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Tiwari A, Pradhan S, Sannigrahi A, Mahakud AK, Jha S, Chattopadhyay K, Biswas M, Saleem M. “Interplay of lipid-head group and packing defects in driving Amyloid-beta mediated myelin-like model membrane deformation”. J Biol Chem 2023; 299:104653. [PMID: 36990217 PMCID: PMC10148160 DOI: 10.1016/j.jbc.2023.104653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 02/24/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Accumulating evidence suggests that amyloid plaque associated myelin lipid loss as a result of elevated amyloid burden might also contribute to Alzheimer's disease. The amyloid fibrils though closely associated with lipids under physiological conditions, however, the progression of membrane remodeling events leading to lipid-fibril assembly remains unknown. Here we first reconstitute the interaction of Aβ-40 with myelin-like model membrane and show that the binding of Aβ-40 induces extensive tubulation. To look into the mechanism of membrane tubulation we chose a set of membrane conditions varying in lipid packing density and net charge that allows us to dissect the contribution of lipid specificity of Aβ-40 binding, aggregation kinetics, and subsequent changes in membrane parameters such as fluidity, diffusion, and compressibility modulus. We show that the binding of Aβ-40 depends predominantly on the lipid packing defect densities and electrostatic interactions and results in rigidification of the myelin-like model membrane during the early phase of amyloid aggregation. Furthermore, elongation of Aβ-40 into higher oligomeric and fibrillar species leads to eventual fluidization of the model membrane followed by extensive lipid membrane tubulation observed in the late phase. Taken together, our results capture mechanistic insights into snapshots of temporal dynamics of Aβ-40 - myelin-like model membrane interaction and demonstrate how short timescale, local phenomena of binding, and fibril-mediated load generation results in the consequent association of lipids with growing amyloid fibrils.
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Sannigrahi A, Rai VH, Chalil MV, Chakraborty D, Meher SK, Roy R. A Versatile Suspended Lipid Membrane System for Probing Membrane Remodeling and Disruption. Membranes (Basel) 2022; 12:1190. [PMID: 36557095 PMCID: PMC9784602 DOI: 10.3390/membranes12121190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/12/2022] [Accepted: 10/18/2022] [Indexed: 06/17/2023]
Abstract
Artificial membrane systems can serve as models to investigate molecular mechanisms of different cellular processes, including transport, pore formation, and viral fusion. However, the current, such as SUVs, GUVs, and the supported lipid bilayers suffer from issues, namely high curvature, heterogeneity, and surface artefacts, respectively. Freestanding membranes provide a facile solution to these issues, but current systems developed by various groups use silicon or aluminum oxide wafers for fabrication that involves access to a dedicated nanolithography facility and high cost while conferring poor membrane stability. Here, we report the development, characterization and applications of an easy-to-fabricate suspended lipid bilayer (SULB) membrane platform leveraging commercial track-etched porous filters (PCTE) with defined microwell size. Our SULB system offers a platform to study the lipid composition-dependent structural and functional properties of membranes with exceptional stability. With dye entrapped in PCTE microwells by SULB, we show that sphingomyelin significantly augments the activity of pore-forming toxin, Cytolysin A (ClyA) and the pore formation induces lipid exchange between the bilayer leaflets. Further, we demonstrate high efficiency and rapid kinetics of membrane fusion by dengue virus in our SULB platform. Our suspended bilayer membrane mimetic offers a novel platform to investigate a large class of biomembrane interactions and processes.
