CCMB

CSIR - Centre for Cellular & Molecular Biology

The Innovation Engine of India

Raghunand R Tirumalai

Raghunand R Tirumalai

Raghunand R Tirumalai

Scientist-F
Pathobiology of Mycobacterium tuberculosis
2924
raghu[at]ccmb[dot]res[dot]in

Research Interests

The extraordinary success of Mycobacterium tuberculosis (M.tb), the etiologic agent of human tuberculosis (TB), has been attributed to its ability to modulate host immune responses, facilitating its long term persistence. We believe that understanding the basic biology of the pathogen and its interactions with the host, is the best way forward towards the development of improved diagnostic reagents, vaccines and novel anti-TB drugs. Research in our laboratory is focussed towards the identification of bacillary virulence factors, characterising the events at the host-pathogen interface, and the discovery of novel antibiotic resistance mechanisms.

Selected Publications

Savanagouder, M.*, Mukku R.P.*, Yeruva, C.V., Nagarajan, N., Peddapuvala U.K., Sharma, Y. and Raghunand, T. R. (2024) Dissecting the Ca2+ dependence of Mycobacterium tuberculosis DesA1 function. Manuscript Accepted FEBS Letters BioRxiv https://doi.org/10.1101/2023.03.31.535087

Ramachandran, G., Yeruva, C.V., Swarup, G. and Raghunand, T. R.(2024) A cytoprotective role for optineurin during mycobacterial infection of macrophages. Biochemistry and Biophysics Rep. 38: 101672. doi: 10.1016/j.bbrep.2024.101672

Mukku R.P., Poornima, K., Yadav, S. and Raghunand, T. R.(2023) Delineating the functional role of the PPE50 (Rv3135) – PPE51 (Rv3136) gene cluster in the pathophysiology of Mycobacterium tuberculosis. Microbes and Infection. https://doi.org/10.1016/j.micinf.2023.105248

Kishore, V, Gaiwala, S.G., and Raghunand, T. R. (2023) Septum site placement in Mycobacteria – Identification and Characterization of Mycobacterial homologues of Escherichia coli MinD. Microbiology 169:001359 DOI 10.1099/mic.0.001359

Dutta, A., Mukku, R.P., Kumar, G. A., Md. Jafurulla, Raghunand, T. R* and Chattopadhyay, A.* (2022) Integrity of the Actin Cytoskeleton of Host Macrophages is Necessary for Mycobacterial Entry. J Membrane Biol 255:623-632 https://doi.org/10.1007/s00232-022-00217-1. This article featured on the cover page of the journal

Education & Experience

P.G:

Biotechnology ; Indian Institute of Technology, Bombay, India ; 1994

Ph.D:

Molecular Analysis of beta-glucoside utilisation in Klebsiella aerogenes ; Indian Institute of Science, Bangalore, India ; 2001

Post.Doc:

Mycobacterial Pathogenesis ; Johns Hopkins School of Medicine, Baltimore, USA ; 2001-2007

Team Members

team-members-pic
Raghunand R Tirumalai
Raghunand R Tirumalai

Scientist-F

Scientist-F

Sarmishta Mukhopadhyay
Sarmishta Mukhopadhyay

BioCARe Fellow (DBT)

BioCARe Fellow (DBT)

Moirangthem Veigyabati Devi
Moirangthem Veigyabati Devi

Research Associate (DBT)

Research Associate (DBT)

