51
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Toward Commercialization. Drug Deliv 2016. [DOI: 10.1201/9781315382579-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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52
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Exploring the inhibitory potential of bioactive compound from Luffa acutangula against NF-κB—A molecular docking and dynamics approach. Comput Biol Chem 2016; 62:29-35. [DOI: 10.1016/j.compbiolchem.2016.03.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/23/2016] [Accepted: 03/27/2016] [Indexed: 12/25/2022]
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53
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Huang NY, Wang WB, Chen L, Luo HJ, Wang JZ, Deng WQ, Zou K. Design, synthesis and biological evaluation of bisabolangelone oxime derivatives as potassium-competitive acid blockers (P-CABs). Bioorg Med Chem Lett 2016; 26:2268-72. [DOI: 10.1016/j.bmcl.2016.03.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 02/29/2016] [Accepted: 03/14/2016] [Indexed: 10/22/2022]
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54
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Pardeshi CV, Belgamwar VS. Ropinirole-dextran sulfate nanoplex for nasal administration against Parkinson's disease: in silico molecular modeling and in vitro-ex vivo evaluation. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:635-648. [PMID: 27068140 DOI: 10.3109/21691401.2016.1167703] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Dextran sulfate sodium (DS) was allowed to interact ionically with ropinirole hydrochloride (ROPI HCl, an anti-Parkinsonian agent) to synthesize self-assembled ROPI-DS nanoplex. The preliminary objective behind ROPI-DS complexation was to enhance the partitioning of ROPI HCl and thereby its encapsulation into nanocarriers and to improve the nasal membrane permeability. Molecular interactions were computed using in silico molecular modeling. Nanoplex were characterized for physicochemical and partitioning behavior. Optimized ROPI-DS nanoplex was further characterized by spectroscopic and thermal analysis, diffraction studies, morphological and histopathological analysis. In summary, ROPI-DS nanoplex represents a promising nanocarrier material for intranasal administration.
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Affiliation(s)
- Chandrakantsing Vijaysing Pardeshi
- a Industrial Pharmacy Laboratory, Department of Pharmaceutics , R. C. Patel Institute of Pharmaceutical Education and Research , Shirpur , Maharashtra , India
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Sweidan K, Sabbah DA, Bardaweel S, Dush KA, Sheikha GA, Mubarak MS. Computer-aided design, synthesis, and biological evaluation of new indole-2-carboxamide derivatives as PI3Kα/EGFR inhibitors. Bioorg Med Chem Lett 2016; 26:2685-90. [PMID: 27084677 DOI: 10.1016/j.bmcl.2016.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 04/03/2016] [Accepted: 04/05/2016] [Indexed: 10/22/2022]
Abstract
Structure-based drug design and molecular modeling were employed to identify a new series of indole-2-carboxamides as potential anticancer agents. These compounds were synthesized and characterized with the aid of several spectroscopic techniques, such as FT-IR, NMR, and mass spectrometry as well as by elemental analysis. Molecular docking studies confirmed that the newly synthesized compounds accommodate PI3Kα and EGFR kinase catalytic sites and form H-bonding with the key binding residues. The antitumor activity of these new compounds against an array of cancer cell lines (human colon carcinoma (HCT116), leukemia (K562), and breast cancer (MDA231) was evaluated. Results revealed that these compounds were selective against the kinase domain, and none of them showed any inhibitory activity against K562. In addition, results showed that compound 13 exhibited high potency in HCT116 and MDA231 with IC50 values of 19 and 15μM, respectively. Our findings recommend that further optimization of this series would be beneficial for colon and breast cancer treatment.
