Krishanu Ray

Summary

Affiliation: University of Maryland
Country: USA

Publications

  1. pmc Portal control of viral prohead expansion and DNA packaging
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
    Virology 391:44-50. 2009
  2. pmc DNA crunching by a viral packaging motor: Compression of a procapsid-portal stalled Y-DNA substrate
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N Greene St, Baltimore, MD 21201, USA
    Virology 398:224-32. 2010
  3. pmc Single-molecule spectroscopic study of enhanced intrinsic phycoerythrin fluorescence on silver nanostructured surfaces
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 80:6942-8. 2008
  4. pmc Fluorescence lifetime correlation spectroscopic study of fluorophore-labeled silver nanoparticles
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 80:7313-8. 2008
  5. pmc Single-molecule and FRET fluorescence correlation spectroscopy analyses of phage DNA packaging: colocalization of packaged phage T4 DNA ends within the capsid
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 North Greene Street, Baltimore, MD 21201, USA
    J Mol Biol 395:1102-13. 2010
  6. pmc Enhanced fluorescence of proteins and label-free bioassays using aluminum nanostructures
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard St, Baltimore, Maryland 21201, USA
    Anal Chem 81:6049-54. 2009
  7. pmc Compression of the DNA substrate by a viral packaging motor is supported by removal of intercalating dye during translocation
    Aparna Banerjee Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
    Proc Natl Acad Sci U S A 109:20419-24. 2012
  8. pmc Aluminum nanoparticles as substrates for metal-enhanced fluorescence in the ultraviolet for the label-free detection of biomolecules
    Mustafa H Chowdhury
    Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 81:1397-403. 2009
  9. pmc The C-terminal domain of the bacteriophage T4 terminase docks on the prohead portal clip region during DNA packaging
    Aparna Banerjee Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108N Greene St, Baltimore, MD 21201, USA
    Virology 446:293-302. 2013
  10. pmc Dynamics of the T4 bacteriophage DNA packasome motor: endonuclease VII resolvase release of arrested Y-DNA substrates
    Aparna Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201 1503, USA
    J Biol Chem 286:18878-89. 2011