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3
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Abstract
Over the last 25 years, the biology of membrane proteins, including the PFPs-membranes interactions is seeking attention for the development of successful drug molecules against a number of infectious diseases. Pore forming toxins (PFTs), the largest family of PFPs are considered as a group of virulence factors produced in a large number of pathogenic systems which include streptococcus, pneumonia, Staphylococcus aureus, E. coli, Mycobacterium tuberculosis, group A and B streptococci, Corynebacterium diphtheria and many more. PFTs are generally utilized by the disease causing pathogens to disrupt the host first line of defense i.e. host cell membranes through pore formation strategy. Although, pore formation is the principal mode of action of the PFTs but they can have additional adverse effects on the hosts including immune evasion. Recently, structural investigation of different PFTs have imparted the molecular mechanistic insights into how PFTs get transformed from its inactive state to active toxic state. On the basis of their structural entity, PFTs have been classified in different types and their mode of actions alters in terms of pore formation and corresponding cellular toxicity. Although pathogen genome analysis can identify the probable PFTs depending upon their structural diversity, there are so many PFTs which utilize the local environmental conditions to generate their pore forming ability using a novel strategy which is known as "conformational switch" of a protein. This conformational switch is considered as characteristics of the phase shifting proteins which were often utilized by many pathogenic systems to protect them from the invaders through allosteric communication between distant regions of the protein. In this chapter, we discuss the structure function relationships of PFTs and how activity of PFTs varies with the change in the environmental conditions has been explored. Finally, we demonstrate these structural insights to develop therapeutic potential to treat the infections caused by multidrug resistant pathogens.
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Affiliation(s)
- Achinta Sannigrahi
- Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka, India.
| | - Krishnananda Chattopadhyay
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal, India.
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Sannigrahi A, Chowdhury S, Das B, Banerjee A, Halder A, Kumar A, Saleem M, Naganathan AN, Karmakar S, Chattopadhyay K. The metal cofactor zinc and interacting membranes modulate SOD1 conformation-aggregation landscape in an in vitro ALS model. eLife 2021; 10:e61453. [PMID: 33825682 PMCID: PMC8087447 DOI: 10.7554/elife.61453] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 04/01/2021] [Indexed: 12/22/2022] Open
Abstract
Aggregation of Cu-Zn superoxide dismutase (SOD1) is implicated in the motor neuron disease, amyotrophic lateral sclerosis (ALS). Although more than 140 disease mutations of SOD1 are available, their stability or aggregation behaviors in membrane environment are not correlated with disease pathophysiology. Here, we use multiple mutational variants of SOD1 to show that the absence of Zn, and not Cu, significantly impacts membrane attachment of SOD1 through two loop regions facilitating aggregation driven by lipid-induced conformational changes. These loop regions influence both the primary (through Cu intake) and the gain of function (through aggregation) of SOD1 presumably through a shared conformational landscape. Combining experimental and theoretical frameworks using representative ALS disease mutants, we develop a 'co-factor derived membrane association model' wherein mutational stress closer to the Zn (but not to the Cu) pocket is responsible for membrane association-mediated toxic aggregation and survival time scale after ALS diagnosis.
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Affiliation(s)
- Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical BiologyKolkataIndia
| | - Sourav Chowdhury
- Chemistry and Chemical Biology, Harvard UniversityCambridgeUnited States
| | - Bidisha Das
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical BiologyKolkataIndia
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource development Centre CampusGhaziabadIndia
| | | | | | - Amaresh Kumar
- School of Biological Sciences, National Institute of Science Education and Research (NISER)BhubaneswarIndia
| | - Mohammed Saleem
- School of Biological Sciences, National Institute of Science Education and Research (NISER)BhubaneswarIndia
| | - Athi N Naganathan
- Department of Biotechnology, Bhupat & Jyoti Mehta School of Biosciences, Indian Institute of Technology MadrasChennaiIndia
| | | | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical BiologyKolkataIndia
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource development Centre CampusGhaziabadIndia
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Bandyopadhyay A, Sannigrahi A, Chattopadhyay K. Membrane composition and lipid to protein ratio modulate amyloid kinetics of yeast prion protein. RSC Chem Biol 2021; 2:592-605. [PMID: 34458802 PMCID: PMC8341755 DOI: 10.1039/d0cb00203h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/15/2021] [Indexed: 12/22/2022] Open
Abstract
Understanding of prion aggregation in a membrane environment may help to ameliorate neurodegenerative complications caused by the amyloid forms of prions. Here, we investigated the membrane binding-induced aggregation of yeast prion protein Sup35. Using the combination of fluorescence correlation spectroscopy (FCS) at single molecule resolution and other biophysical studies, we establish that lipid composition and lipid/protein ratio are key modulators of the aggregation kinetics of Sup35. In the presence of a zwitterionic membrane (DMPC), Sup35 exhibited novel biphasic aggregation kinetics at lipid/protein ratios ranging between 20 : 1 and 70 : 1 (termed here as the optimum lipid concentration, OLC). In ratios below (low lipid concentration, LLC) and above (ELC, excess lipid concentration) that range, the aggregation was found to be monophasic. In contrast, in the presence of negatively charged membranes, we did not observe any bi-phasic aggregation kinetics in the entire range of protein to lipid ratios. Our results provide a mechanistic description of the role that membrane concentration/composition-modulated aggregation may play in neurodegenerative diseases.
