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Pérez-Pérez D, Fuentes-Pananá EM, Flores-Hermenegildo JM, Romero-Ramirez H, Santos-Argumedo L, Kilimann MW, Rodríguez-Alba JC, Lopez-Herrera G. Lipopolysaccharide-responsive beige-like anchor is involved in regulating NF-κB activation in B cells. Front Immunol 2024; 15:1409434. [PMID: 39076990 PMCID: PMC11284061 DOI: 10.3389/fimmu.2024.1409434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 06/21/2024] [Indexed: 07/31/2024] Open
Abstract
Introduction Lipopolysaccharide-responsive and beige-like anchor (LRBA) is a scaffolding protein that interacts with proteins such as CTLA-4 and PKA, the importance of which has been determined in various cell types, including T regulatory cells, B cells, and renal cells. LRBA deficiency is associated with an inborn error in immunity characterized by immunodeficiency and autoimmunity. In addition to defects in T regulatory cells, patients with LRBA deficiency also exhibit B cell defects, such as reduced cell number, low memory B cells, hypogammaglobulinemia, impaired B cell proliferation, and increased autophagy. Although Lrba-/- mice do not exhibit the immunodeficiency observed in humans, responses to B cell receptors (BCR) in B cells have not been explored. Therefore, a murine model is for elucidating the mechanism of Lrba mechanism in B cells. Aim To compare and evaluate spleen-derived B cell responses to BCR crosslinking in C57BL6 Lrba-/- and Lrba+/+ mice. Materials and methods Spleen-derived B cells were obtained from 8 to 12-week-old mice. Subpopulations were determined by immunostaining and flow cytometry. BCR crosslinking was assessed by the F(ab')2 anti-μ chain. Activation, proliferation and viability assays were performed using flow cytometry and protein phosphorylation was evaluated by immunoblotting. The nuclear localization of p65 was determined using confocal microscopy. Nur77 expression was evaluated by Western blot. Results Lrba-/- B cells showed an activated phenotype and a decreased proportion of transitional 1 B cells, and both proliferation and survival were affected after BCR crosslinking in the Lrba-/- mice. The NF-κB pathway exhibited a basal activation status of several components, resulting in increased activation of p50, p65, and IκBα, basal p50 activation was reduced by the Plcγ2 inhibitor U73122. BCR crosslinking in Lrba-/ - B cells resulted in poor p50 phosphorylation and p65 nuclear localization. Increased levels of Nur77 were detected. Discussion These results indicate the importance of Lrba in controlling NF-κB activation driven by BCR. Basal activation of NF-κB could impact cellular processes, such as, activation, differentiation, proliferation, and maintenance of B cells after antigen encounter.
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Affiliation(s)
- Daniela Pérez-Pérez
- Doctorate Program in Biological Sciences, Autonomous National University of Mexico, Mexico City, Mexico
- Immunodeficiency Laboratory, National Institute of Pediatrics, Mexico City, Mexico
| | | | - José Mizael Flores-Hermenegildo
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV IPN, Mexico City, Mexico
| | - Hector Romero-Ramirez
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV IPN, Mexico City, Mexico
| | - Leopoldo Santos-Argumedo
- Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV IPN, Mexico City, Mexico
| | - Manfred W. Kilimann
- Department of Molecular Neurobiology, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Juan Carlos Rodríguez-Alba
- Medicine and Surgery Faculty, Autonomous University Benito Juarez from Oaxaca, Oaxaca, Mexico
- Neuroimmunology and Neurooncology Unit, The National Institute of Neurology and Neurosurgery (NINN), Mexico City, Mexico
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Perez-Perez D, Santos-Argumedo L, Rodriguez-Alba JC, Lopez-Herrera G. Analysis of LRBA pathogenic variants and the association with functional protein domains and clinical presentation. Pediatr Allergy Immunol 2024; 35:e14179. [PMID: 38923448 DOI: 10.1111/pai.14179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 05/29/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024]
Abstract
LRBA is a cytoplasmic protein that is ubiquitously distributed. Almost all LRBA domains have a scaffolding function. In 2012, it was reported that homozygous variants in LRBA are associated with early-onset hypogammaglobulinemia. Since its discovery, more than 100 pathogenic variants have been reported. This review focuses on the variants reported in LRBA and their possible associations with clinical phenotypes. In this work LRBA deficiency cases reported more than 11 years ago have been revised. A database was constructed to analyze the type of variants, age at onset, clinical diagnosis, infections, autoimmune diseases, and cellular and immunoglobulin levels. The review of cases from 2012 to 2023 showed that LRBA deficiency was commonly diagnosed in patients with a clinical diagnosis of Common Variable Immunodeficiency, followed by enteropathy, neonatal diabetes mellitus, ALPS, and X-linked-like syndrome. Most cases show early onset of presentation at <6 years of age. Most cases lack protein expression, whereas hypogammaglobulinemia is observed in half of the cases, and IgG and IgA levels are isotypes reported at low levels. Patients with elevated IgG levels exhibited more than one autoimmune manifestation. Patients carrying pathogenic variants leading to a premature stop codon show a severe phenotype as they have an earlier onset of disease presentation, severe autoimmune manifestations, premature death, and low B cells and regulatory T cell levels. Missense variants were more common in patients with low IgG levels and cytopenia. This work lead to the conclusion that the type of variant in LRBA has association with disease severity, which leads to a premature stop codon being the ones that correlates with severe disease.
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Affiliation(s)
- D Perez-Perez
- Doctorate Program in Biological Sciences, Autonomous National University of Mexico, Mexico City, Mexico
- Immunodeficiencies Laboratory, National Institute of Pediatrics (INP), Mexico City, Mexico
| | - L Santos-Argumedo
- Biomedicine Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV), Mexico City, Mexico
| | - J C Rodriguez-Alba
- Neuroimmunology and Neurooncology Unit, The National Institute of Neurology and Neurosurgery (NINN), Mexico City, Mexico
- Medicine and Surgery Faculty, Autonomous University Benito Juarez from Oaxaca, Oaxaca, Mexico
| | - G Lopez-Herrera
- Immunodeficiencies Laboratory, National Institute of Pediatrics (INP), Mexico City, Mexico
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Zhou L, Ding X, Cao J, Feng Y, Gu Y, Liu L, Chen R, Gao D, Chen X. Systematic profiling of Taxol resistance and sensitivity to tubulin missence mutations at molecular and cellular levels. Chem Biol Drug Des 2024; 103:e14513. [PMID: 38570322 DOI: 10.1111/cbdd.14513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/24/2024] [Accepted: 03/15/2024] [Indexed: 04/05/2024]
Abstract
Taxol (paclitaxel) is the first approved microtubule-stabilizing agent (MSA) by binding stoichiometrically to tubulin, which is considered to be one of the most significant advances in first-line chemotherapy against diverse tumors. However, a large number of residue missence mutations harboring in the tubulin have been observed to cause acquired drug resistance, largely limiting the clinical application of Taxol and its analogs in chemotherapy. A systematic investigation of the intermolecular interactions between the Taxol and various tubulin mutants would help to establish a comprehensive picture of drug response to tubulin mutations in clinical treatment of cancer, and to design new MSA agents with high potency and selectivity to overcome drug resistance. In this study, we described an integration of in silico analysis and in vitro assay (iSiV) to profile Taxol against a panel of 149 clinically observed, cancer-associated missence mutations in β-tubulin at molecular and cellular levels, aiming to a systematic understanding of molecular mechanism and biological implication underlying drug resistance and sensitivity conferring from tubulin mutations. It is revealed that the Taxol-resistant mutations can be classified into three types: (I) nonbonded interaction broken due to mutation, (II) steric hindrance caused by mutation, and (III) conformational change upon mutation. In addition, we identified three new Taxol-resistant mutations (C239Y, T274I, and R320P) that can largely reduce the binding affinity of Taxol to tubulin at molecular level, in which the T274I and R320P were observed to considerably impair the antitumor activity of Taxol at cellular level. Moreover, a novel drug-susceptible mutation (M363T) was also identified, which improves Taxol affinity by 2.6-fold and decreases Taxol antitumor EC50 values from 29.4 to 18.7 μM.
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Affiliation(s)
- Lihua Zhou
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Xi Ding
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Jingjing Cao
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Yu Feng
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Yuqin Gu
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Ling Liu
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Rong Chen
- Department of Pharmacy, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Dongyun Gao
- Department of Oncology, The Dongtai Hospital of Nantong University, Dongtai, China
| | - Xiaoling Chen
- Department of Respiratory Medicine, The Dongtai Hospital of Nantong University, Dongtai, China
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Zhang L, Gong Y, Shen L. Molecular Stapling of Human Pediatric RSV Phosphoprotein’s C-terminal Tail-Derived Peptides to Target the Coupled Folding-Upon-Binding Event Between Phosphoprotein and Nucleocapsid. Int J Pept Res Ther 2022. [DOI: 10.1007/s10989-022-10483-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Wang K, Li B, Ge L, Xie Y. Molecular insight into the systematic affinity and selectivity of partner recognition sites between the WW1 and WW2 domains of human KIBRA neuroprotein. J Mol Graph Model 2022; 116:108258. [PMID: 35810735 DOI: 10.1016/j.jmgm.2022.108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 05/22/2022] [Accepted: 06/21/2022] [Indexed: 12/14/2022]
Abstract
Human KIBRA, a member of the WWC family proteins, is an upstream regulator of the Salvador/Warts/Hippo (SWH) signaling pathway and predominately expressed in nervous system. The protein has two functionally regulatory domains WW1 and WW2 at N-terminal region, which recognize and bind to the PY-motif segments of their partner proteins to serve as a signaling scaffold role in the SWH pathway. The two domains are highly conserved, but their downstream ligands and biological functions may not be fully consistent. In this study, we attempted to systematically profile the PY-motif affinity to and selectivity between KIBRA WW1 and WW2 domains involved in partner recognition sites. Ontology mining was used to enrich the KIBRA-interacting proteins in literature libraries, from which a variety of PY-motif peptide segments were identified, and their binding behavior to each domain was then analyzed by integrating computational modeling and experimental assay. Most PY-motif peptides were found to interact potently with WW1 and WW2, but they generally only exhibit a moderate or modest selectivity between the two domains. Subsequently, several representative peptides were further examined in detail to elucidate the molecular mechanism underlying their affinity and selectivity. It is revealed that the middle motif region of PY-motif peptides is primarily responsible for the affinity and stability of peptide binding, but only contributes marginally to peptide selectivity. Instead, the N-terminal region and, particularly, C-terminal region of PY-motif peptides play a crucial role in the selectivity. Hydrophobic contacts and hydrogen bonds confer stability and specificity to the domain-peptide interaction, respectively.
