LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 21

Search options

  1. Article ; Online: HRMAS-NMR and simulation study of the self-assembly of surfactants on carbon nanotubes.

    Singh, Raman Preet / Kaur, Taranpreet

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 18, Page(s) 12900–12913

    Abstract: Polyethoxylated surfactants, such as those of the Tween and Pluronic series, are commonly used to disperse carbon nanotubes (CNTs) and other nanoparticles. However, the current understanding of the nature of interactions between these surfactants and ... ...

    Abstract Polyethoxylated surfactants, such as those of the Tween and Pluronic series, are commonly used to disperse carbon nanotubes (CNTs) and other nanoparticles. However, the current understanding of the nature of interactions between these surfactants and CNTs is limited. The nature of the interactions between surfactants (Tween-80 [T80] and Pluronic F68 [PF68]) and CNTs was investigated using high-resolution magic angle spinning nuclear magnetic resonance (HRMAS-NMR) and coarse-grained molecular dynamics (MD) simulations. HRMAS-NMR revealed that T80 molecules interact with single-walled CNTs (SWCNTs) and multi-walled CNTs (MWCNTs)
    Language English
    Publishing date 2023-05-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp03762a
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Evaluation of the Effect of Vitamin D Levels During the Last Trimester of Pregnancy on Fetomaternal Outcomes in Patients With Preeclampsia.

    Saini, Shweta / Kumari, Kalpana / Rai, Priyanka / Kaur, Taranpreet / Raj, Manish

    Cureus

    2023  Volume 15, Issue 11, Page(s) e49145

    Abstract: Introduction Preeclampsia is a multisystem disorder with hypertension after 20 weeks of gestation. Among many predictors of preeclampsia, vitamin D being one of them is under many studies for establishing a correlation between levels of vitamin D and ... ...

    Abstract Introduction Preeclampsia is a multisystem disorder with hypertension after 20 weeks of gestation. Among many predictors of preeclampsia, vitamin D being one of them is under many studies for establishing a correlation between levels of vitamin D and preeclampsia. Objective To observe a relation between vitamin D levels and preeclampsia and assess related fetomaternal outcomes. Method It is an observational study at the tertiary care center. One hundred twenty patients, out of which 60 were taken as cases with BP>140/90, and 60 were taken as controls with normal BP in a tertiary care center from January 1, 2020, to June 30, 2021. All investigations were sent, and the mode of delivery and the fetomaternal outcome were assessed. Results Compared to normal pregnant patients, preeclamptic patients have significantly lower levels of vitamin D with a p-value of <0.001, which is significant. Conclusion There is a relationship between vitamin D levels and preeclampsia. However, the effects of supplementation of vitamin D on fetomaternal outcomes need further studies.
    Language English
    Publishing date 2023-11-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.49145
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Methods for characterizing the material properties of biomolecular condensates.

    Alshareedah, Ibraheem / Kaur, Taranpreet / Banerjee, Priya R

    Methods in enzymology

    2020  Volume 646, Page(s) 143–183

    Abstract: Biomolecular condensates are membrane-less sub-cellular compartments that perform a plethora of important functions in signaling and storage. The material properties of biomolecular condensates such as viscosity, surface tension, viscoelasticity, and ... ...

    Abstract Biomolecular condensates are membrane-less sub-cellular compartments that perform a plethora of important functions in signaling and storage. The material properties of biomolecular condensates such as viscosity, surface tension, viscoelasticity, and macromolecular diffusion play important roles in regulating their biological functions. Aberrations in these properties have been implicated in various neurodegenerative disorders and certain types of cancer. Unraveling the molecular driving forces that control the fluid structure and dynamics of biomolecular condensates across different length- and time-scales necessitates the application of innovative biophysical methodologies. In this chapter, we discuss major experimental techniques that are widely used to study the material states and dynamics of biomolecular condensates as well as their practical and conceptual limitations. We end this chapter with a discussion on more advanced tools that are currently emerging to address the complex fluid dynamics of these condensates.
    MeSH term(s) Diffusion ; Macromolecular Substances ; Viscosity
    Chemical Substances Macromolecular Substances
    Language English
    Publishing date 2020-07-22
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 1557-7988
    ISSN (online) 1557-7988
    DOI 10.1016/bs.mie.2020.06.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: FUS oncofusion protein condensates recruit mSWI/SNF chromatin remodeler via heterotypic interactions between prion-like domains.