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Affiliation(s)
- Arnab Bandyopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata 700032 India
| | - Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata 700032 India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata 700032 India
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6
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Mandal N, De N, Jana P, Sannigrahi A, Chattopadhyay K. Correlation between CNS Tuberculosis and the COVID-19 Pandemic: The Neurological and Therapeutic Insights. ACS Chem Neurosci 2020; 11:2789-2792. [PMID: 32880441 DOI: 10.1021/acschemneuro.0c00546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The recent outbreak of Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2) from Wuhan, China, was caused by a single-stranded RNA virus which has kept the entire world stranded. The outbreak was first diagnosed with respiratory illness, but recent findings of acute necrotizing hemorrhage of brain, brain encephalopathy, and the presence of the virus in the cerebrospinal fluid (CSF) have unveiled its neuroinvasivness. Various clinical features related to the central nervous system (CNS) and peripheral nervous system (PNS) due to COVID-19 infection are now identified. We demonstrate here an apparent similarity in neurological disorders of COVID-19 with CNS tuberculosis, which suggests that some anti-tubercular drugs may be used as therapeutic agents against COVID-19 infection.
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Affiliation(s)
- Narattam Mandal
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 700032, India
| | - Nayan De
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 700032, India
| | - Pulak Jana
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 700032, India
| | - Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 700032, India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 700032, India
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Kulsi G, Sannigrahi A, Mishra S, Das Saha K, Datta S, Chattopadhyay P, Chattopadhyay K. A Novel Cyclic Mobile Transporter Can Induce Apoptosis by Facilitating Chloride Anion Transport into Cells. ACS Omega 2020; 5:16395-16405. [PMID: 32685802 PMCID: PMC7364434 DOI: 10.1021/acsomega.0c00438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
We report here the preparation of an aminoxy amide-based pseudopeptide-derived building block using furanoid sugar molecules. Through the cyclo-oligomerization reaction, we generate a hybrid triazole/aminoxy amide macrocycle using the as-prepared building block. The novel conformation of the macrocycle has been characterized using NMR and molecular modeling studies, which show a strong resemblance of our synthesized compound to d-,l-α-aminoxy acid-based cyclic peptides that contain uniform backbone chirality. We observe that the macrocycle can efficiently and selectively bind Cl- ion and transport Cl- ion across a lipid bilayer. 1H NMR anion binding studies suggest a coherent relationship between the acidity of aminoxy amide N-H and triazole C-H proton binding strength. Using time-based fluorescence assay, we show that the macrocycle acts as a mobile transporter and follows an antiport mechanism. Our synthesized macrocycle imposes cancer cell death by disrupting ionic homeostasis through Cl- ion transport. The macrocycle induced cytochrome c leakage and changes in mitochondrial membrane potential along with activation of family of caspases, suggesting that the cellular apoptosis occurs through a caspase-dependent intrinsic pathway. The present results suggest the possibility of using the macrocycle as a biological tool of high therapeutic value.