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Affiliation(s)
- Kai Wang
- Department of Anesthesiology, Rizhao People's Hospital, Affiliated to Jining Medical University, Rizhao, 276827, China
| | - Baoqiang Li
- Department of Anesthesiology, Rizhao People's Hospital, Affiliated to Jining Medical University, Rizhao, 276827, China
| | - Lei Ge
- Department of Emergency, Rizhao People's Hospital, Affiliated to Jining Medical University, Rizhao, 276827, China
| | - Yi Xie
- Department of Anesthesiology, Zibo Central Hospital, Affiliated to Binzhou Medical University, Zibo, 255020, China.
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Abstract
Protein kinase A (PKA) directly phosphorylates aquaporin-2 (AQP2) water channels in renal collecting ducts to reabsorb water from urine for the maintenance of systemic water homeostasis. More than 50 functionally distinct PKA-anchoring proteins (AKAPs) respectively create compartmentalized PKA signaling to determine the substrate specificity of PKA. Identification of an AKAP responsible for AQP2 phosphorylation is an essential step toward elucidating the molecular mechanisms of urinary concentration. PKA activation by several compounds is a novel screening strategy to uncover PKA substrates whose phosphorylation levels were nearly perfectly correlated with that of AQP2. The leading candidate in this assay proved to be an AKAP termed lipopolysaccharide-responsive and beige-like anchor protein (LRBA). We found that LRBA colocalized with AQP2 in vivo, and Lrba knockout mice displayed a polyuric phenotype with severely impaired AQP2 phosphorylation. Most of the PKA substrates other than AQP2 were adequately phosphorylated by PKA in the absence of LRBA, demonstrating that LRBA-anchored PKA preferentially phosphorylated AQP2 in renal collecting ducts. Furthermore, the LRBA-PKA interaction, rather than other AKAP-PKA interactions, was robustly dissociated by PKA activation. AKAP-PKA interaction inhibitors have attracted attention for their ability to directly phosphorylate AQP2. Therefore, the LRBA-PKA interaction is a promising drug target for the development of anti-aquaretics.
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Emam AM, Dahal A, Singh SS, Tosso RD, Ibrahim SM, El-Sadek M, Jois SD, Enriz RD, Kothayer H. Quinazoline-tethered hydrazone: A versatile scaffold toward dual anti-TB and EGFR inhibition activities in NSCLC. Arch Pharm (Weinheim) 2021; 354:e2100281. [PMID: 34585758 DOI: 10.1002/ardp.202100281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/07/2022]
Abstract
Globally, lung cancer and tuberculosis are considered to be very serious and complex diseases. Evidence suggests that chronic infection with tuberculosis (TB) can often lead to lung tumors; therefore, developing drugs that target both diseases is of great clinical significance. In our study, we designed and synthesized a suite of 14 new quinazolinones (5a-n) and performed biological investigations of these compounds in Mycobacterium tuberculosis (MTB) and cancer cell lines. In addition, we conducted a molecular modeling study to determine the mechanism of action of these compounds at the molecular level. Compounds that showed anticancer activity in the preliminary screening were further evaluated in three cancer cell lines (A549, Calu-3, and BT-474 cells) and characterized in an epidermal growth factor receptor (EGFR) binding assay. Cytotoxicity in noncancerous lung fibroblast cells was also evaluated to obtain safety data. Our theoretical and experimental studies indicated that our compounds showed a mechanism of action similar to that of erlotinib by inhibiting the EGFR tyrosine kinase. In turn, the antituberculosis activity of these compounds would be produced by the inhibition of enoyl-ACP-reductase. From our findings, we were able to identify two potential lead compounds (5i and 5l) with dual activity and elevated safety toward noncancerous lung fibroblast cells. In addition, our data identified three compounds with excellent anti-TB activities (compounds 5i, 5l, and 5n).
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Affiliation(s)
- Aya M Emam
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Achyut Dahal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Sitanshu S Singh
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Rodrigo D Tosso
- Pharmacy Department, Facultad de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, San Luis, Argentina
| | - Samy M Ibrahim
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Mohamed El-Sadek
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Seetharama D Jois
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Ricardo D Enriz
- Pharmacy Department, Facultad de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, San Luis, Argentina
| | - Hend Kothayer
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Targeting the actin nucleation promoting factor WASp provides a therapeutic approach for hematopoietic malignancies. Nat Commun 2021; 12:5581. [PMID: 34552085 PMCID: PMC8458504 DOI: 10.1038/s41467-021-25842-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 09/03/2021] [Indexed: 12/24/2022] Open
Abstract
Cancer cells depend on actin cytoskeleton rearrangement to carry out hallmark malignant functions including activation, proliferation, migration and invasiveness. Wiskott–Aldrich Syndrome protein (WASp) is an actin nucleation-promoting factor and is a key regulator of actin polymerization in hematopoietic cells. The involvement of WASp in malignancies is incompletely understood. Since WASp is exclusively expressed in hematopoietic cells, we performed in silico screening to identify small molecule compounds (SMCs) that bind WASp and promote its degradation. We describe here one such identified molecule; this WASp-targeting SMC inhibits key WASp-dependent actin processes in several types of hematopoietic malignancies in vitro and in vivo without affecting naïve healthy cells. This small molecule demonstrates limited toxicity and immunogenic effects, and thus, might serve as an effective strategy to treat specific hematopoietic malignancies in a safe and precisely targeted manner. Cancer cells proliferate and invade via cytoskeletal proteins such as WASp, exclusively expressed in hematopoietic cells. Here the authors show a specific small molecule compound inhibiting cancer cell activity by WASp degradation and demonstrating its therapeutic potential in vitro and in vivo.
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Zhao Y, Zhu D, Gao J. Molecular analysis and systematic profiling of allosteric inhibitor response to clinically significant epidermal growth factor receptor missense mutations in non‐small cell lung cancer. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yan Zhao
- Department of Cardiothoracic Surgery Zibo First Hospital Zibo China
| | - Dan Zhu
- Shandong Drug and Food Vocational College Weihai China
| | - Junzhen Gao
- Department of Respiratory and Critical Care Medicine Affiliated Hospital of Inner Mongolia Medical University Hohhot China
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He B, Wu T, He P, Lv F, Liu H. Structure-based derivation and optimization of YAP-like coactivator-derived peptides to selectively target TEAD family transcription factors by hydrocarbon stapling and cyclization. Chem Biol Drug Des 2021; 97:1129-1136. [PMID: 33283479 DOI: 10.1111/cbdd.13813] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/28/2020] [Accepted: 11/29/2020] [Indexed: 12/25/2022]
Abstract
Human transcriptional enhanced associate domain (TEAD) family consists of four paralogous transcription factors that function to modulate gene expression by interacting with YAP-like coactivators and have been recognized as potential therapeutic targets of diverse diseases including lung cancer and gastric tumor. Here, we attempt to explore the systematic interaction profile between the 4 TEAD proteins and the peptides derived from the binding sites of 8 known YAP-like coactivators, in order to analyze the binding affinity and recognition specificity of these peptides toward the TEAD family, and to design hydrocarbon-stapled/cyclized peptides that can target the specific interaction profile for each coactivator. Structural, energetic, and dynamic investigations of TEAD-coactivator interactions reveal that the coactivators adopt three independent secondary structure regions (β-strand, α-helix, and Ω-loop) to surround on the surface of TEAD proteins, in which the α-helical and Ω-loop regions are primarily responsible for the interactions. Five α-helical peptides and four Ω-loop peptides are derived from the 8 YAP-like coactivators, and their systematic binding profile toward the 4 TEAD proteins is created, and hydrocarbon stapling and cyclization strategies are employed to constrain the free α-helical and Ω-loop peptides into their native conformations, respectively, thus effectively promoting peptide binding to TEADs. The all-hydrocarbon and disulfide bridges are designed to point out the TEAD-peptide complex interface, which would not disrupt the direct intermolecular interaction between the TEAD and peptide. Therefore, the stapling and cyclization only improve peptide binding affinity to these TEADs, but do not alter peptide recognition specificity over different TEADs.