    Davis, Richoo B / Kaur, Taranpreet / Moosa, Mahdi Muhammad / Banerjee, Priya R

    Protein science : a publication of the Protein Society

    2021  Volume 30, Issue 7, Page(s) 1454–1466

    Abstract: Fusion transcription factors generated by genomic translocations are common drivers of several types of cancers including sarcomas and leukemias. Oncofusions of the FET (FUS, EWSR1, and TAF15) family proteins result from the fusion of the prion-like ... ...

    Abstract Fusion transcription factors generated by genomic translocations are common drivers of several types of cancers including sarcomas and leukemias. Oncofusions of the FET (FUS, EWSR1, and TAF15) family proteins result from the fusion of the prion-like domain (PLD) of FET proteins to the DNA-binding domain (DBD) of certain transcription regulators and are implicated in aberrant transcriptional programs through interactions with chromatin remodelers. Here, we show that FUS-DDIT3, a FET oncofusion protein, undergoes PLD-mediated phase separation into liquid-like condensates. Nuclear FUS-DDIT3 condensates can recruit essential components of the global transcriptional machinery such as the chromatin remodeler SWI/SNF. The recruitment of mammalian SWI/SNF (mSWI/SNF) is driven by heterotypic PLD-PLD interactions between FUS-DDIT3 and core subunits of SWI/SNF, such as the catalytic component BRG1. Further experiments with single-molecule correlative force-fluorescence microscopy support a model wherein the fusion protein forms condensates on DNA surface and enrich BRG1 to activate transcription by ectopic chromatin remodeling. Similar PLD-driven co-condensation of mSWI/SNF with transcription factors can be employed by other oncogenic fusion proteins with a generic PLD-DBD domain architecture for global transcriptional reprogramming.
    MeSH term(s) Cell Line ; Chromosomal Proteins, Non-Histone/chemistry ; Chromosomal Proteins, Non-Histone/genetics ; Chromosomal Proteins, Non-Histone/metabolism ; Humans ; Microscopy, Fluorescence ; Oncogene Proteins, Fusion/chemistry ; Oncogene Proteins, Fusion/genetics ; Oncogene Proteins, Fusion/metabolism ; Prions/chemistry ; Prions/genetics ; Prions/metabolism ; Protein Domains ; RNA-Binding Protein FUS/chemistry ; RNA-Binding Protein FUS/genetics ; RNA-Binding Protein FUS/metabolism ; Transcription Factors/chemistry ; Transcription Factors/genetics ; Transcription Factors/metabolism
    Chemical Substances Chromosomal Proteins, Non-Histone ; FUS protein, human ; Oncogene Proteins, Fusion ; Prions ; RNA-Binding Protein FUS ; SWI-SNF-B chromatin-remodeling complex ; Transcription Factors
    Language English
    Publishing date 2021-06-04
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1106283-6
    ISSN 1469-896X ; 0961-8368
    ISSN (online) 1469-896X
    ISSN 0961-8368
    DOI 10.1002/pro.4127
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Characterization and toxicity of a phosphate-binding exobiopolymer produced by Acinetobacter haemolyticus MG606.

    Kaur, Taranpreet / Ghosh, Moushumi

    Journal of water and health

    2017  Volume 15, Issue 1, Page(s) 103–111

    Abstract: A novel, phosphate-binding exobiopolymer (EBP) produced by Acinetobacter haemolyticus MG606 was characterized and its biocompatibility evaluated in RAW 264.7 cells and in mice. EBP was identified as a 50 kDa heteropolysaccharide composed of pentose and ... ...

