Abstract

Troponin complex (troponin T (TnT), troponin I (TnI), troponin C (TnC)) plays an important role in the Ca2+ -dependent regulation of muscle contraction. To study the proximity relationships of the troponin T-I-C subunits, a series of additional mutation of TnT and 25 K fragment of TnT have been made, expressed in E.coli and purified. The single-Tap mutant K fragment of TnT (TnT/25 K W265F) was needed as the donor for distance measurements by fluorescence energy transfer. Series of donor-acceptor pairs were chosen and the spectroscopic properties measured under different buffer conditions. The distances between Tap-212 of TnT/K to Tin-Cys-96 (N96C), Tin-Cys-117 (S117C), TnC-Met-25 and TnC-Cys-98 were measured. The distance measurements are being used to develop models for muscle contraction.?

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR008119-07
Application #
6122889
Study Section
Project Start
1999-04-01
Project End
2000-03-31
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
7
Fiscal Year
1999
Total Cost
Indirect Cost

  Institution

Name
University of Maryland Baltimore
Department
Type
DUNS #
003255213
City
Baltimore
State
MD
Country
United States
Zip Code
21201

  Publications

Piao, Wenji; Shirey, Kari Ann; Ru, Lisa W et al. (2015) A Decoy Peptide that Disrupts TIRAP Recruitment to TLRs Is Protective in a Murine Model of Influenza. Cell Rep 11:1941-52
Hartman, Kira G; McKnight, Laura E; Liriano, Melissa A et al. (2013) The evolution of S100B inhibitors for the treatment of malignant melanoma. Future Med Chem 5:97-109
Fu, Yi; Zhang, Jian; Lakowicz, Joseph R (2009) Highly efficient detection of single fluorophores in blood serum samples with high autofluorescence. Photochem Photobiol 85:646-51
Zhang, Jian; Badugu, Ramachandram; Lakowicz, Joseph R (2008) Fluorescence Quenching of CdTe Nanocrystals by Bound Gold Nanoparticles in Aqueous Solution. Plasmonics 3:3-11
Zhang, Jian; Fu, Yi; Lakowicz, Joseph R (2007) Single cell fluorescence imaging using metal plasmon-coupled probe. Bioconjug Chem 18:800-5
Zhang, Jian; Fu, Yi; Lakowicz, Joseph R (2007) Emission Behavior of Fluorescently Labeled Silver Nanoshell: Enhanced Self-Quenching by Metal Nanostructure. J Phys Chem C Nanomater Interfaces 111:1955-1961
Zhang, Jian; Lakowicz, Joseph R (2007) Metal-enhanced fluorescence of an organic fluorophore using gold particles. Opt Express 15:2598-606
Fu, Yi; Lakowicz, Joseph R (2007) Single-Molecule Studies of Enhanced Fluorescence on Silver Island Films. Plasmonics 2:1-4
Ray, Krishanu; Szmacinski, Henryk; Enderlein, Joerg et al. (2007) Distance dependence of surface plasmon-coupled emission observed using Langmuir-Blodgett films. Appl Phys Lett 90:251116
Chowdhury, Mustafa H; Malyn, Stuart N; Aslan, Kadir et al. (2007) First Observation of Surface Plasmon-Coupled Chemiluminescence (SPCC). Chem Phys Lett 435:114-118

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