Archive for the ‘Reviews’ Category

Review: Aminoacyl tRNA synthetases as targets for antibiotic development

In this review from MedChemComm’s forthcoming Natural Product themed issue, Vinayak Agarwal and Satish K. Nair (University of Illinois at Urbana-Champaign) review a number of small molecule natural products, that target aminoacyl tRNA synthetases, which are available for development into useful antibiotics. In particular Agarwal and Nair focus on three different chemical classes:

  1. Molecules derived from polyketide precursors
  2. Molecules that occur as phosphoramidate conjugates
  3. Promising synthetic molecules with distinct modes of action to molecules of class 1 and 2

The factors that undermine the broad-based use of some of these molecules as effective antibiotics in humans are also discussed, as well as strategies to aid in directing development of derivatives with improved pharmacological properties.

Aminoacyl tRNA synthetases as targets for antibiotic development
Vinayak Agarwal and Satish K. Nair
Med. Chem. Commun., 2012,
DOI: 10.1039/C2MD20032E

We will be bringing you more examples of work from this themed issue, guest edited by Professor Christopher T. Walsh andDr Sylvie Garneau-Tsodikova, over the next few weeks so make sure you check back for more.

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Review: Discrete acyltransferases involved in polyketide biosynthesis

In this review Ewa Maria Musiol and Tilmann Weber at Eberhard Karls University, Tübingen  present a summary of genetically and biochemically characterized in trans active ATs, which supply polyketide synthases assembly lines with building blocks and thus, might influence the polyketide structure by their substrate selectivity.

Included in this review are discussions on:

  • MmpC involved in mupirocin biosynthesis
  • OzmM and OzmC involved in oxazolomycin biosynthesis
  • RhiG involved in rhizoxin biosynthesis
  • VirI involved in virginiamycin biosynthesis
  • TaV involved in myxovirescin biosynthesis
  • BryP involved in bryostatin biosynthesis

…. and many more.

Discrete acyltransferases involved in polyketide biosynthesis
Ewa Maria Musiol and Tilmann Weber
Med. Chem. Commun., 2012,
DOI: 10.1039/C2MD20048A

This review is part of our forthcoming themed issue on Natural Products, guest edited by Professor Christopher T. Walsh and Dr Sylvie Garneau-Tsodikova – keep checking back for more hot research in this theme.

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Review: Biosynthetic medicinal chemistry for lead advancement

‘Natural products are an unsurpassed source of lead structures for drug discovery. However, these molecules, many of which fall into the beyond-rule-of-5 chemical space, are often difficult to optimize by chemical means because of their complex structures.’, explains Frank E. Koehn (Pfizer, Natural Products, Oncology Worldwide Medicinal Chemistry Groton, USA).

In this MedChemComm review article, Frank E. Koehn provides the reader with an overview on biosynthesis-oriented strategies to access analogues of natural products, which would be unattainable by chemical semisynthesis. Five relevant examples of distinct drugs, namely:

  • salinosporamide
  • geldanamycin
  • FK506
  • rapamycin
  • epothilone

are described, for which libraries of analogues have been prepared via biosynthetic engineering approaches and which are under intensive biological investigation or already in clinical use.

This review is part of our forthcoming themed issue on Natural Products, guest edited by Professor Christopher T. Walsh and Dr Sylvie Garneau-Tsodikova – keep checking back for more hot research in this theme:

Biosynthetic medicinal chemistry of natural product drugs
Frank E. Koehn
Med. Chem. Commun., 2012, Review Article

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Review: Gd(III) chelates for MRI contrast agents

Kai-Hsiang Chuang and Chang-Tong Yang from the Singapore Bioimaging Consortium, A*STAR provide a timely review on the major developments of Gd(III) chelates as MRI contrast agents, from high relaxivity to ‘‘smart’’, from blood pool to blood–brain barrier.


The review covers:

  • Relaxivity of Gd(III) based MRI contrast agents
  • Smart contrast agents (pH-, metal ion-, enzyme- ; small biomolecule-activated)
  • Blood pool contrast agents (non-covalent binding to plasma proteins, polymeric and dendrimeric contrast agents)
  • Blood–brain barrier permeable contrast agents

Should your interests lie in coordination chemistry, polymer and supramolecular chemistry, medicinal chemistry, spectroscopy, biology or radiology, this review is for you!