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Affiliation(s)
- Bo He
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tao Wu
- Department of Thoracic Surgery, Chongqing Traditional Chinese Medicine Hospital, Chongqing, China
| | - Ping He
- Department of Cardiac Surgery, Southwest Hospital, Third Army Medical University, Chongqing, China
| | - Fenglin Lv
- College of Bioengineering, Chongqing University, Chongqing, China
| | - Hongxiang Liu
- Department of Thoracic Surgery, Chongqing Traditional Chinese Medicine Hospital, Chongqing, China
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Zhu J, Wu Y, Xu L, Jin J. Theoretical Studies on the Selectivity Mechanisms of Glycogen Synthase Kinase 3β (GSK3β) with Pyrazine ATP-competitive Inhibitors by 3DQSAR, Molecular Docking, Molecular Dynamics Simulation and Free Energy Calculations. Curr Comput Aided Drug Des 2020; 16:17-30. [PMID: 31284868 PMCID: PMC6967214 DOI: 10.2174/1573409915666190708102459] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/16/2019] [Accepted: 06/09/2019] [Indexed: 01/11/2023]
Abstract
Background Glycogen synthase kinase-3 (GSK3) is associated with various key biological processes and has been considered as an important therapeutic target for the treatment of many diseases. Great efforts have been made on the development of GSK3 inhibitors, especially ATP-competitive GSK3β inhibitor, but it is still a great challenge to develop selective GSK3β inhibitors because of the high sequence homology with other kinases. Objective In order to reveal the selectivity mechanisms of GSK3β inhibition at the molecular level, a series of ATP-competitive GSK3β inhibitor was analyzed by a systematic computational method, combining 3D-QSAR, molecular docking, molecular dynamic simulations and free energy calculations. Methods Firstly, 3D-QSAR with CoMFA was built to explore the general structure activity relationships. Secondly, CDOCKER and Flexible docking were employed to predicted the reasonable docking poses of all studied inhibitors. And then, both GSK3β and CDK2 complexes were selected to conduct molecular dynamics simulations. Finally, the free energy calculations were employed to find the key selective-residues. Results CoMFA model suggested the steric, hydrophobic fields play key roles in the bioactivities of inhibitors, and the binding mechanisms were well analyzed through molecular docking. The binding free energies predicted are in good agreement with the experimental bioactivities and the free energy calculations showed that the binding of GSK3β/inhibitors was mainly contributed from hydrogen bonding and hydrophobic interaction. Conclusion Some key residues for selective binding were highlighted, which may afford important guidance for the rational design of novel ATP-competitive GSK3β inhibitors.
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Affiliation(s)
- Jingyu Zhu
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yuanqing Wu
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Jian Jin
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, Jiangsu 214122, China
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Zhou W, Yang H, Wang H. Inverse in silico-in vitro fishing of unexpected paroxetine kinase targets from tumor druggable kinome. J Mol Model 2020; 26:197. [PMID: 32623519 DOI: 10.1007/s00894-020-04444-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 06/15/2020] [Indexed: 12/11/2022]
Abstract
The serotonin selective reuptake inhibitor paroxetine has been clinically observed to reposition a significant suppressing potency on human tumors by unexpectedly targeting diverse kinase pathways involved in tumorigenesis. Here, we describe an inverse in silico-in vitro strategy to fish potential kinase targets using the paroxetine as bait. This is different (inverse) to the traditional drug discovery process that commonly screens small-molecule inhibitors for a specific kinase target. In the procedure, cell viability assays demonstrate that paroxetine has strong cytotoxicity on human tumor cell lines. Various protooncogene protein kinases are ontologically/manually enriched to define a druggable kinome, and a systematic interaction profile of paroxetine with the kinome is created, which indicates that paroxetine can potentially bind to some known targets or key regulators of human tumors. Kinase assays determine that paroxetine can effectively inhibit c-Src family kinases at nanomolar or micromolar levels. It is observed that the paroxetine ligand forms a tightly packed interface against the active site of these unexpected kinase targets to constitute several specific hydrogen bonds/π-π/cation-π stackings and a number of nonspecific hydrophobic/vdW contacts, while exposing a portion of molecular surface to solvent. More significantly, the ligand adopts two distinct binding modes (i.e., class I and class II) to interact with different kinases; the class-I mode has a higher stability and inhibitory activity than class-II mode. Steric clash seems to cause the ligand flipping from class I to class II. Graphical abstract.
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Affiliation(s)
- Weiyan Zhou
- Department of Gynaecology, The Affiliated Huai'an Hospital of Xuzhou Medical University and the Second People's Hospital of Huai'an, Huai'an, 223002, China
| | - Hongbo Yang
- Department of Gynaecology, Huai'an Maternal and Child Health Care Center, The Affiliated Hospital of Yangzhou University Medical College, Huai'an, 223000, China
| | - Haifeng Wang
- Department of Gynaecology, Huai'an Maternal and Child Health Care Center, The Affiliated Hospital of Yangzhou University Medical College, Huai'an, 223000, China.
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Weng G, Wang E, Wang Z, Liu H, Zhu F, Li D, Hou T. HawkDock: a web server to predict and analyze the protein-protein complex based on computational docking and MM/GBSA. Nucleic Acids Res 2020; 47:W322-W330. [PMID: 31106357 PMCID: PMC6602443 DOI: 10.1093/nar/gkz397] [Citation(s) in RCA: 285] [Impact Index Per Article: 71.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/23/2019] [Accepted: 05/01/2019] [Indexed: 02/07/2023] Open
Abstract
Protein–protein interactions (PPIs) play an important role in the different functions of cells, but accurate prediction of the three-dimensional structures for PPIs is still a notoriously difficult task. In this study, HawkDock, a free and open accessed web server, was developed to predict and analyze the structures of PPIs. In the HawkDock server, the ATTRACT docking algorithm, the HawkRank scoring function developed in our group and the MM/GBSA free energy decomposition analysis were seamlessly integrated into a multi-functional platform. The structures of PPIs were predicted by combining the ATTRACT docking and the HawkRank re-scoring, and the key residues for PPIs were highlighted by the MM/GBSA free energy decomposition. The molecular visualization was supported by 3Dmol.js. For the structural modeling of PPIs, HawkDock could achieve a better performance than ZDOCK 3.0.2 in the benchmark testing. For the prediction of key residues, the important residues that play an essential role in PPIs could be identified in the top 10 residues for ∼81.4% predicted models and ∼95.4% crystal structures in the benchmark dataset. To sum up, the HawkDock server is a powerful tool to predict the binding structures and identify the key residues of PPIs. The HawkDock server is accessible free of charge at http://cadd.zju.edu.cn/hawkdock/.
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Affiliation(s)
- Gaoqi Weng
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Ercheng Wang
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Zhe Wang
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hui Liu
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Feng Zhu
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Dan Li
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Tingjun Hou
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.,State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
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14
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Zhu J, Ke K, Xu L, Jin J. Theoretical studies on the selectivity mechanisms of PI3Kδ inhibition with marketed idelalisib and its derivatives by 3D-QSAR, molecular docking, and molecular dynamics simulation. J Mol Model 2019; 25:242. [DOI: 10.1007/s00894-019-4129-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 07/09/2019] [Indexed: 01/01/2023]
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15
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Fu Y, He P, Zhou Y, Huang S, Liang L, Liu S. Exploring the systematic effect of
N
‐substituted PxxP motifs on peptoid affinity to ARHGEF5/TIM SH3 domain and its relationship with ARHGEF5/TIM activation. Proteins 2019; 87:979-991. [PMID: 31197859 DOI: 10.1002/prot.25760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 06/04/2019] [Accepted: 06/07/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Yong Fu
- Department of Endocrine and Breast SurgeryThe First Affiliated Hospital of Chongqing Medical University Chongqing China
- Department of Cardiothoracic SurgeryDianjiang People's Hospital of Chongqing Chongqing China
| | - Ping He
- Department of Cardiac SurgerySouthwest Hospital, Third Army Medical University Chongqing China
| | - Yu Zhou
- Department of Cardiothoracic SurgeryDianjiang People's Hospital of Chongqing Chongqing China
| | - Shengyuan Huang
- Department of Cardiothoracic SurgeryDianjiang People's Hospital of Chongqing Chongqing China
| | - Lin Liang
- Department of Cardiothoracic SurgeryDianjiang People's Hospital of Chongqing Chongqing China
| | - Shengchun Liu
- Department of Endocrine and Breast SurgeryThe First Affiliated Hospital of Chongqing Medical University Chongqing China
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16
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Wang E, Sun H, Wang J, Wang Z, Liu H, Zhang JZH, Hou T. End-Point Binding Free Energy Calculation with MM/PBSA and MM/GBSA: Strategies and Applications in Drug Design. Chem Rev 2019; 119:9478-9508. [DOI: 10.1021/acs.chemrev.9b00055] [Citation(s) in RCA: 578] [Impact Index Per Article: 115.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ercheng Wang
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Huiyong Sun
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Junmei Wang
- Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Zhe Wang
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hui Liu
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - John Z. H. Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development, Shanghai Key Laboratory of Green Chemistry & Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
- NYU−ECNU Center for Computational Chemistry, NYU Shanghai, Shanghai 200122, China
- Department of Chemistry, New York University, New York, New York 10003, United States
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Tingjun Hou
- Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
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17
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Li K, Zhu J, Xu L, Jin J. Rational Design of Novel Phosphoinositide 3-Kinase Gamma (PI3Kγ) Selective Inhibitors: A Computational Investigation Integrating 3D-QSAR, Molecular Docking and Molecular Dynamics Simulation. Chem Biodivers 2019; 16:e1900105. [PMID: 31111650 DOI: 10.1002/cbdv.201900105] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/20/2019] [Indexed: 11/08/2022]
Abstract
Phosphoinositide 3-kinase gamma (PI3Kγ) draws an increasing attention due to its link with deadly cancer, chronic inflammation and allergy. But the development of PI3Kγ selective inhibitors is still a challenging endeavor because of the high sequence homology with the other PI3K isoforms. In order to acquire valuable information about the interaction mechanism between potent inhibitors and PI3Kγ, a series of PI3Kγ isoform-selective inhibitors were analyzed by a systematic computational method, combining 3D-QSAR, molecular docking, molecular dynamic (MD) simulations, free energy calculations and decomposition. The general structure-activity relationships were revealed and some key residues relating to selectivity and high activity were highlighted. It provides precious guidance for rational virtual screening, modification and design of selective PI3Kγ inhibitors. Finally, ten novel inhibitors were optimized and P10 showed satisfactory predicted bioactivity, demonstrating the feasibility to develop potent PI3Kγ inhibitors through this computational modeling and optimization.