    Abstract A novel, phosphate-binding exobiopolymer (EBP) produced by Acinetobacter haemolyticus MG606 was characterized and its biocompatibility evaluated in RAW 264.7 cells and in mice. EBP was identified as a 50 kDa heteropolysaccharide composed of pentose and hexose sugars. EBP exhibited cytotoxicity, stimulation of free radical production and loss of mitochondrial and lysosomal integrity in RAW 264.7 cells at 500 μg/mL concentration while lower concentrations exhibited no significant (p > 0.05) effect on these parameters. EBP exhibited dose-dependent mortality, body weight reduction, hypothermia and clinical signs of toxicity in mice following intraperitoneal administration. The LD
    MeSH term(s) Acinetobacter/chemistry ; Acinetobacter/metabolism ; Animals ; Biopolymers/analysis ; Biopolymers/toxicity ; Female ; Injections, Intraperitoneal ; Mice ; Phosphates/metabolism ; RAW 264.7 Cells ; Toxicity Tests
    Chemical Substances Biopolymers ; Phosphates
    Language English
    Publishing date 2017-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2123845-5
    ISSN 1996-7829 ; 1477-8920
    ISSN (online) 1996-7829
    ISSN 1477-8920
    DOI 10.2166/wh.2016.176
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Sequence-encoded and composition-dependent protein-RNA interactions control multiphasic condensate morphologies.

    Kaur, Taranpreet / Raju, Muralikrishna / Alshareedah, Ibraheem / Davis, Richoo B / Potoyan, Davit A / Banerjee, Priya R

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 872

    Abstract: Multivalent protein-protein and protein-RNA interactions are the drivers of biological phase separation. Biomolecular condensates typically contain a dense network of multiple proteins and RNAs, and their competing molecular interactions play key roles ... ...

    Abstract Multivalent protein-protein and protein-RNA interactions are the drivers of biological phase separation. Biomolecular condensates typically contain a dense network of multiple proteins and RNAs, and their competing molecular interactions play key roles in regulating the condensate composition and structure. Employing a ternary system comprising of a prion-like polypeptide (PLP), arginine-rich polypeptide (RRP), and RNA, we show that competition between the PLP and RNA for a single shared partner, the RRP, leads to RNA-induced demixing of PLP-RRP condensates into stable coexisting phases-homotypic PLP condensates and heterotypic RRP-RNA condensates. The morphology of these biphasic condensates (non-engulfing/ partial engulfing/ complete engulfing) is determined by the RNA-to-RRP stoichiometry and the hierarchy of intermolecular interactions, providing a glimpse of the broad range of multiphasic patterns that are accessible to these condensates. Our findings provide a minimal set of physical rules that govern the composition and spatial organization of multicomponent and multiphasic biomolecular condensates.
    MeSH term(s) Amino Acid Sequence ; Arginine/metabolism ; Base Sequence ; Peptides/metabolism ; Prions/metabolism ; RNA/metabolism ; RNA-Binding Proteins/chemistry ; RNA-Binding Proteins/metabolism ; Surface Tension
    Chemical Substances Peptides ; Prions ; RNA-Binding Proteins ; RNA (63231-63-0) ; Arginine (94ZLA3W45F)
    Language English
    Publishing date 2021-02-08
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-21089-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Acinetobacter haemolyticus MG606 produces a novel, phosphate binding exobiopolymer.

    Kaur, Taranpreet / Ghosh, Moushumi

    Carbohydrate polymers

    2015  Volume 132, Page(s) 72–79

    Abstract: The present study evaluated an extracellular, novel biopolymer produced by Acinetobacter haemolyticus MG606 for its physicochemical properties and phosphate binding mechanism. The exobiopolymer (EBP) was characterized to be majorly polysaccharide in ... ...

    Abstract The present study evaluated an extracellular, novel biopolymer produced by Acinetobacter haemolyticus MG606 for its physicochemical properties and phosphate binding mechanism. The exobiopolymer (EBP) was characterized to be majorly polysaccharide in nature consisting of 48.9 kDa heteropolysaccharide composed of galactose, glucose, xylose, lyxose, allose, ribose, arabinose, mannose and fructose. Maximum phosphate binding efficiency of 25mg phosphate/g of EBP was described by Langmuir isotherm and further, the physicochemical and spectroscopic studies revealed that phosphate appeared to bind predominantly with the polysaccharide fraction, and to a relatively lesser extent to protein fraction of EBP. The electrostatic interactions with amino groups and ligand exchange with hydroxyl groups of EBP were found to be primary basis for phosphate binding mechanism. The results of this study implicate the feasibility of the EBP for commercial bioremediation processes.
    MeSH term(s) Acinetobacter/chemistry ; Acinetobacter/metabolism ; Biodegradation, Environmental ; Environmental Pollutants/isolation & purification ; Environmental Pollutants/metabolism ; Phosphates/isolation & purification ; Phosphates/metabolism ; Polysaccharides/chemistry ; Polysaccharides/metabolism
    Chemical Substances Environmental Pollutants ; Phosphates ; Polysaccharides
    Language English
    Publishing date 2015-11-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1501516-6
    ISSN 1879-1344 ; 0144-8617
    ISSN (online) 1879-1344
    ISSN 0144-8617
    DOI 10.1016/j.carbpol.2015.06.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Characterization and upregulation of bifunctional phosphoglucomutase/phosphomannomutase enzyme in an exobiopolymer overproducing strain of Acinetobacter haemolyticus.