Gd(III) chelates for MRI contrast agents: from high relaxivity to “smart”, from blood pool to blood–brain barrier permeable
Chang-Tong Yang and Kai-Hsiang Chuang
Med. Chem. Commun., 2012, Advance Article
DOI: 10.1039/C2MD00279E, Review Article

Why not also view our 2011 collection of topical review articles, across the full range of the journal scope, here.

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Computational screening of protein kinases on the cover of MedChemComm issue 4

The cover of this month’s issue of MedChemComm features work from Bonnet et al. on discriminating Type II kinase inhibitors from a large number of Type I and other decoy ligands taken from the MOE kinase and DUD databases. Have a read, it’s FREE to access for 6 weeks.

Targeting the inactive conformation of protein kinases: computational screening based on ligand conformation
Pascal Bonnet, Daniel Mucs and Richard A. Bryce
DOI: 10.1039/C1MD00256B

This issue also contains three reviews which you may find interesting:

Understanding and overcoming aminoglycoside resistance caused by N-6′-acetyltransferase
Kenward Vong and Karine Auclair
DOI: 10.1039/C2MD00253A

β-Lactams and β-lactones as activity-based probes in chemical biology
Thomas Böttcher and Stephan A. Sieber
DOI: 10.1039/C2MD00275B

The MEP pathway and the development of inhibitors as potential anti-infective agents
Ian Hale, Paul M. O’Neill, Neil G. Berry, Audrey Odom and Raman Sharma
DOI: 10.1039/C2MD00298A

View all this and much more HERE!

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Review of the biosynthetic MEP pathway and potential anti-infective agents

Audrey Odom, Raman Sharma and colleagues present a review examining the enzymes in the biosynthetic non-mevalonate (MEP) pathway from a detailed medicinal chemistry and structural biology perspective. The MEP pathway is utilised by plants but is absent in mammalian systems, making it a very attractive target for the development of potential next generation antimicrobial chemotherapeutics as well as novel herbicides.

Want to find out more about this pathway and its potential agents? You’re just a click away….


The MEP pathway and the development of inhibitors as potential anti-infective agents
Ian Hale, Paul M. O’Neill, Neil G. Berry, Audrey Odom and Raman Sharma
Med. Chem. Commun., DOI: 10.1039/C2MD00298A

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Review article on small-molecule inhibitors of dimeric transcription factors: a challenging area

Disruption of protein–protein or protein–DNA interactions involved in transcriptional machinery using small molecules poses a real challenge owing to several factors, including: the large interfacial areas involved, the lack of obvious binding sites, and the large free energy of association between the interfaces.

However, in recent years there has been considerable success in the dimeric transcription factor disruption using small molecules. Steven Fletcher and co-workers at University of Maryland School of Pharmacy, provide a review of the progress made in this area since 2008.

This review covers:

  • Inhibitors of STAT3
  • Inhibitors of c-Myc
  • Inhibitors of AP-1
  • Inhibitors of HIF-1

Small-molecule inhibitors of dimeric transcription factors: Antagonism of protein–protein and protein–DNA interactions
Jeremy L. Yap, Jay Chauhan, Kwan-Young Jung, Lijia Chen, Edward V. Prochownik and Steven Fletcher
Med. Chem. Commun., 2012,
DOI: 10.1039/C2MD00289B, Review

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Review article on β-lactams and β-lactone probes for chemical biology

β-lactams and β-lactone probes for chemical biologyThomas Böttcher and Stephan A. Sieber here review the use of β-lactams and β-lactones for activity-based protein profiling.  ABPP uses small molecules to target the active site of specific enzymes and is useful for understanding protein targets of natural products, drugs or synthetic libraries.   β-Lactams and β-lactones are ideal probes for ABPP due to their so-called ‘privileged structures’, i.e. they have a core scaffold that can be recognised by a wide range of enzyme classes and can be ‘fine-tuned to obtain customized target selectivity’.

Take a look at this detailed review, which provides an update to of the field of activity-based β-lactam and β-lactone probes and their applications in chemical biology:

β-Lactams and β-lactones as activity-based probes in chemical biology
Thomas Böttcher and Stephan A. Sieber
Med. Chem. Commun., 2012, Advance Article
DOI: 10.1039/C2MD00275B

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Have you seen our recent review articles? Papers on molecular obesity, telomeres targetted with natural products and minisci reactions

During 2011 we published a number of topical reviews on a wide range of topics by expert researchers in their fields.  We’ve collected them below and we hope you’ll find something interesting in your area!