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Affiliation(s)
- Kan Li
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, P. R. China
| | - Jingyu Zhu
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, P. R. China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou, 213001, P. R. China
| | - Jian Jin
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, P. R. China
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18
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Qian H, He P, Lv F, Wu W. Genome-wide analysis of LXXLL-mediated DAX1/SHP–nuclear receptor interaction network and rational design of stapled LXXLL-based peptides to target the specific network profile. Int J Biol Macromol 2019; 129:13-22. [DOI: 10.1016/j.ijbiomac.2019.02.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 02/02/2019] [Accepted: 02/02/2019] [Indexed: 01/22/2023]
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19
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Shen C, Liu H, Wang X, Lei T, Wang E, Xu L, Yu H, Li D, Yao X. Importance of Incorporating Protein Flexibility in Molecule Modeling: A Theoretical Study on Type I 1/2 NIK Inhibitors. Front Pharmacol 2019; 10:345. [PMID: 31024312 PMCID: PMC6465739 DOI: 10.3389/fphar.2019.00345] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 03/20/2019] [Indexed: 12/15/2022] Open
Abstract
NF-κB inducing kinase (NIK), which is considered as the central component of the non-canonical NF-κB pathway, has been proved to be an important target for the regulation of the immune system. In the past few years, NIK inhibitors with various scaffolds have been successively reported, among which type I1/2 inhibitors that can not only bind in the ATP-binding pocket at the DFG-in state but also extend into an additional back pocket, make up the largest proportion of the NIK inhibitors, and are worthy of more attention. In this study, an integration protocol that combines molecule docking, MD simulations, ensemble docking, MM/GB(PB)SA binding free energy calculations, and decomposition was employed to understand the binding mechanism of 21 tricyclic type I1/2 NIK inhibitors. It is found that the docking accuracy is largely dependent on the selection of docking protocols as well as the crystal structures. The predictions given by the ensemble docking based on multiple receptor conformations (MRCs) and the MM/GB(PB)SA calculations based on MD simulations showed higher linear correlations with the experimental data than those given by conventional rigid receptor docking (RRD) methods (Glide, GOLD, and Autodock Vina), highlighting the importance of incorporating protein flexibility in predicting protein–ligand interactions. Further analysis based on MM/GBSA demonstrates that the hydrophobic interactions play the most essential role in the ligand binding to NIK, and the polar interactions also make an important contribution to the NIK-ligand recognition. A deeper comparison of several pairs of representative derivatives reveals that the hydrophobic interactions are vitally important in the structural optimization of analogs as well. Besides, the H-bond interactions with some key residues and the large desolvation effect in the back pocket devote to the affinity distinction. It is expected that our study could provide valuable insights into the design of novel and potent type I1/2 NIK inhibitors.
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Affiliation(s)
- Chao Shen
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Hui Liu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Xuwen Wang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Tailong Lei
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Ercheng Wang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Lei Xu
- School of Electrical and Information Engineering, Institute of Bioinformatics and Medical Engineering, Jiangsu University of Technology, Changzhou, China
| | - Huidong Yu
- Rongene Pharma Co., Ltd., Shenzhen, China
| | - Dan Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Xiaojun Yao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau, China
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20
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Zhu J, Li K, Xu L, Jin J. Insight into the selective mechanism of phosphoinositide 3-kinase γ with benzothiazole and thiazolopiperidine γ-specific inhibitors by in silico approaches. Chem Biol Drug Des 2019; 93:818-831. [PMID: 30582283 DOI: 10.1111/cbdd.13469] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/23/2018] [Accepted: 12/19/2018] [Indexed: 11/29/2022]
Abstract
The phosphoinositide 3-kinase γ (PI3Kγ) has been verified to be a potential drug target for the treatments of various human physical disorders. Although received lots of attention, the development of PI3Kγ-selective inhibitors is still a challenging subject because of its unique protein structural features. Aiming to uncover the interaction mechanism between the selective inhibitors and PI3Kγ, a series of benzothiazole and thiazolopiperidine PI3Kγ isoform-selective inhibitors were studied with an integrated in silico strategy by combining molecular docking, molecular dynamic simulations, binding free energy calculations, and decomposition analysis. Firstly, three molecular docking models, including rigid receptor docking, induced fit docking (IFD), and quantum mechanical-polarized ligand docking, were respectively, built, and the IFD preliminarily predicted the docking poses of all studied inhibitors and roughly analyzed the binding mechanism. Secondly, four binding complexes with representative inhibitors were selected to perform molecular dynamic simulations and free energy calculations. The predicted binding energies were consistent with the experimental bioactivities and different binding patterns between potent and weak inhibitors were uncovered. Finally, through the Molecular Mechanics/Generalized Born Surface Area binding free energy decomposition, residue-inhibitor interactions spectra were obtained and several key residues contributing to favorable binding were highlighted, which provides valuable information for rational PI3Kγ inhibitor design and modification.
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Affiliation(s)
- Jingyu Zhu
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, China
| | - Kan Li
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou, China
| | - Jian Jin
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, China
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21
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Targeting oncogenic transcriptional corepressor Nac1 POZ domain with conformationally constrained peptides by cyclization and stapling. Bioorg Chem 2018; 80:1-10. [DOI: 10.1016/j.bioorg.2018.05.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/10/2018] [Accepted: 05/23/2018] [Indexed: 12/13/2022]
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22
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Wang L, Song T, Wang X, Li J. Discovery and Identification of Pyrazolopyramidine Analogs as Novel Potent Androgen Receptor Antagonists. Front Pharmacol 2018; 9:864. [PMID: 30210333 PMCID: PMC6121070 DOI: 10.3389/fphar.2018.00864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 07/17/2018] [Indexed: 01/21/2023] Open
Abstract
Androgen receptor (AR), an important target in the current androgen derivation therapy, plays a critical role in the development and progress of prostate cancer (PCa). Nonsteroidal antiandrogens, such as enzalutamide and bicalutamide, are commonly used in clinic to treat PCa. Though they are very effective at the beginning, drug resistance problem appears after about 18 months. One of the reasons is that these antiandrogens share similar structure skeleton. Therefore, it is urgent to discover novel antiandrogens with different skeletons for resistance problem. Herein, we combined structure- and ligand-based methodologies for virtual screening chemical databases to identify potent AR antagonists. Then the cytotoxic activities of the screened hit samples were evaluated by using LNCaP prostate cancer cells. Virtual screening and biological evaluation assay results suggest that several chemicals with novel pyrazolopyrimidine skeleton can inhibit the proliferation of prostate cancer cells with similar, or even higher, bioactivities to bicalutamide. AR reporter gene assay experiments proved that Compound III showed potential antagonistic effects. In addition, molecular dynamics simulations results proved that Compound III can properly bind to AR and prevent helix 12 (H12) from closing to distort the formation of activation function 2 (AF2) site, resulting in the invalid transcription. Hence, pyrazolopyrimidine was discovered as a novel, potent and promising antiandrogen skeleton deserved to be further studied.
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Affiliation(s)
- Lingyan Wang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Tianqing Song
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Xin Wang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Jiazhong Li
- School of Pharmacy, Lanzhou University, Lanzhou, China
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23
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Huang X, Xu P, Cao Y, Liu L, Song G, Xu L. Exploring the binding mechanisms of PDE5 with chromeno[2,3- c]pyrrol-9(2 H)-one by theoretical approaches. RSC Adv 2018; 8:30481-30490. [PMID: 35546827 PMCID: PMC9085377 DOI: 10.1039/c8ra06405a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 08/17/2018] [Indexed: 01/10/2023] Open
Abstract
Cyclic nucleotide phosphodiesterase type 5 (PDE5), exclusively specific for the cyclic guanosine monophosphate (cGMP), is an important drug target for the treatment of erectile dysfunction and pulmonary arterial hypertension (PAH). Although many PDE5 inhibitors have been approved, such as sildenafil, vardenafil, tadalafil and so on, extensive studies have reported some side effects, such as vision disturbance and hearing loss as a result of the amino acid sequence and the secondary structural similarity of other PDEs to the catalytic domain of PDE5. In this study, multiple docking strategies, molecular dynamics (MD) simulations, free energy calculations and decomposition were employed to explore the structural determinants of PDE5 with a series of chromeno[2,3-c]pyrrol-9(2H)-one derivatives. First, reliable docking results were obtained using quantum mechanics/molecular mechanics (QM/MM) docking. Then, MD simulations and MM/GBSA free energy calculations were used to explore the dynamic binding process and characterize the binding modes of the inhibitors with different activities. The predicted binding free energies are in good agreement with the experimental data, and the MM/GBSA free energy decomposition analysis sheds light on the importance of hydrogen bonds with Gln817, π-π stacks against Phe820 and hydrophobic residues for the PDE5 binding of the studied inhibitors. The structural and energetic insights obtained here are useful for understanding the molecular mechanism of ligand binding and designing novel potent and selective PDE5 inhibitors with new scaffolds.
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Affiliation(s)
- Xianfeng Huang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University Changzhou Jiangsu 213164 PR China +86-519-86334598 +86-519-86330600
| | - Peng Xu
- Department of Orthopedics, Second Military Medical University Affiliated Changzheng Hospital Shanghai 200003 China
| | - Yijing Cao
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University Changzhou Jiangsu 213164 PR China +86-519-86334598 +86-519-86330600
| | - Li Liu
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University Changzhou Jiangsu 213164 PR China +86-519-86334598 +86-519-86330600
| | - Guoqiang Song
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University Changzhou Jiangsu 213164 PR China +86-519-86334598 +86-519-86330600
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology Changzhou 213001 China +86-519-86953223 +86-519-86953220
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24
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Xu L, Li D, Ding J, Pan L, Ding X. Insight into tetrodotoxin blockade and resistance mechanisms of Na v 1.2 sodium channel by theoretical approaches. Chem Biol Drug Des 2018; 92:1445-1457. [PMID: 29673065 DOI: 10.1111/cbdd.13310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/08/2018] [Accepted: 03/17/2018] [Indexed: 11/30/2022]
Abstract
Nav 1.2, a member of voltage-gated sodium channels (Nav s) that are responsible for the generation and propagation of action potentials along the cell membrane, and play a vital role in the process of information transmission within the nervous system and muscle contraction, is preferentially expressed in the central nervous system. As a potent and selective blocker of Nav s, tetrodotoxin (TTX) has been extensively studied in biological and chemical sciences, whereas the detailed mechanism by which it blocks nine Nav 1 channel subtypes remain elusive. Despite the high structural similarity, the TTX metabolite 4,9-anhydro-TTX is 161 times less effective toward the mammalian Nav 1.2, which puzzled us to ask a question why such a subtle structural variation results in the largely binding affinity difference. In the current work, an integrated computational strategy, including homology modeling, induced fit docking, explicit-solvent MD simulations, and free energy calculations, was employed to investigate the binding mechanism and conformational determinants of TTX analogs. Based on the computational results, the H-bond interactions between C4-OH and C9-OH of TTX and the outer ring carboxylates of the selectivity-filter residues, and the cation-π interaction between the primary amine of guanidinium of TTX and Phe385 determine the difference of their binding affinities. Moreover, the computationally simulations were carried out for the D384N and E945K mutants of hNav 1.2-TTX, and the rank of the predicted binding free energies is in accordance with the experimental data. These observations provide a valuable model to design potent and selective neurotoxins of Nav 1.2 and shed light on the blocking mechanism of TTX to sodium channels.