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Affiliation(s)
- Kamal Sweidan
- Department of Chemistry, The University of Jordan, Amman 11942, Jordan.
| | - Dima A Sabbah
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, PO Box 130, Amman 11733, Jordan.
| | - Sanaa Bardaweel
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, The University of Jordan, Amman 11942, Jordan
| | - Khadeja Abu Dush
- Department of Chemistry, The University of Jordan, Amman 11942, Jordan
| | - Ghassan Abu Sheikha
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, PO Box 130, Amman 11733, Jordan
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56
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Chhajed SS, Sonawane SS, Upasani CD, Kshirsagar SJ, Gupta PP. Design, synthesis and molecular modeling studies of few chalcone analogues of benzimidazole for epidermal growth factor receptor inhibitor in search of useful anticancer agent. Comput Biol Chem 2016; 61:138-44. [DOI: 10.1016/j.compbiolchem.2016.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 02/01/2016] [Indexed: 11/26/2022]
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57
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Siegele BJ, Shilo K, Chao BH, Carbone DP, Zhao W, Ioffe O, Franklin WA, Edelman MJ, Aisner DL. Epidermal growth factor receptor (EGFR) mutations in small cell lung cancers: Two cases and a review of the literature. Lung Cancer 2016; 95:65-72. [PMID: 27040854 DOI: 10.1016/j.lungcan.2016.02.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 02/11/2016] [Accepted: 02/24/2016] [Indexed: 11/19/2022]
Abstract
Activating mutations in the epidermal growth factor receptor (EGFR) gene are exceedingly rare in small cell lung cancer (SCLC). We present two cases of SCLC harboring EGFR mutations, one in an 82 year-old male smoker with a combined SCLC and adenocarcinoma with a novel D855H point mutation in exon 21, and the second in a 68 year-old female never smoker with the L858R point mutation in exon 21. The cases, accompanied by a review of the literature, highlight the importance of integration of clinicopathologic considerations and adherence to recently promulgated Guideline recommendations for molecular testing in lung cancer.
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Affiliation(s)
| | | | - Bo H Chao
- The Ohio State University, United States
| | | | | | - Olga Ioffe
- University of Maryland Greenebaum Cancer Center, United States
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58
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Das A, Bhattacharya S. Different Types of Molecular Docking Based on Variations of Interacting Molecules. METHODS AND ALGORITHMS FOR MOLECULAR DOCKING-BASED DRUG DESIGN AND DISCOVERY 2016. [DOI: 10.4018/978-1-5225-0115-2.ch006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Molecular docking plays an important role in drug discovery research by facilitating target identification, target validation, virtual screening for lead identification and lead optimization. Depending upon the nature of the disease of interest, targets can be either protein or DNA while drugs are mostly organic small molecules. Different types of molecular docking techniques like protein-protein or protein-DNA or protein-small molecule or DNA-small molecule are employed for achieving the above mentioned objectives. This chapter provides a clear idea of the position of molecular docking in drug discovery with detailed discussion on different types of molecular docking based on the varieties of interacting partners. Subsequently the authors provide a detailed list of tools that can be used for docking in drug discovery and discus some examples of molecular docking in drug discovery before concluding with a remark on future areas of improvement in molecular docking related to drug discovery.
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59
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Ugale VG, Bari SB. Identification of potential Gly/NMDA receptor antagonists by cheminformatics approach: a combination of pharmacophore modelling, virtual screening and molecular docking studies. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2016; 27:125-145. [PMID: 26911562 DOI: 10.1080/1062936x.2015.1136679] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Gly/NMDA receptor has become known as potential target for the management of neurodegenerative diseases. Discovery of Gly/NMDA antagonists has thus attracted much attention in recent years. In the present research, a cheminformatics approach has been used to determine structural requirements for Gly/NMDA antagonism and to identify potential antagonists. Here, 37 quinoxaline derivatives were selected to develop a significant pharmacophore model with good certainty. The selected model was validated by leave-one-out cross-validation, an external test set, decoy set and Y-randomization test. Applicability domain was verified by the standardization approach. The validated 3D-QSAR model was used to screen virtual hits from the ZINC database by pharmacophore mapping. Molecular docking was used for assessment of receptor-ligand binding modes and binding affinities. The GlideScore and molecular interactions with critical amino acids were considered as crucial features to identify final hits. Furthermore, hits were analysed for in silico pharmacokinetic parameters and Lipinski's rule of five, demonstrating their potential as drug-like candidates. The PubChem and SciFinder search tools were used to authenticate the novelty of leads retrieved. Finally, five different leads have been suggested as putative novel candidates for the exploration of potent Gly/NMDA receptor antagonists.
