Journal of Pharmacy And Bioallied Sciences
Journal of Pharmacy And Bioallied Sciences Login  | Users Online: 3774  Print this pageEmail this pageSmall font sizeDefault font sizeIncrease font size 
    Home | About us | Editorial board | Search | Ahead of print | Current Issue | Past Issues | Instructions | Online submission




 
 Table of Contents  
COMMENTARY
Year : 2014  |  Volume : 6  |  Issue : 3  |  Page : 137-138  

Predicting perfect drug candidates: Molecular docking 2.0


Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Egypt

Date of Web Publication24-Jun-2014

Correspondence Address:
Mohamed Ismail Nounou
Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University
Egypt
Login to access the Email id

Source of Support: None, Conflict of Interest: None


PMID: 25035632

Rights and PermissionsRights and Permissions

How to cite this article:
Nounou MI. Predicting perfect drug candidates: Molecular docking 2.0. J Pharm Bioall Sci 2014;6:137-8

How to cite this URL:
Nounou MI. Predicting perfect drug candidates: Molecular docking 2.0. J Pharm Bioall Sci [serial online] 2014 [cited 2020 Aug 5];6:137-8. Available from: http://www.jpbsonline.org/text.asp?2014/6/3/137/135242

Development of a new active pharmaceutical entity and its transformation from bench to bedside is a lengthy and costly process. On an average, it takes over 15 years and $600 million to develop one drug out of at least 10,000 candidates in its pathway from the laboratory to market. [1] Drug discovery process is usually initiated with identifying, isolating and validating the disease target followed by lead compounds screening, identification and optimization.

The progression and elaboration of the state-of-art computer aided drug design and development helped in overshadowing the traditional synthetic pathways in drug discovery. Advanced in-silico approaches and pharmainformatics have provided a tremendous push to pharmaceutical companies and medicinal chemists towards rapid and efficient identification of new potential drug targets and candidates. [2]

Traditionally, disease targets, such as isolated receptor proteins, were identified via complicated and lengthy processes such as nuclear magnetic resonance and X-ray crystallography. The advances in homology modeling have provided a quick and easy, in spite of being less accurate, tool to identify targets via constructing an atomic resolution model of the target protein from its amino acid sequence and/or its related homology proteins. [3] On the other hand, lead discovery and identification can be performed by in-silico techniques such as molecular docking, virtual high throughput screening, quantitative structure activity relationship, pharmacophore mapping and fragment based screening. These techniques involve possible drug candidate database filtering, similarity analysis and alignment.

Molecular docking is an effective and fast computational technique to estimate the binding affinity of a ligand (drug candidate) in the macromolecular target site (receptor). It is usually based on the receptor, if the chemical and 3D structure of the target is well-known, or ligand, if the target structure is unknown. In the case of ligand based molecular docking, a known inhibitor or activator of the target site is used to deduct the possible structural information of the target site. Molecular docking algorithms, used in such design process, depend on molecular structure flexibility and search criteria to estimate the optimal binding positions. A scoring system is used to detect the ideal docking configuration. Scoring systems usually uses entropy maximization strategies, which generally depend on electrostatic attraction forces, Van der Waal's forces and hydrophobic interactions. [4]

The establishment and development of well-defined and large chemical compounds' databases facilitated efficient and rapid molecular docking. PubChem databases (http://pubchem.ncbi.nlm.nih.gov) are some of the most widely used databases in molecular docking. They were first released and available online on 2004 by the United States National Institutes of Health. [5],[6] PubChem databases include PubChem Substance, PubChem Compound and PubChem Bioassay. These databases provide easily accessible and free information on the 2D and 3D chemical structures and biological activities of over 130 million bioactive small chemical compounds. [7]

Furthermore, the current availability of numerous academically free and/or open-source virtual screening and/or docking software such as Molegro Virtual Docker® , Dock® , AutoDock® , FLO TM , Flex X® and molecular operating environment (MOE), molecular homology software such as Modeller® and molecular visualization and properties prediction software such as PyMOL® PrpSA® , PreADMet® and Mavrin Sketch® facilitated the wild spread of molecular docking research in the past 5 years. Such free software tools and free available databases encouraged and enabled researchers from all over the world to advance in the molecular docking and computer-aided drug design in a dry laboratory settings developing high quality publications with minimal costs. In addition, the decreased total cost of powerful power horse computers-aided such kind of research.

In the current research article, the authors adopted the computer aided design approach to develop therapeutics targeting the unique and essential enzyme; porphobilinogen synthase (PBGS) to control and manage the staphylococcal infections. As the structure of Staphylococcus aureus PBGS is not known, the authors adopted virtual homology modeling to construct a possible 3D model using Modeller® 9 v8 tool (University of California San Francisco, San Francisco, CA 94158-2330, USA). The X-ray crystallographic structure of PBGS from Chlorobium vibrioform was used as a template. Molecular docking was carried out using MOE docking software. As 4,5-dioxovalerate (DV) is known to inhibit PBGS, a library of dioxovalerate derivatives (DVDs) was used. DVD13 was found to be the most effective PBGS activator among all DVDs based on its docking score. The whole experimental study for this drug design process in this article was performed in a total dry laboratory setting.

In spite of the previously mentioned advantages of dry laboratory research in molecular docking, pre-clinical in-vitro and in-vivo studies are still required to determine if such discovered lead compounds are worth the time and money to proceed and initiate further clinical development and evaluation. Future wise, dry laboratory drug discovery should be accompanied with lead compounds chemical optimization and appendixed with sufficient wet laboratory in-vitro and in-vivo proof of the efficacy and safety of the proposed drug candidates.

 
   References Top

1.Pugazhendhi D. In-silico methods in drug discovery-A review. Int J Adv Res Comput Sci Softw Eng 2013;3:680.  Back to cited text no. 1
    
2.Huang SM, Abernethy DR, Wang Y, Zhao P, Zineh I. The utility of modeling and simulation in drug development and regulatory review. J Pharm Sci 2013;102:2912-23.  Back to cited text no. 2
    
3.Meng XY, Zhang HX, Mezei M, Cui M. Molecular docking: A powerful approach for structure-based drug discovery. Curr Comput Aided Drug Des 2011;7:146-57.  Back to cited text no. 3
    
4.Yuriev E, Agostino M, Ramsland PA. Challenges and advances in computational docking: 2009 in review. J Mol Recognit 2011;24:149-64.  Back to cited text no. 4
    
5.Li Q, Cheng T, Wang Y, Bryant SH. PubChem as a public resource for drug discovery. Drug Discov Today 2010;15:1052-7.  Back to cited text no. 5
    
6.van Deursen R, Blum LC, Reymond JL. A searchable map of PubChem. J Chem Inf Model 2010;50:1924-34.  Back to cited text no. 6
    
7.Kitchen DB, Decornez H, Furr JR, Bajorath J. Docking and scoring in virtual screening for drug discovery: Methods and applications. Nat Rev Drug Discov 2004;3:935-49.  Back to cited text no. 7
    




 

Top
 
 
  Search
 
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

 
  In this article
    References

 Article Access Statistics
    Viewed1866    
    Printed40    
    Emailed0    
    PDF Downloaded96    
    Comments [Add]    

Recommend this journal