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Affiliation(s)
- Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou, China
| | - Dayu Li
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
| | - Junjie Ding
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
| | - Li Pan
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
| | - Xiaoqin Ding
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
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25
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Tang X, Wang Z, Lei T, Zhou W, Chang S, Li D. Importance of protein flexibility on molecular recognition: modeling binding mechanisms of aminopyrazine inhibitors to Nek2. Phys Chem Chem Phys 2018; 20:5591-5605. [PMID: 29270587 DOI: 10.1039/c7cp07588j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
NIMA-related kinase 2 (Nek2) plays a significant role in cell cycle regulation, and overexpression of Nek2 has been observed in several types of carcinoma, suggesting it is a potential target for cancer therapy. In this study, we attempted to gain more insight into the binding mechanisms of a series of aminopyrazine inhibitors of Nek2 through multiple molecular modeling techniques, including molecular docking, molecular dynamics (MD) simulations and free energy calculations. The simulation results showed that the induced fit docking and ensemble docking based on multiple protein structures yield better predictions than conventional rigid receptor docking, highlighting the importance of incorporating receptor flexibility into the accurate predictions of the binding poses and binding affinities of Nek2 inhibitors. Additionally, we observed that the Molecular Mechanics/Generalized Born Surface Area (MM/GBSA) calculations did not show better performance than the docking scoring to rank the binding affinities of the studied inhibitors, suggesting that MM/GBSA is system-dependent and may not be the best choice for the Nek2 systems. Moreover, the detailed information on protein-ligand binding was characterized by the MM/GBSA free energy decomposition, and a number of derivatives with improved docking scores were designed. It is expected that our study can provide valuable information for the future rational design of novel and potent inhibitors of Nek2.
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Affiliation(s)
- Xinyi Tang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China.
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26
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Pan P, Yu H, Liu Q, Kong X, Chen H, Chen J, Liu Q, Li D, Kang Y, Sun H, Zhou W, Tian S, Cui S, Zhu F, Li Y, Huang Y, Hou T. Combating Drug-Resistant Mutants of Anaplastic Lymphoma Kinase with Potent and Selective Type-I 1/2 Inhibitors by Stabilizing Unique DFG-Shifted Loop Conformation. ACS CENTRAL SCIENCE 2017; 3:1208-1220. [PMID: 29202023 PMCID: PMC5704298 DOI: 10.1021/acscentsci.7b00419] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Indexed: 05/07/2023]
Abstract
Targeted inhibition of anaplastic lymphoma kinase (ALK) dramatically improved therapeutic outcomes in the treatment of ALK-positive cancers, but unfortunately patients invariably progressed due to acquired resistance mutations in ALK. Currently available drugs are all type-I inhibitors bound to the ATP-binding pocket and are most likely to be resistant in patients harboring genetic mutations surrounding the ATP pocket. To overcome drug resistance, we rationally designed a novel kind of "bridge" inhibitor, which specially bind into an extended hydrophobic back pocket adjacent to the ATP-binding site of ALK. The novel type-I1/2 inhibitors display excellent antiproliferation activity against ALK-positive cancer cells and appear superior to two clinically used drugs, crizotinib and ceritinib. Structural and molecular modeling analyses indicate that the inhibitor induces dramatic conformational transition and stabilizes unique DFG-shifted loop conformation, enabling persistent sensitivity to different genetic mutations in ALK. These data highlight a rationale for further development of next-generation ALK inhibitors to combat drug resistance.
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Affiliation(s)
- Peichen Pan
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Huidong Yu
- Rongene
Pharma Co., Ltd., Shenzhen, Guandong 518054, China
| | - Qinglan Liu
- Key
Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology,
Shenzhen Graduate School, Peking University, Shenzhen, Guangdong 518055, China
- Innovative
Drug R & D Center, Shenzhen Salubris
Pharmaceuticals Co., Ltd., Huabao Industrial Zone, Shenzhen 518102, China
| | - Xiaotian Kong
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Institute of Functional Nano and
Soft Materials (FUNSOM) and Jiangsu Key Laboratory
of Translational Research and Therapy for Neuropsychiatric Diseases
and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Hu Chen
- Key
Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology,
Shenzhen Graduate School, Peking University, Shenzhen, Guangdong 518055, China
| | - Jiean Chen
- Key
Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology,
Shenzhen Graduate School, Peking University, Shenzhen, Guangdong 518055, China
| | - Qi Liu
- Key
Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology,
Shenzhen Graduate School, Peking University, Shenzhen, Guangdong 518055, China
| | - Dan Li
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yu Kang
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Huiyong Sun
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wenfang Zhou
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Sheng Tian
- Institute of Functional Nano and
Soft Materials (FUNSOM) and Jiangsu Key Laboratory
of Translational Research and Therapy for Neuropsychiatric Diseases
and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Sunliang Cui
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Feng Zhu
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Youyong Li
- Institute of Functional Nano and
Soft Materials (FUNSOM) and Jiangsu Key Laboratory
of Translational Research and Therapy for Neuropsychiatric Diseases
and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yong Huang
- Key
Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology,
Shenzhen Graduate School, Peking University, Shenzhen, Guangdong 518055, China
| | - Tingjun Hou
- College of Pharmaceutical Sciences and State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
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27
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Structure-based rational design of peptide inhibitors to disrupt the recognition and interaction between hepatitis B virus large envelope protein and human hepatocyte receptor γ2-adaptin. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1981-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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28
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Structure-based design of competitive ligands to target Spon2 in gastric cancer: An integration of molecular modeling and in vitro assay. Bioorg Chem 2017; 74:115-121. [PMID: 28772159 DOI: 10.1016/j.bioorg.2017.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 07/16/2017] [Accepted: 07/17/2017] [Indexed: 11/21/2022]
Abstract
Spon2 is a proto-oncogene matrix protein that plays an essential role in the tumorigenesis and metastasis of gastric cancer. The protein has recently been found to function as a guanine nucleotide exchange factor through the activation of RhoGTPase. Here, computational modeling and bioinformatics analysis were employed to investigate the molecular mechanism and biological implication underlying Spon2 autoinhibition. It is revealed that the binding of PxxP motif to SH domain can stabilize the intramolecular interaction between the N-terminal helix and DH domain of Spon2, thus shifting the protein into an autoinhibitory state. Here, we proposed releasing Spon2 autoinhibition by targeting SH domain with competitive peptide ligands. To verify this notion, the PxxP sequence was adopted as the start to derive an array of efficient SH binders by using a structure-based rational design strategy, which were then substantiated with fluorescence spectroscopy analysis and guanine nucleotide exchange test. Consequently, the obtained peptide ligands were determined to have a moderate or high affinity for SH domain; they can also enhance Spon2 exchange activity by 1.2-6.1 folds, exhibiting a significant correlation with their SH-binding affinity (Pearson's coefficient=0.92). In addition, neutral substitution of conserved residues in a high-affinity peptide ligand can largely reduce its Spon2-activating potency, confirming that the designed peptide activates Spon2 by competitively disrupting SH-PxxP interaction.
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Yoshimaru T, Ono M, Bando Y, Chen YA, Mizuguchi K, Shima H, Komatsu M, Imoto I, Izumi K, Honda J, Miyoshi Y, Sasa M, Katagiri T. A-kinase anchoring protein BIG3 coordinates oestrogen signalling in breast cancer cells. Nat Commun 2017; 8:15427. [PMID: 28555617 PMCID: PMC5512694 DOI: 10.1038/ncomms15427] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 03/30/2017] [Indexed: 12/21/2022] Open
Abstract
Approximately 70% of breast cancer cells express oestrogen receptor alpha (ERα). Previous studies have shown that the Brefeldin A-inhibited guanine nucleotide-exchange protein 3–prohibitin 2 (BIG3-PHB2) complex has a crucial role in these cells. However, it remains unclear how BIG3 regulates the suppressive activity of PHB2. Here we demonstrate that BIG3 functions as an A-kinase anchoring protein that binds protein kinase A (PKA) and the α isoform of the catalytic subunit of protein phosphatase 1 (PP1Cα), thereby dephosphorylating and inactivating PHB2. E2-induced PKA-mediated phosphorylation of BIG3-S305 and -S1208 serves to enhance PP1Cα activity, resulting in E2/ERα signalling activation via PHB2 inactivation due to PHB2-S39 dephosphorylation. Furthermore, an analysis of independent cohorts of ERα-positive breast cancers patients reveal that both BIG3 overexpression and PHB2-S39 dephosphorylation are strongly associated with poor prognosis. This is the first demonstration of the mechanism of E2/ERα signalling activation via the BIG3–PKA–PP1Cα tri-complex in breast cancer cells. BIG3 is highly expressed in breast cancers and its interaction with PHB2 results in constitutive activation of E2/ERa signalling. Here the authors unveil the mechanistic details of this regulation showing that BIG3 binds PKA and regulates PP1Ca activity in an oestrogen-dependent manner.