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Affiliation(s)
- V G Ugale
- a Department of Pharmaceutical Chemistry , R. C. Patel Institute of Pharmaceutical Education and Research , Shirpur ( Dhule ), Maharashtra , India
| | - S B Bari
- b Department of Pharmaceutical Chemistry , H. R. Patel Institute of Pharmaceutical Education and Research , Shirpur ( Dhule ), Maharashtra , India
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60
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Luo HJ, Wang JZ, Huang NY, Deng WQ, Zou K. Computational insights into the interaction mechanism of triazolyl substituted tetrahydrobenzofuran derivatives with H(+),K(+)-ATPase at different pH. J Comput Aided Mol Des 2015; 30:27-37. [PMID: 26667240 DOI: 10.1007/s10822-015-9886-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/07/2015] [Indexed: 11/29/2022]
Abstract
The interaction mechanism of triazolyl substituted tetrahydrobenzofuran derivatives (compound 1 (N, N-Dipropyl-1-(2-phenyl-4,5,6,7-tetrahydrobenzofuran-4-yl)-1H-1,2,3-triazole-4-methanamine) and 2 (1-(2-Phenyl-4,5,6,7-tetrahydrobenzofuran-4-yl)-4-(morpholin-4-ylmethyl)-1H-1,2,3-triazole)) with H(+),K(+)-ATPase at different pH were studied by induced-fit docking, QM/MM optimization and MM/GBSA binding free energy calculations of two forms (neutral and protonated form) of compounds. The inhibition activity of compound 1 is measured and almost unchanged at different pH, while the activity of compound 2 increases significantly with pH value decreased. This phenomenon could be explained by their protonated form percentages and the calculated binding free energies of protonated and neutral mixture of compounds at different pH. The binding free energy of protonated form is higher than that of neutral form of compound, and the protonated form could be a powerful inhibitor of H(+),K(+)-ATPase. By the decomposed energy comparisons of residues in binding sites, Asp137 should be the key binding site to protonated form of compound because of the hydrogen bond and electrostatic interactions. These calculation results could help for further rational design of novel H(+),K(+)-ATPase inhibitors.
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Affiliation(s)
- Hua-Jun Luo
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, China.
| | - Jun-Zhi Wang
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, China
| | - Nian-Yu Huang
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, China
| | - Wei-Qiao Deng
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, China.,State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, China
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61
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Inhibition of 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase from Mycobacterium tuberculosis: in silico screening and in vitro validation. Eur J Med Chem 2015; 105:182-93. [PMID: 26491981 DOI: 10.1016/j.ejmech.2015.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 09/29/2015] [Accepted: 10/06/2015] [Indexed: 11/20/2022]
Abstract
Tuberculosis, caused by Mycobacterium tuberculosis, remains a serious global health threat, highlighting the urgent need for novel antituberculosis drugs. The shikimate pathway, responsible for aromatic amino acid biosynthesis, is required for the growth of Mycobacterium tuberculosis and is a potential drug target. 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase (mtDAH7Ps) catalyzes the first step in shikimate pathway. E-pharmacophore models for inhibitors of mtDAH7Ps - tyrosine, phenylalanine, phosphoenolpyruvate and (2S)-2,7-bis(phosphonooxy)heptanoic acid were screened against ZINC synthetic and natural compounds databases. The shortlisted compounds were subjected to induce fit docking and validated by Prime/Molecular Mechanics Generalized Born Surface Area calculation to predict ligand binding energy and ligand strain energy for ligand and receptor. The lead compounds were screened for their inhibitory activity against purified mtDAH7Ps enzyme. Lead compounds inhibited mtDAH7Ps in a concentration-dependent manner; with an IC50 value of 21 μM, 42 μM and 54 μM for α-Tocopherol, rutin and 3-Pyridine carboxyaldehyde respectively. Molecular Dynamics analysis for 50 ns of the active compounds-mtDAH7Ps complexes showed that the backbone of mtDAH7Ps was stable. These results suggest that α-tocopherol, 3 - Pyridine carboxyaldehyde and rutin could be novel drug leads to inhibit mtDAH7Ps in M. tuberculosis.
