BBS Faculty Member - Jon Clardy

Jon Clardy

Department of Biological Chemistry and Molecular Pharmacology

Harvard Medical School
Building C, 6th floor, C-643
240 Longwood Avenue
Boston, MA 02115
Tel: 617-432-2845
Fax: 617-432-6424
Lab Members: 10 postdoctoral fellows, 1 graduate student
Visit my lab page here.

The laboratory focuses on understanding how small molecules, particularly those from bacteria and fungi, control biological processes. Organizing themes include: 1) function-based discovery of microbially-produced small molecules and their roles in microbial symbioses, 2) function-based discovery of biologically active small molecules using high-throughput screening, 3) genome-based discovery of bacterially-produced small molecules and their evolutionary histories. The laboratory is also involved in infectious disease research and current projects include developing a high-throughput screen for small molecules that influence the liver stage of malaria.

1. In the past few years, we have focused on multilateral symbioses involving bacteria, partly because they are widespread and interesting and partly because they lead to the discovery of new useful molecules in the biological context in which they evolved. Current projects involve the bacterial symbionts of fungus-farming ants, insect-killing nematodes, bark beetles, social amoeba, and microalgae.

2. We also continue to discover small molecules in a more medically relevant context: high-throughput screening for a variety of diseases. In these projects we have focused on global infectious disease and microbially produced small molecules from tropical environments. This interest has led to the development of several high-throughput screens for antimalarial small molecules.

3. In the past few years, it has become quite clear that well studied bacteria – the producers of drugs that are used on the ton scale, for example – are genetically capable of producing many more potentially useful small molecules. The biosynthetic gene can be seen but the associated molecules have never been characterized. Ways to access these cryptic metabolites is a current focus of the laboratory.

Last Update: 8/21/2013


For a complete listing of publications click here.



The Jekyll-and-Hyde chemistry of Phaeobacter gallaeciensis. Seyedsayamdost MR, Case RJ, Kolter R, Clardy J. Nature Chemistry. 2011, 3, 331-5.

Bacterial symbionts and natural products. Crawford JM, Clardy J.
Chem. Comm. 2011, 47, 331-5.

Regulating alternative lifestyles in entomopathogenic bacteria. Crawford, J.M., Kontnik, R., & Clardy,
J. Curr. Biol. 2010, 20, 69-74.

© 2013 by the President and Fellows of Harvard College