Collaborators

Detail Information

Publications24

  1. pmc Portal control of viral prohead expansion and DNA packaging
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
    Virology 391:44-50. 2009
    ..These data suggest the portal controls the expansion of the major capsid protein lattice during prohead maturation, and that this expansion is necessary for DNA protection but not for packaging...
  2. pmc DNA crunching by a viral packaging motor: Compression of a procapsid-portal stalled Y-DNA substrate
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N Greene St, Baltimore, MD 21201, USA
    Virology 398:224-32. 2010
    ..Torsional compression of duplex DNA is thus implicated in the mechanism of DNA translocation...
  3. pmc Single-molecule spectroscopic study of enhanced intrinsic phycoerythrin fluorescence on silver nanostructured surfaces
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 80:6942-8. 2008
    ....
  4. pmc Fluorescence lifetime correlation spectroscopic study of fluorophore-labeled silver nanoparticles
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 80:7313-8. 2008
    ..Our results also suggest that these bright fluorophores conjugated to silver particles could be used as the fluorescent probes for clinical detection in the biological samples with the high background...
  5. pmc Single-molecule and FRET fluorescence correlation spectroscopy analyses of phage DNA packaging: colocalization of packaged phage T4 DNA ends within the capsid
    Krishanu Ray
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 North Greene Street, Baltimore, MD 21201, USA
    J Mol Biol 395:1102-13. 2010
    ..The analysis suggests that a DNA loop, rather than a DNA end, is translocated by the packaging motor to fill the procapsid...
  6. pmc Enhanced fluorescence of proteins and label-free bioassays using aluminum nanostructures
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard St, Baltimore, Maryland 21201, USA
    Anal Chem 81:6049-54. 2009
    ..Binding of streptavidin to the biotinylated aluminum surface was demonstrated in the presence of 100 microg/mL bovine serum albumin in the sample solution by measurements of tryptophan intensity and lifetime changes...
  7. pmc Compression of the DNA substrate by a viral packaging motor is supported by removal of intercalating dye during translocation
    Aparna Banerjee Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
    Proc Natl Acad Sci U S A 109:20419-24. 2012
    ....
  8. pmc Aluminum nanoparticles as substrates for metal-enhanced fluorescence in the ultraviolet for the label-free detection of biomolecules
    Mustafa H Chowdhury
    Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Anal Chem 81:1397-403. 2009
    ..Finally, we present experimental evidence that functionalized forms of amino acids tryptophan and tyrosine exhibit MEF when spin-coated onto aluminum nanostructures...
  9. pmc The C-terminal domain of the bacteriophage T4 terminase docks on the prohead portal clip region during DNA packaging
    Aparna Banerjee Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108N Greene St, Baltimore, MD 21201, USA
    Virology 446:293-302. 2013
    ..Such a terminase-portal orientation fits better to a proposed "DNA crunching" compression packaging motor and to portal determined DNA headful cutting. ..
  10. pmc Dynamics of the T4 bacteriophage DNA packasome motor: endonuclease VII resolvase release of arrested Y-DNA substrates
    Aparna Dixit
    Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201 1503, USA
    J Biol Chem 286:18878-89. 2011
    ....
  11. pmc Effect of plasmonic nanostructures and nanofilms on fluorescence resonance energy transfer
    Henryk Szmacinski
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
    J Biophotonics 2:243-52. 2009
    ..To a first approximation, observed changes in FRET efficiencies were explained by an increase of the quantum yield of the donor molecules in the presence of silver islands...
  12. pmc Plasmon-controlled fluorescence: a new paradigm in fluorescence spectroscopy
    Joseph R Lakowicz
    University of Maryland School of Medicine, Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, 725 W Lombard St, Baltimore, MD 21201, USA
    Analyst 133:1308-46. 2008
    ..Additionally, we summarize the recent work on metal-fluorophore interactions and suggest how these effects will result in new classes of experimental procedures, novel probes, bioassays and devices...
  13. pmc Distance-dependent metal-enhanced fluorescence from Langmuir-Blodgett monolayers of alkyl-NBD derivatives on silver island films
    Krishanu Ray
    Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    Langmuir 22:8374-8. 2006
    ..The present study provides significant information on the effect of fluorophore distance on the metal-enhanced fluorescence phenomenon...
  14. pmc Several hundred-fold enhanced fluorescence from single fluorophores assembled on silver nanoparticle-dielectric-metal substrate
    Krishanu Ray
    Centre for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, MD 21201, USA
    Chem Commun (Camb) 51:15023-6. 2015
    ..This substantial enhancement is due to the near-field enhanced excitation, emission, and interaction of Cy5 with plasmonic nanostructures. Experimental observation is supported by finite-element method calculations. ..
  15. pmc First observation of enhanced luminescence from single lanthanide chelates on silver nanorods
    Jian Zhang
    Centre for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, MD 21201, USA
    Chem Commun (Camb) 50:9383-6. 2014
    ..The enhancement factor was 280-fold, making single lanthanide luminescence detectable. This is also the first observation on single molecule detection (SMD) of a lanthanide dye. ..
  16. pmc Aluminum nanostructured films as substrates for enhanced fluorescence in the ultraviolet-blue spectral region
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
    Anal Chem 79:6480-7. 2007
    ....
  17. pmc Metal-enhanced fluorescence of tryptophan residues in proteins: application toward label-free bioassays
    Henryk Szmacinski
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, Baltimore, MD 21201, USA
    Anal Biochem 385:358-64. 2009
    ..The observed spectral effects of silver nanoparticles on tryptophan fluorescence indicates the possibility for the design of analytical tools for the detection of proteins without traditional labeling by extrinsic fluorophores...
  18. pmc Metal-enhanced fluorescence from CdTe nanocrystals: a single-molecule fluorescence study
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    J Am Chem Soc 128:8998-9. 2006
    ....
  19. ncbi request reprint Langmuir-Blodgett monolayers of long-chain NBD derivatives on silver island films: Well-organized probe layer for the metal-enhanced fluorescence studies
    Krishanu Ray
    Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    J Phys Chem B 110:13499-507. 2006
    ....
  20. pmc An improved cerulean fluorescent protein with enhanced brightness and reduced reversible photoswitching
    Michele L Markwardt
    Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
    PLoS ONE 6:e17896. 2011
    ..Thus, mCerulean3 is a bright, photostable cyan fluorescent protein which possesses several characteristics that are highly desirable for FRET experiments...
  21. pmc Silver Nanostructures for Fluorescence Correlation Spectroscopy: Reduced Volumes and Increased Signal Intensities
    Sharmistha Dutta Choudhury
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201, USA
    J Phys Chem Lett 3:2915-2919. 2012
    ..The ease of preparation of the AgNS substrates in comparison to previously investigated materials prepared by top-down nanofabrication is expected to make them readily available and suitable for various FCS applications...
  22. pmc Antigenic properties of the HIV envelope on virions in solution
    Krishanu Ray
    Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland, USA
    J Virol 88:1795-808. 2014
    ..However, the efficiency of virion-antibody interactions in solution inconsistently predicts neutralizing activity in vitro. ..
  23. ncbi request reprint Time-resolved fluorescence spectroscopic and scanning near-field optical microscopic studies of rhodamine dye adsorbed in cationic Langmuir-Blodgett films
    Krishanu Ray
    Department of Chemistry, Faculty of Science, Saitama University, Saitama 338 8570, Japan
    Spectrochim Acta A Mol Biomol Spectrosc 61:103-7. 2005
    ..This information is exploited to map the distribution with molecular spatial resolution. SNOM provide the visual evidence of the monomers and dimers of SRB in cationic LB films...
  24. ncbi request reprint Drosophila KAP interacts with the kinesin II motor subunit KLP64D to assemble chordotonal sensory cilia, but not sperm tails
    Ritu Sarpal
    Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
    Curr Biol 13:1687-96. 2003
    ..Kinesin associated protein (KAP) is identified as the non-motor accessory subunit of Kinesin II, but its role in the corresponding motor function is not understood...