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62
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Nikalje AP, Ansari A, Bari S, Ugale V. Synthesis, Biological Activity, and Docking Study of Novel Isatin Coupled Thiazolidin-4-one Derivatives as Anticonvulsants. Arch Pharm (Weinheim) 2015; 348:433-45. [PMID: 25903766 DOI: 10.1002/ardp.201500020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 02/28/2015] [Accepted: 03/06/2015] [Indexed: 11/10/2022]
Abstract
A series of 2-(substituted-phenyl)-3-(2-oxoindolin-3-ylidene)amino)-thiazolidin-4-one derivatives were designed and synthesized under microwave irradiation, using an eco-friendly, efficient, microwave-assisted synthetic protocol that involves cyclocondensation of 3-substituted benzylidine-hydrazono-indolin-2-one 3a-j with thioglycolic acid in dimethyl formamide (DMF) as solvent and anhydrous zinc chloride as a catalyst, keeping in view the structural requirement of the pharmacophore. The intermediate compounds 3a-j were obtained by condensation of the hydrazone of indoline-2,3-dione with aromatic aldehydes. The synthesized derivatives were evaluated for CNS depressant activity and anticonvulsant activity in mice using the maximal electroshock seizure (MES) and subcutaneous pentylenetetrazole (sc-PTZ) induced seizure tests. All the derivatives showed good CNS depressant activity and showed protection in the MES test, indicative of their ability to inhibit the seizure spread. A histopathological study was performed to evaluate liver toxicity caused by the synthesized compounds. The compounds were nontoxic. A computational study was performed, in which log P values were calculated experimentally. Virtual screening was performed by molecular docking of the designed compounds into the ATP binding sites of the NMDA and AMPA receptors, to predict if these compounds have analogous binding modes.
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Affiliation(s)
- Anna P Nikalje
- Department of Pharmaceutical Chemistry, Y. B. Chavan College of Pharmacy, Aurangabad, Maharashtra, India
| | - Altamash Ansari
- Department of Pharmaceutical Chemistry, Y. B. Chavan College of Pharmacy, Aurangabad, Maharashtra, India
| | - Sanjay Bari
- Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmacy, Shirpur (Dhule), Maharashtra, India
| | - Vinod Ugale
- Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmacy, Shirpur (Dhule), Maharashtra, India
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63
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Patel HM, Bari P, Karpoormath R, Noolvi M, Thapliyal N, Surana S, Jain P. Design and synthesis of VEGFR-2 tyrosine kinase inhibitors as potential anticancer agents by virtual based screening. RSC Adv 2015. [DOI: 10.1039/c5ra05277g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Design and synthesis of VEGFR-2 tyrosine kinase inhibitors as potential anticancer agents has been done by a virtual based screening approach.