Molecular obesity, potency and other addictions in drug discovery
Michael M. Hann
DOI: 10.1039/C1MD00017A

Proteochemometric modeling as a tool to design selective compounds and for extrapolating to novel targets

Gerard J. P. van Westen, Jörg K. Wegner, Adriaan P. IJzerman, Herman W. T. van Vlijmen and A. Bender
DOI: 10.1039/C0MD00165A

Impact of ion class and time on oral drug molecular properties
Paul D. Leeson, Stephen A. St-Gallay and Mark C. Wenlock
DOI: 10.1039/C0MD00157K

Novel, unifying mechanism for aromatic primary-amines (therapeutics, carcinogens and toxins): electron transfer, reactive oxygen species, oxidative stress and metabolites
Peter Kovacic and Ratnasamy Somanathan
DOI: 10.1039/C0MD00233J

Natural products targeting telomere maintenance
Jack Li-Yang Chen, Jonathan Sperry, Nancy Y. Ip and Margaret A. Brimble
DOI: 10.1039/C0MD00241K

The p53-MDM2/MDMX axis – A chemotype perspective

Kareem Khoury, Grzegorz M. Popowicz, Tad A. Holak and Alexander Dömling
DOI: 10.1039/C0MD00248H

Computational ligand-based rational design: role of conformational sampling and force fields in model development
Jihyun Shim and Alexander D. MacKerell, Jr.
DOI: 10.1039/C1MD00044F

Expanding the horizon of chemotherapeutic targets: From MDM2 to MDMX (MDM4)
Antonio Macchiarulo, Nicola Giacchè, Andrea Carotti, Fabiola Moretti and Roberto Pellicciari
DOI: 10.1039/C0MD00238K

Progress on lamellarins
Daniel Pla, Fernando Albericio and Mercedes Álvarez
DOI: 10.1039/C1MD00003A

Are pyridazines privileged structures?
Camille G. Wermuth
DOI: 10.1039/C1MD00074H

Towards biocompatible nanovalves based on mesoporous silica nanoparticles

Ying-Wei Yang
DOI: 10.1039/C1MD00158B

Minisci reactions: Versatile CH-functionalizations for medicinal chemists

Matthew A. J. Duncton
DOI: 10.1039/C1MD00134E

If you have an idea for a review article that hasn’t been covered and you would like to see included, contact the Editorial Office – we’d love to hear from you.

You can also find the collection here.

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Themed issue on epigenetics just published

The web-based issue in MedChemComm termed “Epigenetics” is a timely collection of articles covering recent developments in epigenetic medicinal chemistry research in the broadest sense, including reviews of the field, original articles, and perspectives looking in to the future.

Epigenetics is the study of changes in phenotype or gene expression that cannot be related to a change in gene sequence. From being seen as a fringe science looking at strange phenomena, it is today very clear that epigenetic mechanisms are crucial for cell development and a cause of many diseases. In particular, many cancers have been shown to have an epigenetic component, and cancer research provided epigenetic compounds before the proteins involved were known, as exemplified by Breslow’s pioneering work on hydroxamic acids. Today several histone deacetylase (HDAC) inhibitors have reached the market, and this area is the most established part of the research field. Similarly, many other enzymes involved in epigenetic regulation are potential drug targets and development of new tool compounds to validate these targets and understanding the dynamics of epigenetic marks is a key requirement in the field. Fortunately, this need is balanced by increasing activity and interest from the medicinal chemistry community as we hope this issue clearly demonstrates.

It is therefore highly appropriate that MedChemComm has decided to gather a web-based issue on epigenetic medicinal chemistry research. This issue contains more than 10 papers on epigenetic research with contributions as concise articles as well as reviews from leading groups in the field. These papers demonstrate the broadness of the field including inhibitors of HDACs, DNA methyltransferases, protein-protein interactions of reader domains, and looking at the enzymatic action of lysyl hydroxylases.

We are very pleased with this issue describing and demonstrating state-of-art within epigenetic medicinal chemistry and hope the readers of MedChemComm will enjoy it.

-Rasmus Prætorius Clausen (University of Copenhagen) and Mark Bunnage (Pfizer), Guest Editors

View the issue

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