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Affiliation(s)
- Goutam Kulsi
- Structural
Biology and Bioinformatics Division, CSIR-
Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
- Organic
and Medicinal Chemistry Division, CSIR-
Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
| | - Achinta Sannigrahi
- Structural
Biology and Bioinformatics Division, CSIR-
Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
| | - Snehasis Mishra
- Cancer
Biology and Inflammatory Disorder Division, CSIR- Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
- Department
of Chemical Technology, University of Calcutta, Kolkata 700009, India
| | - Krishna Das Saha
- Cancer
Biology and Inflammatory Disorder Division, CSIR- Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
| | - Sriparna Datta
- Department
of Chemical Technology, University of Calcutta, Kolkata 700009, India
| | - Partha Chattopadhyay
- Organic
and Medicinal Chemistry Division, CSIR-
Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
| | - Krishnananda Chattopadhyay
- Structural
Biology and Bioinformatics Division, CSIR-
Indian Institute of Chemical Biology (IICB), Kolkata 700032, India
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8
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Halder A, Sannigrahi A, De N, Chattopadhyay K, Karmakar S. Kinetoplastid Membrane Protein-11 Induces Pores in Anionic Phospholipid Membranes: Effect of Cholesterol. Langmuir 2020; 36:3522-3530. [PMID: 32160748 DOI: 10.1021/acs.langmuir.9b03816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Kinetoplastid membrane protein-11 (KMP-11), expressed in all stages of leishmanial life cycle, is considered a potential candidate for leishmaniasis vaccine. KMP-11 is found on the membrane surface of the parasite. Although the biological function of KMP-11 is unknown, we hypothesize from its sequence analysis that it may interact with the macrophage membrane and may influence the entry process of the parasite into the host cell. To validate this hypothesis, we have investigated the interaction of KMP-11 with unilamellar anionic phospholipid vesicles and explored its pore-forming activity. The decrease in negative ζ-potential of the vesicles and reduction in the fluorescence intensity of membrane-bound dye DiI C-18 suggest a strong association of KMP-11 with the membrane. The fluorescence leakage experiment as well as phase contrast microscopy shows direct evidence of KMP-11-induced pore formation in an anionic membrane. Incorporation of cholesterol into the membrane has been found to inhibit pore formation induced by KMP-11, suggesting an important role of cholesterol in leishmaniasis. Interestingly, vesicles containing only neutral phospholipid do not exhibit any tendency toward pore formation.
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Affiliation(s)
- Animesh Halder
- Soft Matter and Biophysics Laboratory, Department of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Nayan De
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Sanat Karmakar
- Soft Matter and Biophysics Laboratory, Department of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
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Saha S, Sannigrahi A, Chattopadhyay K, Chowdhury J. Interaction of KMP-11 and its mutants with ionic liquid choline dihydrogen phosphate: Multispectroscopic studies aided by docking and molecular dynamics simulations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Sannigrahi A, Chowdhury S, Nandi I, Sanyal D, Chall S, Chattopadhyay K. Development of a near infrared Au-Ag bimetallic nanocluster for ultrasensitive detection of toxic Pb 2+ ions in vitro and inside cells. Nanoscale Adv 2019; 1:3660-3669. [PMID: 36133546 PMCID: PMC9417565 DOI: 10.1039/c9na00459a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 07/29/2019] [Indexed: 05/28/2023]
Abstract
Although the research activities pertaining to the synthesis of fluorescent noble metal nanoclusters (NCs) and their applications in biological optics have been growing, only limited information is available in the near IR (NIR) region. However, fluorescence spectroscopy and microscopy in the NIR region offer significant advantages over UV and visible wavelengths. In this manuscript, we demonstrate bio-mineralized synthesis of stable Au-Ag bimetallic NCs with tunable NIR fluorescence using bovine serum albumin (BSA) as a protein template. We also demonstrate its application in the detection of toxic heavy metal ions Pb2+ in vitro and inside cells. The tunability of the fluorescence emission between 680 nm and 815 nm is achieved by systematically varying the ratio of Au and Ag in the composite NCs. The bimetallic NCs when interacting with Pb2+ offered a large increase in fluorescence intensity, which enabled sensitive detection of Pb2+. We determined a limit of detection (LOD) of 96 nM for the detection of Pb2+ under in vitro conditions, which is significantly less than the safe level in drinking water. Its applicability has also been demonstrated successfully in real water samples collected from local water bodies.