    Kaur, Taranpreet / Ghosh, Moushumi

    Microbiological research

    2015  Volume 181, Page(s) 8–14

    Abstract: Several members of the Acinetobacter spp. produce exobiopolymer (EBP) of considerable biotechnological interest. In a previous study, we reported phosphate removal capacity of EBP produced by Acinetobacter haemolyticus. Insertional mutagenesis was ... ...

    Abstract Several members of the Acinetobacter spp. produce exobiopolymer (EBP) of considerable biotechnological interest. In a previous study, we reported phosphate removal capacity of EBP produced by Acinetobacter haemolyticus. Insertional mutagenesis was attempted to develop EBP-overproducing strains of A. haemolyticus and mutant MG606 was isolated. In order to understand the underlying mechanism of overproduction, the EBP overproducing mutant MG606 was analyzed and compared with the wild type counterpart for its key EBP synthetic enzymes. The EBP produced by MG606 mutant was 650 mg/L compared to 220 mg/L in its wild type counterpart. Significantly high (p<0.05) levels of phosphoglucomutase/phosphomannomutase (PGM/PMM) in MG606 mutant was noted, whereas activities of other enzymes responsible for EBP synthesis showed no significant change (p>0.05). The up-regulation of PGM/PMM expression in mutant was further confirmed by real time reverse transcriptase (RT)-PCR of PGM/PMM transcripts. The optimal conditions for PGM/PMM activity were found to be 35 °C and pH 7.5; PGM/PMM activity was inhibited by ions such as lithium, zinc, nickel. Further, incubation of cells with a PGM inhibitor (lithium) resulted in a concentration-dependent decrease in EBP production further confirming the role of PGM/PMM overexpression in enhanced EBP production by the mutant. Overall the results of our study indicate a key role of PGM/PMM in enhanced EBP production, as evident from enhanced enzyme activity, increased PGM/PMM transcripts and reduction in EBP synthesis by a PGM inhibitor. We envisage a potential exploitation of the insights so obtained to effectively engineer strains of Acinetobacter for overproducing phosphate binding EBP.
    MeSH term(s) Acinetobacter/drug effects ; Acinetobacter/enzymology ; Acinetobacter/genetics ; Electrophoresis, Polyacrylamide Gel ; Mutagenesis, Insertional ; Phosphoglucomutase/chemistry ; Phosphoglucomutase/genetics ; Phosphoglucomutase/metabolism ; Phosphotransferases (Phosphomutases)/chemistry ; Phosphotransferases (Phosphomutases)/genetics ; Phosphotransferases (Phosphomutases)/metabolism ; RNA-Directed DNA Polymerase ; Real-Time Polymerase Chain Reaction ; Substrate Specificity ; Transcriptional Activation ; Up-Regulation
    Chemical Substances RNA-Directed DNA Polymerase (EC 2.7.7.49) ; Phosphotransferases (Phosphomutases) (EC 5.4.2.-) ; Phosphoglucomutase (EC 5.4.2.2) ; phosphomannomutase (EC 5.4.2.8)
    Language English
    Publishing date 2015-12
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1189614-0
    ISSN 1618-0623 ; 0944-5013
    ISSN (online) 1618-0623
    ISSN 0944-5013
    DOI 10.1016/j.micres.2015.08.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Characterization and upregulation of bifunctional phosphoglucomutase/phosphomannomutase enzyme in an exobiopolymer overproducing strain of Acinetobacter haemolyticus

    Kaur, Taranpreet / Moushumi Ghosh

    Microbiological research. 2015 Dec., v. 181

    2015  

    Abstract: Several members of the Acinetobacter spp. produce exobiopolymer (EBP) of considerable biotechnological interest. In a previous study, we reported phosphate removal capacity of EBP produced by Acinetobacter haemolyticus. Insertional mutagenesis was ... ...

