarrier is known for its tunability, and redox activity offers a promising alternative. In the present work, we hypothesize that the oxTAM carrier can function as an efficient and effective drug carrier for selected anticancer drugs like Fludarabine (Flu) and Cytarabine (Cyt) due to its ability to make stable noncovalent interactions and release of drugs in acidic conditions. The potential application of oxTAM as drug carrier is explored by using ωB97XD/6-31+G(d,p) functional. The interaction in energy analysis (E_int) and interacting distances (E_dis) reveal that oxTAM shows excellent interaction for Flu (−1.77 eV, 1.92 Å) drug. Non-covalent interaction index (NCI) indicates the existence of van der Waals interaction and hydrogen bonding (O—H bond) between the interacting moieties. The results of dipole moment and quantum chemical descriptors show the high reactivities of oxTAM for Flu and Cyt drugs. Electronic analysis including natural bond orbital (NBO) charge transfer demonstrates the higher response of Flu drug towards oxTAM. In addition, the reduced adsorption stability upon protonation in an acidic environment can quickly release drug molecules from the carrier. Short recovery time indicates easy drug delivery at the targeted site. From all these results, we concluded that oxTAM can be a potential candidate for further experimental exploration in drug delivery systems.

设计和开发高效、反应性强的药物载体一直是肿瘤靶向治疗中的一个挑战，传统的纳米载体存在稳定性有限、缺乏选择性、药物释放缓慢等缺点。从这个角度来看，氧化三芳基甲基（oxTAM）纳米载体以其可调性而闻名，氧化还原活性提供了一个有希望的替代方案。在目前的工作中，我们假设oxTAM载体可以作为一种高效的药物载体，用于某些抗癌药物，如氟达拉滨（Flu）和阿糖胞苷（Cyt），因为它能够在酸性条件下进行稳定的非共价相互作用和药物释放。通过ωB97XD/6-31+G（d,p）泛函探讨了oxTAM作为药物载体的潜在应用。相互作用能量分析（Eint）和相互作用距离（Edis）表明，oxTAM对流感药物具有良好的相互作用（-1.77 eV, 1.92 Å）。非共价相互作用指数（NCI）表明相互作用基团之间存在范德华相互作用和氢键（O-H键）。偶极矩和量子化学描述子的结果表明，oxTAM对流感和细胞药物具有较高的反应性。包括自然键轨道（NBO）电荷转移在内的电子分析表明，流感药物对oxTAM有更高的响应。此外，在酸性环境中质子化后的吸附稳定性降低，可以迅速从载体中释放药物分子。恢复时间短表明药物容易到达目标部位。综上所述，我们认为oxTAM有潜力在给药系统中进行进一步的实验探索。

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引用次数: 0

Mechanistic exploration of IGF2BP3-mediated m6A dynamics in diabetic retinopathy for therapeutic interventions through in silico approaches igf2bp3介导的m6A动态在糖尿病视网膜病变治疗干预中的机制探索

IF 3 4区生物学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of molecular graphics & modelling

Pub Date : 2025-11-11 DOI: 10.1016/j.jmgm.2025.109222

Hemavathy Nagarajan , Nishath Fathima Majid , Sharada Ramasubramanyan , Sampathkumar Ranganathan

Insulin-like growth factor 2 mRNA-binding protein 3 (IGF2BP3) is a crucial post-transcriptional regulator in mRNA localization, stability, and translation. While IGF2BP3 overexpression is widely studied in cancer, recent evidence highlights its role in diabetic retinopathy (DR), a significant cause of blindness. In DR, IGF2BP3 regulates pro-angiogenic and pro-inflammatory factors, such as VEGF, contributing to retinal vascular damage, neovascularization, and inflammation. These effects make IGF2BP3 a potential therapeutic target for DR. Henceforth, in this study, high-throughput virtual screening (HTVS) and molecular dynamics (MD) simulations were implemented to identify potential IGF2BP3 inhibitors, focusing on its KH3 and KH4 RNA-binding domains. The KH4 domain was selected as the optimal target with a higher druggability score. HTVS of the ChemDiv database identified three promising candidates: Y040–1954, C200-9224, and 1761-0723, which showed strong interactions with the GXXG motif within the KH4 domain, critical for RNA binding. Density Functional Theory (DFT) and molecular docking analysis confirmed these candidates' reactivity and binding affinity to IGF2BP3. MD simulations conducted over 200 ns showed that IGF2BP3-inhibitor complexes retained structural stability with consistent hydrogen bonding, particularly involving key residues Ser624, Ser627, and Thr628. These findings suggest that the identified compounds could disrupt IGF2BP3's interaction with m6A-modified RNA, potentially blocking its role in stabilizing pro-angiogenic and pro-inflammatory mRNAs in DR. With experimental validation and optimization, these compounds could significantly advance the treatment landscape for DR, offering hope for better outcomes in this leading cause of blindness.

胰岛素样生长因子2 mRNA结合蛋白3 （IGF2BP3）是mRNA定位、稳定和翻译的关键转录后调节因子。虽然IGF2BP3过表达在癌症中被广泛研究，但最近的证据强调了它在糖尿病视网膜病变（DR）中的作用，这是导致失明的重要原因。在DR中，IGF2BP3调节促血管生成和促炎症因子，如VEGF，促进视网膜血管损伤、新生血管和炎症。这些作用使IGF2BP3成为dr的潜在治疗靶点。因此，本研究采用高通量虚拟筛选（HTVS）和分子动力学（MD）模拟来鉴定潜在的IGF2BP3抑制剂，重点关注其KH3和KH4 rna结合域。KH4结构域被选为最佳靶点，具有较高的致药性评分。ChemDiv数据库的HTVS确定了三个有希望的候选者：Y040-1954， C200-9224和1761-0723，它们与KH4结构域内的GXXG基序具有强相互作用，对RNA结合至关重要。密度泛函理论（DFT）和分子对接分析证实了这些候选物与IGF2BP3的反应性和结合亲和力。超过200 ns的MD模拟表明，igf2bp3抑制剂复合物保持结构稳定性，具有一致的氢键，特别是涉及关键残基Ser624、Ser627和Thr628。这些发现表明，所鉴定的化合物可能会破坏IGF2BP3与m6a修饰RNA的相互作用，潜在地阻断其在DR中稳定促血管生成和促炎症mrna的作用。通过实验验证和优化，这些化合物可能会显著推进DR的治疗前景，为这一主要致盲原因带来更好的结果。

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引用次数: 0