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Affiliation(s)
- Tetsuro Yoshimaru
- Division of Genome Medicine, Institute for Genome Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Masaya Ono
- Division of Chemotherapy and Clinical Research, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Yoshimi Bando
- Division of Pathology, Tokushima University Hospital, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Yi-An Chen
- National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
| | - Kenji Mizuguchi
- National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
| | - Hiroshi Shima
- Division of Cancer Chemotherapy, Miyagi Cancer Center Research Institute, 47-1 Nodayama, Medeshimashiote, Natori, Miyagi 981-1293, Japan
| | - Masato Komatsu
- Division of Genome Medicine, Institute for Genome Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Issei Imoto
- Department of Human Genetics, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Keisuke Izumi
- Department of Molecular and Environmental Pathology, Graduate School of Medicine, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Junko Honda
- Department of Surgery, National Hospital Organization Higashitokushima Medical Center, 1-1 Ohmukai-kita, Ootera, Itano, Tokushima 779-0193, Japan
| | - Yasuo Miyoshi
- Department of Surgery, Division of Breast and Endocrine Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Mitsunori Sasa
- Department of Surgery, Tokushima Breast Care Clinic, 4-7-7 Nakashimada-cho, Tokushima 770-0052, Japan
| | - Toyomasa Katagiri
- Division of Genome Medicine, Institute for Genome Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
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The electronic density obtained from a QTAIM analysis used as molecular descriptor. A study performed in a new series of DHFR inhibitors. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Zhao S, Zhu J, Xu L, Jin J. Theoretical studies on the selective mechanisms of GSK3β and CDK2 by molecular dynamics simulations and free energy calculations. Chem Biol Drug Des 2016; 89:846-855. [PMID: 27863047 DOI: 10.1111/cbdd.12907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 10/30/2016] [Accepted: 10/31/2016] [Indexed: 01/09/2023]
Abstract
Glycogen synthase kinase 3 (GSK3) is a serine/threonine protein kinase which is widely involved in cell signaling and controls a broad number of cellular functions. GSK3 contains α and β isoforms, and GSK3β has received more attention and becomes an attractive drug target for the treatment of several diseases. The binding pocket of cyclin-dependent kinase 2 (CDK2) shares high sequence identity to that of GSK3β, and therefore, the design of highly selective inhibitors toward GSK3β remains a big challenge. In this study, a computational strategy, which combines molecular docking, molecular dynamics simulations, free energy calculations, and umbrella sampling simulations, was employed to explore the binding mechanisms of two selective inhibitors to GSK3β and CDK2. The simulation results highlighted the key residues critical for GSK3β selectivity. It was observed that although GSK3β and CDK2 share the conserved ATP-binding pockets, some different residues have significant contributions to protein selectivity. This study provides valuable information for understanding the GSK3β-selective binding mechanisms and the rational design of selective GSK3β inhibitors.
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Affiliation(s)
- Sufang Zhao
- Department of Gastroenterology, The 2nd Hospital of Shenzhen (The First Affiliated Hospital of Shenzhen University), ShenZhen, Guangdong, China
| | - Jingyu Zhu
- School of Medicine and Pharmaceutics, Jiangnan University, Wuxi, Jiangsu, China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou, China
| | - Jian Jin
- School of Medicine and Pharmaceutics, Jiangnan University, Wuxi, Jiangsu, China
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Pan P, Sun H, Liu H, Li D, Zhou W, Kong X, Li Y, Yu H, Hou T. In Silico Exploration for Novel Type-I Inhibitors of Tie-2/TEK: The Performance of Different Selection Strategy in Selecting Virtual Screening Candidates. Sci Rep 2016; 6:37628. [PMID: 27876862 PMCID: PMC5120310 DOI: 10.1038/srep37628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/21/2016] [Indexed: 12/14/2022] Open
Abstract
The receptor tyrosine kinase Tie-2 is involved in vessel remodeling and maturation, and has been regarded as a potential target for the treatment of various solid tumors. The absence of novel, potent and selective inhibitors severely hampers the understanding of the therapeutic potential of Tie-2. In the present work, we describe the discovery of novel type-I inhibitors of Tie-2 by structure-based virtual screening. Preliminary SAR was also performed based on one active compound, and several novel inhibitors with low micro-molar affinity were discovered. To directly compare the efficiency between different filtering strategies in selecting VS candidates, two methods were separately carried out to screen the same chemical library, and the selected VS candidates were then experimentally assessed by in vitro enzymatic assays. The results demonstrate that the hit rate is improved when stricter drug-likeness criteria and less number of molecules for clustering analysis are used, and meanwhile, the molecular diversity of the compounds still maintains. As a case study of TIE-2, the information presented in this work underscores the importance of selecting an appropriate selection strategy in VS campaign, and the novel inhibitors identified and the detailed binding modes of action provide a starting point for further hit-to-lead optimization process.
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Affiliation(s)
- Peichen Pan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Huiyong Sun
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hui Liu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Dan Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wenfang Zhou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaotian Kong
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
| | - Youyong Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
| | - Huidong Yu
- Rongene Pharma Co., Ltd., International Business Incubator, Guangzhou Science Town, Guangdong 510663, China
| | - Tingjun Hou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.,State Key Lab of CAD&CG, Zhejiang University, Hangzhou, Zhejiang 310058, China
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Cui F, Liu L, Tang H, Yang K, Li Y. Construction of explicit models to correlate the structure and the inhibitory activity of aldose reductase: Flavonoids and sulfonyl-pyridazinones as inhibitors. Chem Biol Drug Des 2016; 89:482-491. [PMID: 27637378 DOI: 10.1111/cbdd.12868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/20/2016] [Accepted: 09/08/2016] [Indexed: 11/29/2022]
Abstract
The correlation between binding energies and bioactivities is the core of structure-based computer-aided drug design. However, many models to address this correlation are still strongly system-dependent at current stage. We constructed two explicit models to correlate the binding energies with the inhibitory activities of flavonoids and sulfonyl-pyridazinones as inhibitors of aldose reductase. The introduction of multiple complex states comprised of protein, coenzyme, substrate, and inhibitor can remarkably improve the correlation coefficients, compared with that using single complex state. Recombination of energy terms from complex structures and molecular descriptors of inhibitors can further improve the correlation. The explicit models provide correlation coefficients of 0.90 and 0.92 for flavonoids and sulfonyl-pyridazinones, respectively. These models also steadily present the contribution from each energy term and the favorite of protein-inhibitor complex states. Meanwhile, we also observed that some inhibitors can accommodate alternative sites out of the conserved binding pocket at the presence/absence of coenzyme and substrate. It is responsible for the remarkable change in the binding energies and thus significantly influences the correlation between the structures and the inhibitory activities. Overall, this work presents a rational way to construct reliable explicit models through the combination of multiple physically accessible complex states, even though each of them only bears marginal information related to their activities.
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Affiliation(s)
- Fengchao Cui
- Key Laboratory of Synthetic Rubber and Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, China
| | - Lunyang Liu
- Key Laboratory of Synthetic Rubber and Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, China
| | - Haifeng Tang
- Key Laboratory of Synthetic Rubber and Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, China
| | - Kecheng Yang
- Key Laboratory of Synthetic Rubber and Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, China
| | - Yunqi Li
- Key Laboratory of Synthetic Rubber and Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, China
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Zhou D, Chen J, Xu Y. Identification of potential quinoxalinone-based aldose reductase inhibitors by 3D-QSAR, molecular docking and molecular dynamics. RSC Adv 2016. [DOI: 10.1039/c6ra05649k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The 3D-QSAR model of aldose reductase (ARIs) inhibitors is built to gain insights into the key structural factors affecting the inhibitory activity. Based on the model, six new potential ARIs were designed.
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Affiliation(s)
- Dan Zhou
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Jianbo Chen
- College of Life and Environmental Sciences
- Shanghai Normal University
- Shanghai 200234
- China
| | - Yi Xu
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
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35
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Xu L, Li D, Tao L, Yang Y, Li Y, Hou T. Binding mechanisms of 1,4-dihydropyridine derivatives to L-type calcium channel Cav1.2: a molecular modeling study. MOLECULAR BIOSYSTEMS 2016; 12:379-90. [DOI: 10.1039/c5mb00781j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
L-type Ca2+channels (LTCCs), the heteromultimeric proteins, are associated with electrical signaling and provide the key link between electrical signals and non-electrical processes.