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Affiliation(s)
- Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
| | - Sourav Chowdhury
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
- Department of Chemistry and Chemical Biology, Harvard University 12, Oxford Street Cambridge Massachusetts USA
| | - Indrani Nandi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Dwipanjan Sanyal
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
| | - Sayantani Chall
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mallick Road Kolkata 700032 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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11
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Sannigrahi A, Nandi I, Chall S, Jawed JJ, Halder A, Majumdar S, Karmakar S, Chattopadhyay K. Conformational Switch Driven Membrane Pore Formation by Mycobacterium Secretory Protein MPT63 Induces Macrophage Cell Death. ACS Chem Biol 2019; 14:1601-1610. [PMID: 31241303 DOI: 10.1021/acschembio.9b00327] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Virulent Mycobacterium tuberculosis (MTB) strains cause cell death of macrophages (Mϕ) inside TB granuloma using a mechanism which is not well understood. Many bacterial systems utilize toxins to induce host cell damage, which occurs along with immune evasion. These toxins often use chameleon sequences to generate an environment-sensitive conformational switch, facilitating the process of infection. The presence of toxins is not yet known for MTB. Here, we show that MTB-secreted immunogenic MPT63 protein undergoes a switch from β-sheet to helix in response to mutational and environmental stresses. MPT63 in its helical form creates pores in both synthetic and Mϕ membranes, while the native β-sheet protein remains inert toward membrane interactions. Using fluorescence correlation spectroscopy and atomic force microscopy, we show further that the helical form undergoes self-association to produce toxic oligomers of different morphology. Trypan blue and flow cytometry analyses reveal that the helical state can be utilized by MTB for killing Mϕ cells. Collectively, our study emphasizes for the first time a toxin-like behavior of MPT63 induced by an environment-dependent conformational switch, resulting in membrane pore formation by toxic oligomers and Mϕ cell death.
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Affiliation(s)
- Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Indrani Nandi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sayantani Chall
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | | | - Animesh Halder
- Department of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Subrata Majumdar
- Department of Molecular Medicine, Bose Institute, Kolkata 700054, India
| | - Sanat Karmakar
- Department of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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12
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Som Chaudhury S, Sannigrahi A, Nandi M, Mishra VK, De P, Chattopadhyay K, Mishra S, Sil J, Das Mukhopadhyay C. A Novel PEGylated Block Copolymer in New Age Therapeutics for Alzheimer’s Disease. Mol Neurobiol 2019; 56:6551-6565. [DOI: 10.1007/s12035-019-1542-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 02/27/2019] [Indexed: 12/15/2022]
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13
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Sannigrahi A, Chall S, Jawed JJ, Kundu A, Majumdar S, Chattopadhyay K. Nanoparticle Induced Conformational Switch Between α-Helix and β-Sheet Attenuates Immunogenic Response of MPT63. Langmuir 2018; 34:8807-8817. [PMID: 29986589 DOI: 10.1021/acs.langmuir.8b00354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Although significant efforts have been devoted to develop nanoparticle-based biopharmaceuticals, it is not understood how protein conformation and nanoparticle surface modulate each other in optimizing the activity and/or toxicity of the biological molecules. This is particularly important for a protein, which can adopt different conformational states separated by a relatively small energy barrier. In this paper, we have studied nanoparticle binding-induced conformational switch from β-sheet to α-helix of MPT63, a small major secreted protein from Mycobacterium tuberculosis and a drug target against Tuberculosis. The binding of magnetite nanoparticles to MPT63 results in a β-sheet to α-helix switch near the sequence stretch between the 19th and 30th amino acids. As a consequence, the immunogenic response of the protein becomes compromised, which could be restored by protein engineering. This study emphasizes that conformational stability toward NP surface binding may require optimization involving genetic engineering for development of a nanoparticle conjugated pharmaceutical.
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Affiliation(s)
- Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mallick Road , Kolkata 700032 , India
| | - Sayantani Chall
- Structural Biology & Bio-Informatics Division , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mallick Road , Kolkata 700032 , India
| | | | - Amrita Kundu
- Structural Biology & Bio-Informatics Division , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mallick Road , Kolkata 700032 , India
| | - Subrata Majumdar
- Department of Molecular Medicine , Bose Institute , Kolkata 700054 , India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mallick Road , Kolkata 700032 , India
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14
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Sannigrahi A, Maity P, Karmakar S, Chattopadhyay K. Interaction of KMP-11 with Phospholipid Membranes and Its Implications in Leishmaniasis: Effects of Single Tryptophan Mutations and Cholesterol. J Phys Chem B 2017; 121:1824-1834. [DOI: 10.1021/acs.jpcb.6b11948] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Achinta Sannigrahi
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Pabitra Maity
- Department
of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Sanat Karmakar
- Department
of Physics, Jadavpur University, 188, Raja S. C. Mallick Road, Kolkata 700032, India
| | - Krishnananda Chattopadhyay
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mallick Road, Kolkata 700032, India
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