DNA damage induced bacterial filaments recover via asymmetric chromosome segregation and cell division

DNA damage induced bacterial filaments recover via asymmetric chromosome segregation and cell division

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    We study how DNA repair pathways are regulated to maintain genomic integrity

     

    Our

    RESEARCH

    Repair pathway

    regulation

    Repair pathway

    choice

    Damage response

    cell cycle regulation

    DNA

    DAMAGE

    Efficient repair of DNA damage is essential for cellular survival. When cells face DNA damage from internal or external factors, multiple steps must be taken to ensure effective repair of damage as well as restoration of wild type growth.

     

    Our lab is broadly interested in studying the regulation of DNA damage response and repair pathways in vivo.

     

    At present, we are addressing the following questions in microbial systems:

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          a. Regulation of DNA damage response and repair clearance in bacteria

                  How do cells recover after DNA damage onslaught

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          b. Regulation of pathway choice during repair

                 Regulation and specificity of error-prone DNA polymerases

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          c. Molecular mechanism of double-strand break repair via homologous recombination

                 How do double-strand break ends find their homologous partner

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          d. Mitochondrial DNA repair mechanisms

                 How do cells regulate mitochondrial DNA damage response and repair

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    We use a combination of live-cell imaging, super-resolution microscopy, high-throughput sequencing techniques as well as genetic and molecular biology assays to mechanistically understand how cells from all domains of life maintain genome integrity.

     

    The LAB

    The LAB

     LAB Alumni 

     

    PUBLICATIONS

    • Joseph A and Badrinarayanan A*. (2020) Visualizing mutagenic repair: novel insights into bacterial translesion synthesis. FEMS Microbiology Reviews (in press). 10.1093/femsre/fuaa023 

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    • Raghunathan S, Chimthanawala C, Vecchiarelli A, Krishna S and Badrinarayanan A* (2020). Asymmetric chromosome segregation and cell division in DNA damage-induced bacterial filaments. bioRxiv 993485; doi: https://doi.org/10.1101/993485. (in review)

     

    • Sharda M, Badrinarayanan A*, Seshasayee A* (2020). Evolution and conservation of the non-homologous end joining repair pathway in bacteria. bioRxiv 869602; doi: https://doi.org/10.1101/869602. (in review) 

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    • Chimthanawala A., Badrinarayanan A*. (2019) "Live-Cell Fluorescence Imaging of RecN in Caulobacter crescentus Under DNA Damage". In: Badrinarayanan A. (eds) SMC Complexes. Methods in Molecular Biology, vol 2004.
       

    • Raghunathan S., Badrinarayanan A*. (2019) "Tracking Bacterial Chromosome Dynamics with Microfluidics-Based Live Cell Imaging". In: Badrinarayanan A. (eds) SMC Complexes. Methods in Molecular Biology, vol 2004.
       

    • Badrinarayanan A, Le T, Spille J, Cisse I and Laub M. "Global analysis of double-strand break processing reveals in vivo properties of the helicase-nuclease complex AddAB." PLoS genetics 13.5 2017. e1006783.

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    • Badrinarayanan A and Leake M. Using Fluorescence Recovery After Photobleaching (FRAP) to study dynamics of the Structural Maintenance of Chromosome (SMC) complex in vivo. Methods in Molecular Biology, 2016. 1431:37-46.

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    • Nolivos S, Upton A, Badrinarayanan A, Muller J, Zawadzka K, Wiktor J, GillA, Arciszewska L, Nicolas E, Sherratt D. MatP regulates the coordinated action of topoisomerase IV and MukBEF in chromosome segregation. Nature communications, 2016. 7:10466.

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    • Badrinarayanan A, Le T, Laub M. Bacterial chromosome organization and segregation. Annual Review of Cell and Developmental Biology, 2015. 31: 171-99.

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    • Badrinarayanan A, Le T, Laub M. Rapid pairing and subsequent resegregation of distant homologous loci enables DNA double-strand break repair in bacteria. The Journal of Cell Biology, 2015. 210:385-400.

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    • Nicolas E, Uphoff S, Upton A, Henry O, Badrinarayanan A, Sherratt D. The SMC complex MukBEF recruits Topoisomerase IV to the origin of replication region in live Escherichia coli. MBio, 2014, 5(1), e1001-13.

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    • Badrinarayanan A, Reyes-Lamothe R, Uphoff S, Leake M, Sherratt D. In vivo architecture and action of bacterial structural maintenance of chromosome proteins. Science, 2012, 338(6106), 528-531.

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    • Badrinarayanan A, Lesterlin C, Reyes-Lamothe R, Sherratt D. The Escherichia coli SMC complex, MukBEF, shapes nucleoid organization independently of DNA replication. Journal of Bacteriology, 2012, 94(17), 4669-76.

     

    OPPORTUNITIES

    We are always looking for motivated people to join our lab! The questions we ask are inter-disciplinary in nature and we are happy to have researchers from diverse backgrounds of science working together. Do get in touch if you are interested in questions pertaining to the maintenance of genome integrity in cells. 

     

    If you wish to apply please email anjana[at]ncbs[dot]res[dot]in with your CV and details of research interest. 

     

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    CONTACT

    ANJANA BADRINARAYANAN

    NATIONAL CENTRE for BIOLOGICAL SCIENCES

    GKVK Campus, Bellary Road,

    Bengaluru, Karnataka 560065

    Phone - 080-23666001

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