Masayuki Masuko

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Alternative oxidase (AOX) is dramatically induced when the fungus Magnaporthe grisea is incubated with the fungicide SSF-126, which interacts with the cytochrome bc1 complex in the electron transport system of mitochondria. A full-length cDNA for the alternative oxidase gene (AOX) was obtained, and the deduced amino acid sequence revealed marked similarity(More)
The regulation of human cytomegalovirus (hCMV) and human immunodeficiency virus (HIV) gene expression has been studied in single intact mammalian cells. Viral promoters were placed upstream of the firefly luciferase reporter gene and the resulting hybrid reporter constructs were stably integrated into the HeLa cell genome. A highly sensitive photon-counting(More)
We characterized the fluorescence resonance energy transfer (FRET) from pyrene (donor) to perylene (acceptor) for nucleic acid assays under homogeneous solution conditions. We used the hybridization between a target 32 mer and its complementary two sequential 16 mer deoxyribonucleotides whose neighboring terminals were each respectively labeled with a(More)
A previously presented homogeneous assay method, named the excimer-forming two-probe nucleic acid hybridization (ETPH) method, is based on specific excimer formation between two pyrenes attached at the neighboring terminals of two sequential probe oligonucleotides complementary to a single target. In this study, we investigated assay conditions and optimal(More)
We developed a novel nucleic acid hybridization method based on excimer formation. We used two different 16-mer oligonucleotide probes that had a combined continuous-sequence run that was complementary to a target 32-mer. Prior to hybridization, the adjacent terminal ends (i.e. the 3'-terminal of one probe and the 5'-terminal of the other probe) were each(More)
A 16mer sequence of peptide nucleic acid (PNA) was immobilized onto the surface of silica glass to supply solid supports for DNA chip and biosensor constructions. To the surface, 3-aminopropyltriethoxysilane (APTES), succinimidyl-4-(N-maleimidomethyl)cyclohexane-1-carboxy-(6-amidocaproate) (LC-SMCC), and cysteinyl-PNA were introduced in order. Hybridization(More)
The reactions of nitrogen monoxide (NO) with the blue copper-containing nitrite reductases from Alcaligenes sp. NCIB 11015 and Achromobacter cycloclastes IAM 1013 were investigated spectroscopically. The electron paramagnetic resonance (EPR) signals of the blue coppers vanished in the presence of NO at 77 K, being fully restored by the removal of NO. The(More)
A copper-containing dissimilatory nitrite reductase [nitric-oxide: ferricytochrome c oxidoreductase, EC] was purified from a denitrifier, Alcaligenes sp. NCIB 11015, by ion-exchange chromatography on CM-cellulose, gel filtration on Sephadex G-150, and adsorption on hydroxyapatite. The preparation was homogeneous by SDS-polyacrylamide gel(More)
Pyrene excimer formation was achieved in an aqueous solution by nucleic acid hybridization. We used two different 16-mer oligonucleotide probes which had a combined continuous-sequence run complimentary to a target 32-mer. Prior to hybridization, the adjacent terminal ends (i.e., the 3'-terminal of one probe and the 5'-terminal of the other probe) were each(More)
A general high-performance gel-permeation chromatography (HPGPC) method was developed to determine protein in human serum with improved sensitivity and speed. The optimum UV wavelength for protein detection was found to be 210 nm, by comparing the protein values obtained by varying the UV wavelength of the HPLC detection system with the protein values(More)