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Affiliation(s)
- Harun M. Patel
- Dept. of Pharmaceutical Chemistry
- University of KwaZulu-Natal (Westville Campus)
- Durban-4000
- South Africa
- Department of Pharmaceutical Chemistry
| | - Pankaj Bari
- Department of Pharmaceutical Chemistry
- R.C. Patel College of Pharmacy
- Dhule 425405
- India
| | - Rajshekhar Karpoormath
- Dept. of Pharmaceutical Chemistry
- University of KwaZulu-Natal (Westville Campus)
- Durban-4000
- South Africa
| | - Malleshappa Noolvi
- Department of Pharmaceutical Chemistry
- Shree Dhanvantary Pharmacy College
- Surat-3941110
- India
| | - Neeta Thapliyal
- Dept. of Pharmaceutical Chemistry
- University of KwaZulu-Natal (Westville Campus)
- Durban-4000
- South Africa
| | - Sanjay Surana
- Department of Pharmaceutical Chemistry
- R.C. Patel College of Pharmacy
- Dhule 425405
- India
| | - Pritam Jain
- Department of Pharmaceutical Chemistry
- R.C. Patel College of Pharmacy
- Dhule 425405
- India
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64
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Sivakamavalli J, Selvaraj C, Singh SK, Vaseeharan B. Interaction investigations of crustacean β-GBP recognition toward pathogenic microbial cell membrane and stimulate upon prophenoloxidase activation. J Mol Recognit 2014; 27:173-83. [PMID: 24591174 DOI: 10.1002/jmr.2348] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/28/2013] [Accepted: 12/02/2013] [Indexed: 01/03/2023]
Abstract
In invertebrates, crustaceans' immune system consists of pattern recognition receptors (PRRs) instead of immunoglobulin's, which involves in the microbial recognition and initiates the protein-ligand interaction between hosts and pathogens. In the present study, PRRs namely β-1,3 glucan binding protein (β-GBP) from mangrove crab Episesarma tetragonum and its interactions with the pathogens such as bacterial and fungal outer membrane proteins (OMP) were investigated through microbial aggregation and computational interaction studies. Molecular recognition and microbial aggregation results of Episesarma tetragonum β-GBP showed the specific binding affinity toward the fungal β-1,3 glucan molecule when compared to other bacterial ligands. Because of this microbial recognition, prophenoloxidase activity was enhanced and triggers the innate immunity inside the host animal. Our findings disclose the role of β-GBP in molecular recognition, host-pathogen interaction through microbial aggregation, and docking analysis. In vitro results were concurred with the in silico docking, and molecular dynamics simulation analysis. This study would be helpful to understand the molecular mechanism of β-GBP and update the current knowledge on the PRRs of crustaceans.
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Affiliation(s)
- Jeyachandran Sivakamavalli
- Crustacean Molecular Biology and Genomics Lab, Department of Animal Health and Management, Alagappa University, Karaikudi, 630 004, Tamil Nadu, India
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65
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Patel HM, Noolvi MN, Goyal A, Thippeswamy B. 2,5,6-Trisubstituted imidazo[2,1-b][1,3,4]thiadiazoles: Search for antihyperlipidemic agents. Eur J Med Chem 2013; 65:119-33. [DOI: 10.1016/j.ejmech.2013.04.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 04/04/2013] [Accepted: 04/08/2013] [Indexed: 11/29/2022]
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66
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Ingle R, Marathe R, Magar D, Patel HM, Surana SJ. Sulphonamido-quinoxalines: Search for anticancer agent. Eur J Med Chem 2013; 65:168-86. [DOI: 10.1016/j.ejmech.2013.04.028] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 04/12/2013] [Accepted: 04/15/2013] [Indexed: 10/26/2022]
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67
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Ahmed M, Sadek MM, Serrya RA, Kafafy AHN, Abouzid KA, Wang F. Assessment of new anti-HER2 ligands using combined docking, QM/MM scoring and MD simulation. J Mol Graph Model 2013; 40:91-8. [DOI: 10.1016/j.jmgm.2012.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 12/04/2012] [Accepted: 12/06/2012] [Indexed: 01/23/2023]
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68
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Induced-fit docking and binding free energy calculation on furostanol saponins from Tupistra chinensis as epidermal growth factor receptor inhibitors. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0509-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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69
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Serine phosphorylation by SYK is critical for nuclear localization and transcription factor function of Ikaros. Proc Natl Acad Sci U S A 2012; 109:18072-7. [PMID: 23071339 DOI: 10.1073/pnas.1209828109] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ikaros is a zinc finger-containing DNA-binding protein that plays a pivotal role in immune homeostasis through transcriptional regulation of the earliest stages of lymphocyte ontogeny and differentiation. Functional deficiency of Ikaros has been implicated in the pathogenesis of acute lymphoblastic leukemia, the most common form of childhood cancer. Therefore, a stringent regulation of Ikaros activity is considered of paramount importance, but the operative molecular mechanisms responsible for its regulation remain largely unknown. Here we provide multifaceted genetic and biochemical evidence for a previously unknown function of spleen tyrosine kinase (SYK) as a partner and posttranslational regulator of Ikaros. We demonstrate that SYK phoshorylates Ikaros at unique C-terminal serine phosphorylation sites S358 and S361, thereby augmenting its nuclear localization and sequence-specific DNA binding activity. Mechanistically, we establish that SYK-induced Ikaros activation is essential for its nuclear localization and optimal transcription factor function.