    Abstract Several members of the Acinetobacter spp. produce exobiopolymer (EBP) of considerable biotechnological interest. In a previous study, we reported phosphate removal capacity of EBP produced by Acinetobacter haemolyticus. Insertional mutagenesis was attempted to develop EBP-overproducing strains of A. haemolyticus and mutant MG606 was isolated. In order to understand the underlying mechanism of overproduction, the EBP overproducing mutant MG606 was analyzed and compared with the wild type counterpart for its key EBP synthetic enzymes. The EBP produced by MG606 mutant was 650mg/L compared to 220mg/L in its wild type counterpart. Significantly high (p<0.05) levels of phosphoglucomutase/phosphomannomutase (PGM/PMM) in MG606 mutant was noted, whereas activities of other enzymes responsible for EBP synthesis showed no significant change (p>0.05). The up-regulation of PGM/PMM expression in mutant was further confirmed by real time reverse transcriptase (RT)-PCR of PGM/PMM transcripts. The optimal conditions for PGM/PMM activity were found to be 35°C and pH 7.5; PGM/PMM activity was inhibited by ions such as lithium, zinc, nickel. Further, incubation of cells with a PGM inhibitor (lithium) resulted in a concentration-dependent decrease in EBP production further confirming the role of PGM/PMM overexpression in enhanced EBP production by the mutant. Overall the results of our study indicate a key role of PGM/PMM in enhanced EBP production, as evident from enhanced enzyme activity, increased PGM/PMM transcripts and reduction in EBP synthesis by a PGM inhibitor. We envisage a potential exploitation of the insights so obtained to effectively engineer strains of Acinetobacter for overproducing phosphate binding EBP.
    Keywords Acinetobacter haemolyticus ; enzyme activity ; gene expression regulation ; gene overexpression ; insertional mutagenesis ; ions ; lithium ; mutants ; nickel ; pH ; phosphates ; phosphoglucomutase ; phosphomannomutase ; RNA-directed DNA polymerase ; zinc
    Language English
    Dates of publication 2015-12
    Size p. 8-14.
    Publishing place Elsevier GmbH
    Document type Article
    ZDB-ID 1189614-0
    ISSN 1618-0623 ; 0944-5013
    ISSN (online) 1618-0623
    ISSN 0944-5013
    DOI 10.1016/j.micres.2015.08.003
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article: Acinetobacter haemolyticus MG606 produces a novel, phosphate binding exobiopolymer

    Kaur, Taranpreet / Moushumi Ghosh

    Carbohydrate polymers. 2015 Nov. 05, v. 132

    2015  

    Abstract: The present study evaluated an extracellular, novel biopolymer produced by Acinetobacter haemolyticus MG606 for its physicochemical properties and phosphate binding mechanism. The exobiopolymer (EBP) was characterized to be majorly polysaccharide in ... ...

    Abstract The present study evaluated an extracellular, novel biopolymer produced by Acinetobacter haemolyticus MG606 for its physicochemical properties and phosphate binding mechanism. The exobiopolymer (EBP) was characterized to be majorly polysaccharide in nature consisting of 48.9kDa heteropolysaccharide composed of galactose, glucose, xylose, lyxose, allose, ribose, arabinose, mannose and fructose. Maximum phosphate binding efficiency of 25mg phosphate/g of EBP was described by Langmuir isotherm and further, the physicochemical and spectroscopic studies revealed that phosphate appeared to bind predominantly with the polysaccharide fraction, and to a relatively lesser extent to protein fraction of EBP. The electrostatic interactions with amino groups and ligand exchange with hydroxyl groups of EBP were found to be primary basis for phosphate binding mechanism. The results of this study implicate the feasibility of the EBP for commercial bioremediation processes.
    Keywords Acinetobacter haemolyticus ; allose ; arabinose ; biopolymers ; bioremediation ; electrostatic interactions ; fructose ; galactose ; glucose ; ligands ; mannose ; phosphates ; polysaccharides ; ribose ; sorption isotherms ; spectral analysis ; xylose
    Language English
    Dates of publication 2015-1105
    Size p. 72-79.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1501516-6
    ISSN 1879-1344 ; 0144-8617
    ISSN (online) 1879-1344
    ISSN 0144-8617
    DOI 10.1016/j.carbpol.2015.06.002
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top