Korak Chakraborty
Korak Chakraborty

Senior Research Fellow

Senior Research Fellow

Simran Sharma
Simran Sharma

Senior Research Fellow

Senior Research Fellow

Rohit Ajitsingh Macharekar
Rohit Ajitsingh Macharekar

Senior Research Fellow

Senior Research Fellow

Md Saquib Ali
Md Saquib Ali

Junior Research Fellow

Junior Research Fellow

Jahnavi Chivukula
Jahnavi Chivukula

Junior Research Fellow

Junior Research Fellow

Dasari Vatsalya
Dasari Vatsalya

Project Associate -I

Project Associate -I

Mihina Pradhan
Mihina Pradhan

Project Associate-I

Project Associate-I

Publications

Title

Journal

Year

Dissecting the Ca2+ dependence of Mycobacterium tuberculosis DesA1 function
FEBS Letters
2024
A cytoprotective role for optineurin during mycobacterial infection of macrophages.
Biochemistry and Biophysics Reports
2024
Delineating the functional role of the PPE50 (Rv3135) - PPE51 (Rv3136) gene cluster in the pathophysiology of Mycobacterium tuberculosis
Microbes and Infection
2023
Septum site placement in Mycobacteria - Identification and Characterization of Mycobacterial homologues of Escherichia coli MinD
Microbiology
2023
Optineurin modulates ER stress-induced signaling pathways and cell death
Biochemical and Biophysical Research Communications
2020
Macrophage sphingolipids are essential for the entry of mycobacteria
Chem Phys Lipids 213:25-31
2018
Insights into the function of FhaA, a cell-division associated protein in mycobacteria.
FEMS Microbiology Letters 364 (2):fnw294
2017
Identification of mycobacterial genes involved in β-lactam sensitivity - Implications in treatment of tuberculosis with β-lactam containing regimens
Antimicrobial Agents and Chemotherapy 61(7) e00425-17. https://doi .org/10.1128/AAC.00425-17
2017
Identification of Novel Loci Associated with Mycobacterial Isoniazid Resistance
Tuberculosis 96:21-26
2016
The PE_PGRS proteins of Mycobacterium tuberculosis are Ca2+ binding mediators of host-pathogen interaction
Biochemistry(ACS)55(33):4675-87
2016
Identification and functional annotation of mycobacterial septum formation genes using cell division mutants of Escherichia coli
Res Microbiol, 167(2):142-8
2016
The Mycobacterium tuberculosis desaturase DesA1 (Rv0824c) is a Ca2+ binding protein
Biochem Biophys Res Comm 480(1):29-35
2016
The Mycobacterium tuberculosis protein pair PE9 (Rv1088) - PE10 (Rv1089) forms heterodimers and induces macrophage apoptosis through TLR4
Cellular Microbiol 17(11): 1653-1669
2015
Identifying novel mycobacterial stress associated genes using a random mutagenesis screen in Mycobacterium smegmatis
Gene 574(1):20-27
2015
An immunomodulatory role for the Mycobacterium tuberculosis RD1 locus proteins PE35 (Rv3872) and PPE68 (Rv3873)
Febs J 281:1556-70
2014
The Mycobacterium tuberculosis PE Proteins Rv0285 and Rv1386 Modulate Innate Immunity and Mediate Bacillary Survival in Macrophages
PLoS ONE 7(12): e51686. doi:10.1371/journal.pone.0051686
2012
Characterization of clioquinol and analogues as novel inhibitors of methionine aminopeptidases from Mycobacterium tuberculosis
Tuberculosis (Edinb) 91S1:S61-S65. Epub 2011 Nov 23
2011
Methionine Aminopeptidases from Mycobacterium tuberculosis as Novel Antimycobacterial Targets
Chemistry and Biology. 17(1):86-97
2010
A Reproducible Bronchoscopic Model of Cavitary Tuberculosis Using Tuberculin-Sensitized Infected Outbred Rabbits
Infect.& Immunity.77(2):598-603
2008
Mapping essential domains of Mycobacterium smegmatis WhmD: Insights into WhiB structure and function
J. Bacteriol.188 (19): 6966-6976
2006
Mycobacterium smegmatis whmD and its homologue Mycobacterium tuberculosis whiB2 are functionally equivalent.
Microbiology 152(9): 2735-2747
2006
Towards establishing a method to screen for inhibitors of essential genes in mycobacteria: Evaluation of the Acetamidase promoter
Int. J. Antimicrob. Agents 28(1): 37-42
2006
Regulation of the expression of whiB1 in Mycobacterium tuberculosis: Role of cAMP receptor protein
Microbiology 152(9): 2749-2756
2006
Differential gene expression in response to antibiotic exposure, growth phase, and stress conditions among the seven Mycobacterium tuberculosis whiB-like genes
Antimicrob. Agents Chemother. 50(8):2836-2841
2006
Deletion of a Mycobacterium tuberculosis proteasomal ATPase homologue produces a slow growing strain which persists in host tissues
J. Infect. Dis.194:1233-1240
2006
Mutational analysis of β-glucoside utilisation in Klebsiella aerogenes: evidence for the presence of multiple genetic systems
J. Genetics. 83(3): 285-289
2004
The beta-glucoside genes of Klebsiella aerogenes: conservation and divergence in relation to the cryptic bgl genes of Escherichia coli.
FEMS Microbiol. Lett. 223(2):267-74
2003
Transgene Silencing: New insights into an old puzzle.
J Biosciences 23(5): 539-540
1998
Characterisation of 3
Gene 190:69-76
1997
Molecular clues to the control of circadian rhythms.
Resonance 1(4): 76-81
1996
Integrity of the Actin Cytoskeleton of Host Macrophages is Necessary for Mycobacterial Entry
The Journal of Membrane Biology
2022
Dissecting the Membrane Cholesterol Requirement for Mycobacterial Entry into Host Cells
Chem. Phys. Lipids 189: 19-27.
2015

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