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70
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N-Phenyl-4-hydroxy-2-quinolone-3-carboxamides as selective inhibitors of mutant H1047R phosphoinositide-3-kinase (PI3Kα). Bioorg Med Chem 2012; 20:7175-83. [PMID: 23121722 DOI: 10.1016/j.bmc.2012.09.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 09/18/2012] [Accepted: 09/25/2012] [Indexed: 12/14/2022]
Abstract
This work describes our efforts to optimize the lead PI3Kα inhibitor N-benzyl 4-hydroxy-2-quinolone-3-carboxamide using structure-based design and molecular docking. We identified a series of N-phenyl 4-hydroxy-2-quinolone-3-carboxamides as selective inhibitors of mutant H1047R versus wild-type PI3Kα and we also showed that the cell growth inhibition by these compounds likely occurs by inhibiting the formation of pAKT and induction of apoptosis.
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71
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Noolvi MN, Patel HM, Kaur M. Benzothiazoles: search for anticancer agents. Eur J Med Chem 2012; 54:447-62. [PMID: 22703845 DOI: 10.1016/j.ejmech.2012.05.028] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 05/16/2012] [Accepted: 05/22/2012] [Indexed: 11/25/2022]
Abstract
Novel derivatives of 2-amino benzothiazoles 4(a-j) have been synthesized and tested for their antitumor activity using National Cancer Institute (NCI) disease oriented antitumor screen protocol against nine panel of cancer cell lines. Among the synthesized compounds, two compounds were granted NSC code and screened at National Cancer Institute (NCI)-USA for anticancer activity at a single high dose (10(-5) M) and five dose in full NCI 60 cell panel. Among the selected compounds, 7-chloro-N-(2,6-dichlorophenyl)benzo[d]thiazol-2-amine (4i) with GI(50) values of 7.18 × 10(-8) M against Non-Small Cell HOP-92 Lung Cancer cell line proved to be the most active members in this study. Virtual screening was carried out through docking the designed compounds into the ATP binding site of epidermal growth factor receptor (EGFR) to predict if these compounds have analogous binding mode to the EGFR inhibitors.
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Affiliation(s)
- Malleshappa N Noolvi
- Department of Pharmaceutical Chemistry, Shree Dhanvantary Pharmacy College, Kim (Surat)-3941110, Gujrat, India.
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72
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Insights from comprehensive multiple receptor docking to HDAC8. J Mol Model 2012; 18:3927-39. [PMID: 22431224 DOI: 10.1007/s00894-011-1297-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Accepted: 11/02/2011] [Indexed: 12/29/2022]
Abstract
A systematic investigation of the available crystal structures of HDAC8 and of the influence of different receptor structures and docking protocols is presented. The study shows that the open conformation of HDAC8 may be preferred by ligands with flexible surface binding groups, as such a conformation allows the ligands to minimize their exposure to solvent upon binding. This observation allowed us to rationalize the excellent potency of pyrazole-based inhibitors compared to that of isoxazole-based inhibitors.
