Resistance to Antibiotics

 What's New

Molecular evolution meeting

Laasya Samhita and Shraddha Karve are trying to bring together the (too) small community of researchers in India who work at the interface of molecular biology and evolution at Ashoka university in December this year. Watch this space.

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New clipboard article out in Journal of Biosciences!

Usually, the genetic code is decoded in sets of three nucleotides starting with the start codon. Occasionally, the decoding ribosomes slip and change the ‘reading frame’. For some viruses, changing reading frames is a way of life. Read on to find out more about a particular study that I have covered in this clipboard: https://www.ias.ac.in/describe/article/jbsc/047/0049

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Popular science article

  An old article of Laasya’s on the Handicap principle has been included in the special 75-year e-book of Resonance! Aimed at high school and college students.   https://www.ias.ac.in/Publications/e-Books/Resonance-75-vol1

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Welcome to MIRA Labs! While we understand how DNA based changes contribute to adaptation and evolution, the impact of non-genetic variation has remained controversial. We work with mistranslation, one of the biggest and most widespread contributors to non-genetic variation. In prior work, we found that specific protein changes may be unimportant, instead, stress responses triggered by mistranslated proteins could aid in adaptation. How does mistranslation contribute to survival under stress? Do all cells in population mistranslate to the same degree, what does this mean for adaptation? Can protein-only changes feed back into DNA changes and contribute to evolution? Most assessments of antibiotic resistance explore only genetic resistance. We found that basal resistance to the antibiotic ciprofloxacin requires some amount of mistranslation by the cell. How can we identify non-genetic drivers of resistance and quantify their contribution to the AMR problem? How do translation rate and accuracy impact resistance to antibiotics? Can we design drugs to target non-mutational tolerance? We use a combination of molecular biology and biochemistry techniques, experimental evolution, microscopy and collaborations as needed to address these questions!

Reach us

Address: Ashoka University,
Rajiv Gandhi Education city,
Sonipat-131029, Haryana
Email: laasya.samhita@ashoka.edu.in 
Homepage picture credit: GFP labelled
E. coli cells growing in a microfluidics device