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Affiliation(s)
- Lei Xu
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou
- China
- Institute of Bioinformatics and Medical Engineering
| | - Dan Li
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou
- China
| | - Li Tao
- Shi Hui Da Medical & Pharmaceutical Research Institute
- Shanghai 200433
- China
| | - Yanling Yang
- Shi Hui Da Medical & Pharmaceutical Research Institute
- Shanghai 200433
- China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Soochow University
- Suzhou
- China
| | - Tingjun Hou
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou
- China
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36
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Pan P, Tian S, Sun H, Kong X, Zhou W, Li D, Li Y, Hou T. Identification and Preliminary SAR Analysis of Novel Type-I Inhibitors of TIE-2 via Structure-Based Virtual Screening and Biological Evaluation in in vitro Models. J Chem Inf Model 2015; 55:2693-704. [DOI: 10.1021/acs.jcim.5b00576] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | - Sheng Tian
- Institute
of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
| | | | - Xiaotian Kong
- Institute
of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
| | | | | | - Youyong Li
- Institute
of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
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37
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Peng M, Aye TT, Snel B, van Breukelen B, Scholten A, Heck AJR. Spatial Organization in Protein Kinase A Signaling Emerged at the Base of Animal Evolution. J Proteome Res 2015; 14:2976-87. [DOI: 10.1021/acs.jproteome.5b00370] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mao Peng
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
- Netherlands Proteomics Centre, Padualaan
8, 3584 CH Utrecht, The Netherlands
- Department
of Toxicogenomics, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Thin Thin Aye
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
- Netherlands Proteomics Centre, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Berend Snel
- Theoretical
Biology and Bioinformatics, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Bas van Breukelen
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
- Netherlands Proteomics Centre, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Arjen Scholten
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
- Netherlands Proteomics Centre, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Albert J. R. Heck
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
- Netherlands Proteomics Centre, Padualaan
8, 3584 CH Utrecht, The Netherlands
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Ning J, Wu Q, Liu Z, Wang J, Lin X. Mapping inhibitor response to the in-frame deletions, insertions and duplications of epidermal growth factor receptor (EGFR) in non-small cell lung cancer. J Recept Signal Transduct Res 2015; 36:37-44. [PMID: 26096169 DOI: 10.3109/10799893.2015.1015739] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Human epidermal growth factor receptor (EGFR) has become a well-established target for the treatment of non-small cell lung cancer (NSCLC). However, a large number of in-frame deletion, insertion and duplication mutations in the EGFR tyrosine kinase (TK) domain have been observed to alter drug response to such a kinase target. Thus, a systematic investigation of the intermolecular interactions between the clinical small-molecule agents and various EGFR in-frame mutants would help to establish a complete picture of drug response to kinase mutations in lung cancer, and to design new EGFR inhibitors with high potency and selectivity to target drug-resistant mutants. Here, we describe a combined pipeline to explore the drug response of five representative EGFR inhibitors, including three FDA-approved agents (gefitinib, erlotinib and lapatinib) and two compounds under clinical development (AEE788 and TAK-285) to a number of clinically relevant EGFR in-frame mutations, aiming at a comprehensive understanding of molecular mechanism and biological implication underlying drug resistance and sensitivity to EGFR in-frame mutations. It was found that the insertion and duplication mutations in exon 20 can generally cause drug resistance to EGFR due to the reduced size of kinase's active pocket, while deletion mutations in exon 19 associate closely with increased inhibitor sensitivity to EGFR by establishing additional non-bonded interactions across complex interface, including hydrogen bonds, cation-π interactions and hydrophobic contacts.
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Affiliation(s)
- Jingheng Ning
- a Department of Chemistry , Zhejiang University , Hangzhou , P. R. China .,b School of Chemical and Biological Engineering, Changsha University of Science & Technology , Changsha , P. R. China , and
| | - Qi Wu
- a Department of Chemistry , Zhejiang University , Hangzhou , P. R. China
| | - Zhenguo Liu
- c Department of Infectious Diseases , The Third Xiangya Hospital, Central South University , Changsha , P. R. China
| | - Jianhui Wang
- b School of Chemical and Biological Engineering, Changsha University of Science & Technology , Changsha , P. R. China , and
| | - Xianfu Lin
- a Department of Chemistry , Zhejiang University , Hangzhou , P. R. China
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Sun H, Li Y, Tian S, Xu L, Hou T. Assessing the performance of MM/PBSA and MM/GBSA methods. 4. Accuracies of MM/PBSA and MM/GBSA methodologies evaluated by various simulation protocols using PDBbind data set. Phys Chem Chem Phys 2015; 16:16719-29. [PMID: 24999761 DOI: 10.1039/c4cp01388c] [Citation(s) in RCA: 553] [Impact Index Per Article: 61.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
By using different evaluation strategies, we systemically evaluated the performance of Molecular Mechanics/Generalized Born Surface Area (MM/GBSA) and Molecular Mechanics/Poisson-Boltzmann Surface Area (MM/PBSA) methodologies based on more than 1800 protein-ligand crystal structures in the PDBbind database. The results can be summarized as follows: (1) for the one-protein-family/one-binding-ligand case which represents the unbiased protein-ligand complex sampling, both MM/GBSA and MM/PBSA methodologies achieve approximately equal accuracies at the interior dielectric constant of 4 (with rp = 0.408 ± 0.006 of MM/GBSA and rp = 0.388 ± 0.006 of MM/PBSA based on the minimized structures); while for the total dataset (1864 crystal structures), the overall best Pearson correlation coefficient (rp = 0.579 ± 0.002) based on MM/GBSA is better than that of MM/PBSA (rp = 0.491 ± 0.003), indicating that biased sampling may significantly affect the accuracy of the predicted result (some protein families contain too many instances and can bias the overall predicted accuracy). Therefore, family based classification is needed to evaluate the two methodologies; (2) the prediction accuracies of MM/GBSA and MM/PBSA for different protein families are quite different with rp ranging from 0 to 0.9, whereas the correlation and ranking scores (an averaged rp/rs over a list of protein folds and also representing the unbiased sampling) given by MM/PBSA (rp-score = 0.506 ± 0.050 and rs-score = 0.481 ± 0.052) are comparable to those given by MM/GBSA (rp-score = 0.516 ± 0.047 and rs-score = 0.463 ± 0.047) at the fold family level; (3) for the overall prediction accuracies, molecular dynamics (MD) simulation may not be quite necessary for MM/GBSA (rp-minimized = 0.579 ± 0.002 and rp-1ns = 0.564 ± 0.002), but is needed for MM/PBSA (rp-minimized = 0.412 ± 0.003 and rp-1ns = 0.491 ± 0.003). However, for the individual systems, whether to use MD simulation is depended. (4) both MM/GBSA and MM/PBSA may be unable to give successful predictions for the ligands with high formal charges, with the Pearson correlation coefficient ranging from 0.621 ± 0.003 (neutral ligands) to 0.125 ± 0.142 (ligands with a formal charge of 5). Therefore, it can be summarized that, although MM/GBSA and MM/PBSA perform similarly in the unbiased dataset, for the currently available crystal structures in the PDBbind database, compared with MM/GBSA, which may be used in multi-target comparisons, MM/PBSA is more sensitive to the investigated systems, and may be more suitable for individual-target-level binding free energy ranking. This study may provide useful guidance for the post-processing of docking based studies.
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Affiliation(s)
- Huiyong Sun
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China.
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40
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Cui F, Yang K, Li Y. Investigate the binding of catechins to trypsin using docking and molecular dynamics simulation. PLoS One 2015; 10:e0125848. [PMID: 25938485 PMCID: PMC4418572 DOI: 10.1371/journal.pone.0125848] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/25/2015] [Indexed: 01/31/2023] Open
Abstract
To explore the inhibitory mechanism of catechins for digestive enzymes, we investigated the binding mode of catechins to a typical digestive enzyme-trypsin and analyzed the structure-activity relationship of catechins, using an integration of molecular docking, molecular dynamics simulation and binding free energy calculation. We found that catechins with different structures bound to a conservative pocket S1 of trypsin, which is comprised of residues 189–195, 214–220 and 225–228. In the trypsin-catechin complexes, Asp189 by forming strong hydrogen bonding, and Gln192, Trp215 and Gly216 through hydrophobic interactions, all significantly contribute to the binding of catechins. The number and the position of hydroxyl and aromatic groups, the structure of stereoisomers, and the orientation of catechins in the binding pocket S1 of trypsin all affect the binding affinity. The binding affinity is in the order of Epigallocatechin gallate (EGCG) > Epicatechin gallate (ECG) > Epicatechin (EC) > Epigallocatechin (EGC), and 2R-3R EGCG shows the strongest binding affinity out of other stereoisomers. Meanwhile, the synergic conformational changes of residues and catechins were also analyzed. These findings will be helpful in understanding the knowledge of interactions between catechins and trypsin and referable for the design of novel polyphenol based functional food and nutriceutical formulas.
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Affiliation(s)
- Fengchao Cui
- Key Laboratory of Synthetic Rubber & Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, P. R. China
| | - Kecheng Yang
- Key Laboratory of Synthetic Rubber & Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, P. R. China
| | - Yunqi Li
- Key Laboratory of Synthetic Rubber & Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, P. R. China
- * E-mail:
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The auto-inhibitory state of Rho guanine nucleotide exchange factor ARHGEF5/TIM can be relieved by targeting its SH3 domain with rationally designed peptide aptamers. Biochimie 2015; 111:10-8. [DOI: 10.1016/j.biochi.2015.01.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/22/2015] [Indexed: 11/20/2022]
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Xu L, Li Y, Li D, Xu P, Tian S, Sun H, Liu H, Hou T. Exploring the binding mechanisms of MIF to CXCR2 using theoretical approaches. Phys Chem Chem Phys 2014; 17:3370-82. [PMID: 25526079 DOI: 10.1039/c4cp05095a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Macrophage migration inhibitory factor (MIF) is a multi-functional protein that acts as a cytokine and as an enzyme. Recently, MIF was identified as a non-canonical ligand of G protein-coupled chemokine receptor CXCR2 with low nanomolar affinity in leukocyte arrest and chemotaxis, but the precise knowledge of the molecular determinants of the MIF-CXCR2 interface has remained unknown. Therefore, we employed homology modeling, protein-protein docking, molecular dynamics (MD) simulations, Molecular Mechanics/Generalized Born Surface Area (MM/GBSA) binding free energy calculations and MM/GBSA binding free energy decomposition to obtain insights into the molecular recognition of MIF with CXCR2. The predicted binding pattern of MIF-CXCR2 is in good agreement with the experimental data and sheds light on the functional role of important MIF-CXCR2 interface residues in association with binding and signaling. According to our predictions, the R11A/D44A double mutations of MIF exhibit a pronounced defect in the binding affinity of MIF to CXCR2, resulting in large conformational changes. The potential two-site binding model for the MIF-CXCR2 recognition was proposed: initialized primarily by the non-polar interactions including the van der Waals and hydrophobic interactions, the N-terminal region of CXCR2 contacts the N-like loop and β-sheet of MIF (site 1), and then the ECL2 and ECL3 regions of CXCR2 form strong interactions with the pseudo-(E)LR motif and C-terminus of MIF, which induces the molecular thermodynamic motion of TMs for signal transduction (site 2). This study will extend our understanding to the binding mechanisms of MIF to CXCR2 and provide useful information for the rational design of potent inhibitors selectively targeting the MIF-CXCR2 interactions.