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73
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Drakou CE, Malekkou A, Hayes JM, Lederer CW, Leonidas DD, Oikonomakos NG, Lamond AI, Santama N, Zographos SE. hCINAP is an atypical mammalian nuclear adenylate kinase with an ATPase motif: structural and functional studies. Proteins 2011; 80:206-20. [PMID: 22038794 DOI: 10.1002/prot.23186] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 08/01/2011] [Accepted: 08/27/2011] [Indexed: 11/11/2022]
Abstract
Human coilin interacting nuclear ATPase protein (hCINAP) directly interacts with coilin, a marker protein of Cajal Bodies (CBs), nuclear organelles involved in the maturation of small nuclear ribonucleoproteins UsnRNPs and snoRNPs. hCINAP has previously been designated as an adenylate kinase (AK6), but is very atypical as it exhibits unusually broad substrate specificity, structural features characteristic of ATPase/GTPase proteins (Walker motifs A and B) and also intrinsic ATPase activity. Despite its intriguing structure, unique properties and cellular localization, the enzymatic mechanism and biological function of hCINAP have remained poorly characterized. Here, we offer the first high-resolution structure of hCINAP in complex with the substrate ADP (and dADP), the structure of hCINAP with a sulfate ion bound at the AMP binding site, and the structure of the ternary complex hCINAP-Mg(2+) ADP-Pi. Induced fit docking calculations are used to predict the structure of the hCINAP-Mg(2+) ATP-AMP ternary complex. Structural analysis suggested a functional role for His79 in the Walker B motif. Kinetic analysis of mutant hCINAP-H79G indicates that His79 affects both AK and ATPase catalytic efficiency and induces homodimer formation. Finally, we show that in vivo expression of hCINAP-H79G in human cells is toxic and drastically deregulates the number and appearance of CBs in the cell nucleus. Our findings suggest that hCINAP may not simply regulate nucleotide homeostasis, but may have broader functionality, including control of CB assembly and disassembly in the nucleus of human cells.
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Affiliation(s)
- Christina E Drakou
- Institute of Organic and Pharmaceutical Chemistry, National Hellenic Research Foundation, Athens 11635, Greece
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Podlipnik Č, Tutino F, Bernardi A, Seneci P. DFG-in and DFG-out homology models of TrkB kinase receptor: Induced-fit and ensemble docking. J Mol Graph Model 2010; 29:309-20. [DOI: 10.1016/j.jmgm.2010.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 09/14/2010] [Accepted: 09/16/2010] [Indexed: 10/19/2022]
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Yuriev E, Agostino M, Ramsland PA. Challenges and advances in computational docking: 2009 in review. J Mol Recognit 2010; 24:149-64. [DOI: 10.1002/jmr.1077] [Citation(s) in RCA: 223] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 07/20/2010] [Accepted: 07/21/2010] [Indexed: 12/12/2022]
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Pyrkov TV, Ozerov IV, Blitskaia ED, Efremov RG. [Molecular docking: role of intermolecular contacts in formation of complexes of proteins with nucleotides and peptides]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010; 36:482-92. [PMID: 20823916 DOI: 10.1134/s1068162010040023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Knowledge of 3D-structure of protein-ligand complex is a major prerequisite for understanding the functioning mechanism of cellular proteins and membrane receptors. This is also of a great help in rational drug design projects. In the present paper we briefly review the molecular docking approaches used to predict possible orientation of a ligand in the protein binding site. The recent trends to improve the accuracy and efficiency of docking algorithms are demonstrated with the results obtained in Laboratory of Biomolecular Modeling. Particular attention is paid to protein-ligand hydrophobic and stacking interactions responsible for molecular recognition of ligand fragments. Such type of interactions are not always adequately represented in scoring criteria of docking applications that leads to mismatch in 3D-structure complexes predictions. That is why further inquiry of methods to account for these interactions is now the area of active research.
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