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Affiliation(s)
- Lei Xu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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43
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Chen J, Tang YY, Chen CLP, Fang B, Lin Y, Shang Z. Multi-Label Learning With Fuzzy Hypergraph Regularization for Protein Subcellular Location Prediction. IEEE Trans Nanobioscience 2014; 13:438-47. [DOI: 10.1109/tnb.2014.2341111] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Wang X, Pan P, Li Y, Li D, Hou T. Exploring the prominent performance of CX-4945 derivatives as protein kinase CK2 inhibitors by a combined computational study. MOLECULAR BIOSYSTEMS 2014; 10:1196-210. [PMID: 24647611 DOI: 10.1039/c4mb00013g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Protein kinase CK2, also known as casein kinase II, is related to various cellular events and is a potential target for numerous cancers. In this study, we attempted to gain more insight into the inhibition process of CK2 by a series of CX-4945 derivatives through an integrated computational study that combines molecular docking, molecular dynamics (MD) simulations, and binding free energy calculations. Based on the binding poses predicted by molecular docking, the MD simulations were performed to explore the dynamic binding processes for ten selected inhibitors. Then, both Molecular Mechanics/Poisson Boltzmann Surface Area (MM/PBSA) and Molecular Mechanics/Generalized Born Surface Area (MM/GBSA) techniques were employed to predict the binding affinities of the studied systems. The predicted binding energies of the selected inhibitors correlate well with their experimental activities (r(2) = 0.78). The van der Waals term is the most favorable component for the total energies. The free energy decomposition on a per residue basis reveals that the residue K68 is essential for the electrostatic interactions between CK2 and the studied inhibitors and numerous residues, including L45, V53, V66, F113, M163 and I174, play critical roles in forming van der Waals interactions with the inhibitors. Finally, a number of new derivatives were designed and the binding affinity and the predicted binding free energies of each designed molecule were obtained on the basis of molecular docking and MM/PBSA. It is expected that our research will benefit the future rational design of novel and potent inhibitors of CK2.
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Affiliation(s)
- Xuwen Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
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45
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Xu K, Qi H. Sperm-specific AKAP3 is a dual-specificity anchoring protein that interacts with both protein kinase a regulatory subunits via conserved N-terminal amphipathic peptides. Mol Reprod Dev 2014; 81:595-607. [PMID: 24687590 DOI: 10.1002/mrd.22329] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 03/22/2014] [Indexed: 11/06/2022]
Abstract
cAMP-dependent protein kinase A (PKA) plays important regulatory roles during mouse spermatogenesis. PKA-mediated signaling has been shown to regulate gene expression, chromatin condensation, capacitation, and motility during sperm development and behavior, although how PKA is regulated in spatiotemporal manners during spermatogenesis is not fully understood. In the present study, we found that PKA subunit isoforms are expressed and localized differently in meiotic and post-meiotic mouse spermatogenic cells. Regulatory subunit I alpha (RIα) is expressed in spermatocytes and round spermatids, where it is localized diffusely throughout the cytoplasm of cells. During late spermiogenesis, RIα abundance gradually decreases. On the other hand, RIIα is expressed constantly throughout meiotic and post-meiotic stages, and is associated with cytoskeletal structures. Among several A kinase anchoring proteins (AKAPs) expressed in the testis, sperm-specific AKAP3 can be found in the cytoplasm of elongating spermatids and interacts with RIα, as demonstrated by both in vivo and in vitro experiments. In mature sperm, AKAP3 is exclusively found in the principal piece of the flagellum, coincident with only RIIα. Mutagenesis experiments further showed that the preferential interactions of AKAP3 with PKA regulatory subunits are mediated by two highly conserved amphipathic peptides located in the N-terminal region of AKAP3. Thus, AKAP3 is a dual-specificity molecule that modulates PKA isotypes in a spatiotemporal manner during mouse spermatogenesis.
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Affiliation(s)
- Kaibiao Xu
- Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
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46
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Xu L, Zhang Y, Zheng L, Qiao C, Li Y, Li D, Zhen X, Hou T. Discovery of Novel Inhibitors Targeting the Macrophage Migration Inhibitory Factor via Structure-Based Virtual Screening and Bioassays. J Med Chem 2014; 57:3737-45. [DOI: 10.1021/jm401908w] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lei Xu
- College
of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, People’s Republic of China
| | | | | | | | | | - Dan Li
- College
of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, People’s Republic of China
| | | | - Tingjun Hou
- College
of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, People’s Republic of China
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47
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Shen M, Zhou S, Li Y, Li D, Hou T. Theoretical study on the interaction of pyrrolopyrimidine derivatives as LIMK2 inhibitors: insight into structure-based inhibitor design. MOLECULAR BIOSYSTEMS 2014; 9:2435-46. [PMID: 23881296 DOI: 10.1039/c3mb70168a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
LIM kinases (LIMKs), downstream of Rho-associated protein kinases (ROCKs) and p21-activated protein kinases (PAKs), are shown to be promising targets for the treatment of cancers. In this study, the inhibition mechanism of 41 pyrrolopyrimidine derivatives as LIMK2 inhibitors was explored through a series of theoretical approaches. First, a model of LIMK2 was generated through molecular homology modeling, and the studied inhibitors were docked into the binding active site of LIMK2 by the docking protocol, taking into consideration the flexibility of the protein. The binding poses predicted by molecular docking for 17 selected inhibitors with different bioactivities complexed with LIMK2 underwent molecular dynamics (MD) simulations, and the binding free energies for the complexes were predicted by using the molecular mechanics/generalized born surface area (MM/GBSA) method. The predicted binding free energies correlated well with the experimental bioactivities (r(2) = 0.63 or 0.62). Next, the free energy decomposition analysis was utilized to highlight the following key structural features related to biological activity: (1) the important H-bond between Ile408 and pyrrolopyrimidine, (2) the H-bonds between the inhibitors and Asp469 and Gly471 which maintain the stability of the DFG-out conformation, and (3) the hydrophobic interactions between the inhibitors and several key residues (Leu337, Phe342, Ala345, Val358, Lys360, Leu389, Ile408, Leu458 and Leu472). Finally, a variety of LIMK2 inhibitors with a pyrrolopyrimidine scaffold were designed, some of which showed improved potency according to the predictions. Our studies suggest that the use of molecular docking with MD simulations and free energy calculations could be a powerful tool for understanding the binding mechanism of LIMK2 inhibitors and for the design of more potent LIMK2 inhibitors.
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Affiliation(s)
- Mingyun Shen
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
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48
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Zhu J, Pan P, Li Y, Wang M, Li D, Cao B, Mao X, Hou T. Theoretical studies on beta and delta isoform-specific binding mechanisms of phosphoinositide 3-kinase inhibitors. MOLECULAR BIOSYSTEMS 2013; 10:454-66. [PMID: 24336903 DOI: 10.1039/c3mb70314b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Phosphoinositide 3-kinase (PI3K) is known to be closely related to tumorigenesis and cell proliferation, and controls a variety of cellular processes, including proliferation, growth, apoptosis, migration, metabolism, etc. The PI3K family comprises eight catalytic isoforms, which are subdivided into three classes. Recently, the discovery of inhibitors that block a single isoform of PI3K has continued to attract special attention because they may have higher selectivity for certain tumors and less toxicity for healthy cells. The PI3Kβ and PI3Kδ share fewer studies than α/γ, and therefore, in this work, the combination of molecular dynamics simulations and free energy calculations was employed to explore the binding of three isoform-specific PI3K inhibitors (COM8, IC87114, and GDC-0941) to PI3Kβ or PI3Kδ. The isoform specificities of the studied inhibitors derived from the predicted binding free energies are in good agreement with the experimental data. In addition, the key residues critical for PI3Kβ or PI3Kδ selectivity were highlighted by decomposing the binding free energies into the contributions from individual residues. It was observed that although PI3Kβ and PI3Kδ share the conserved ATP-binding pockets, individual residues do behave differently, particularly the residues critical for PI3Kβ or PI3Kδ selectivity. It can be concluded that the inhibitor specificity between PI3Kβ and PI3Kδ is determined by the additive contributions from multiple residues, not just a single one. This study provides valuable information for understanding the isoform-specific binding mechanisms of PI3K inhibitors, and should be useful for the rational design of novel and selective PI3K inhibitors.
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Affiliation(s)
- Jingyu Zhu
- Cyrus Tang Hematology Center, Soochow University, Suzhou, Jiangsu 215123, China.
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49
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Sun HY, Ji FQ, Fu LY, Wang ZY, Zhang HY. Structural and Energetic Analyses of SNPs in Drug Targets and Implications for Drug Therapy. J Chem Inf Model 2013; 53:3343-51. [DOI: 10.1021/ci400457v] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Hui-Yong Sun
- National
Key Laboratory of Crop Genetic Improvement, Center for Bioinformatics, College of Life
Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China
- School
of Life Sciences, Shandong University of Technology, Zibo 255049, P.R. China
| | - Feng-Qin Ji
- National
Key Laboratory of Crop Genetic Improvement, Center for Bioinformatics, College of Life
Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Liang-Yu Fu
- National
Key Laboratory of Crop Genetic Improvement, Center for Bioinformatics, College of Life
Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Zhong-Yi Wang
- National
Key Laboratory of Crop Genetic Improvement, Center for Bioinformatics, College of Life
Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Hong-Yu Zhang
- National
Key Laboratory of Crop Genetic Improvement, Center for Bioinformatics, College of Life
Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China
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Zhang Q, Wang J, Guerrero GD, Cecilia JM, García JM, Li Y, Pérez-Sánchez H, Hou T. Accelerated Conformational Entropy Calculations Using Graphic Processing Units. J Chem Inf Model 2013; 53:2057-64. [DOI: 10.1021/ci400263t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qian Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Junmei Wang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Ginés D. Guerrero
- Computer
Engineering Department, School of Computer Science, 30100 University of Murcia, Spain
| | - José M. Cecilia
- Computer
Science Department, 30107 Catholic University of Murcia (UCAM), Spain
| | - José M. García
- Computer
Engineering Department, School of Computer Science, 30100 University of Murcia, Spain
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | | | - Tingjun Hou
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
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