Kohji Yamamoto

Summary

Affiliation: Kyushu University
Country: Japan

Publications

  1. doi New insights into the catalytic mechanism of Bombyx mori prostaglandin E synthase gained from structure-function analysis
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan Electronic address
    Biochem Biophys Res Commun 440:762-7. 2013
  2. doi Identification, characterization, and crystal structure of an aldo-keto reductase (AKR2E4) from the silkworm Bombyx mori
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan Electronic address
    Arch Biochem Biophys 538:156-63. 2013
  3. doi Structural basis for catalytic activity of a silkworm Delta-class glutathione transferase
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Biochim Biophys Acta 1820:1469-74. 2012
  4. doi Catalytic function of an ε-class glutathione S-transferase of the silkworm
    K Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, Fukuoka, Japan
    Insect Mol Biol 22:523-31. 2013
  5. doi Three-dimensional structure of a Bombyx mori Omega-class glutathione transferase
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Biochem Biophys Res Commun 438:588-93. 2013
  6. doi Crystal structure of a Bombyx mori sigma-class glutathione transferase exhibiting prostaglandin E synthase activity
    Kohji Yamamoto
    Kyushu University Graduate School, Fukuoka, Japan
    Biochim Biophys Acta 1830:3711-8. 2013
  7. pmc Identification and expression analysis of minichromosome maintenance proteins in the silkworm, Bombyx mori
    Kohji Yamamoto
    Laboratories of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    J Insect Sci 10:148. 2010
  8. ncbi Expression and characterization of a sigma-class glutathione S-transferase of the fall webworm, Hyphantria cunea
    Kohji Yamamoto
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University Graduate School, Fukuoka, Japan
    Biosci Biotechnol Biochem 71:553-60. 2007
  9. ncbi Molecular and biochemical characterization of manganese-containing superoxide dismutase from the silkworm, Bombyx mori
    Kohji Yamamoto
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812 8581, Japan
    Comp Biochem Physiol B Biochem Mol Biol 142:403-9. 2005
  10. doi Molecular characterization of an insecticide-induced novel glutathione transferase in silkworm
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, Higashi ku, Fukuoka, Japan
    Biochim Biophys Acta 1810:420-6. 2011

Collaborators

Detail Information

Publications36

  1. doi New insights into the catalytic mechanism of Bombyx mori prostaglandin E synthase gained from structure-function analysis
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan Electronic address
    Biochem Biophys Res Commun 440:762-7. 2013
    ..These results are, to our knowledge, the first to reveal the presence of an electron-sharing network in bmPGES...
  2. doi Identification, characterization, and crystal structure of an aldo-keto reductase (AKR2E4) from the silkworm Bombyx mori
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan Electronic address
    Arch Biochem Biophys 538:156-63. 2013
    ..This structure constitutes the first insect AKR structure determined. Bound NADPH is located at the center of the TIM- or (β/α)8-barrel, and residues involved in catalysis are conserved...
  3. doi Structural basis for catalytic activity of a silkworm Delta-class glutathione transferase
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Biochim Biophys Acta 1820:1469-74. 2012
    ..Here, we determined the crystal structure of a Delta-class GST from Bombyx mori (bmGSTD) to examine its catalytic residues...
  4. doi Catalytic function of an ε-class glutathione S-transferase of the silkworm
    K Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, Fukuoka, Japan
    Insect Mol Biol 22:523-31. 2013
    ..These residues were replaced with alanine by site-directed mutagenesis and subsequent kinetic analysis of bmGSTE mutants indicated that His53, Val55, and Ser68 were important for enzyme function. ..
  5. doi Three-dimensional structure of a Bombyx mori Omega-class glutathione transferase
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Biochem Biophys Res Commun 438:588-93. 2013
    ..Site-directed mutagenesis of bmGSTO mutants indicated that amino acid residues Leu62, Lys65, Lys77, Val78, Glu91 and Ser92 in the G-site contribute to catalytic activity. ..
  6. doi Crystal structure of a Bombyx mori sigma-class glutathione transferase exhibiting prostaglandin E synthase activity
    Kohji Yamamoto
    Kyushu University Graduate School, Fukuoka, Japan
    Biochim Biophys Acta 1830:3711-8. 2013
    ..Glutathione transferases (GSTs) are members of a major family of detoxification enzymes. Here, we report the crystal structure of a sigma-class GST of Bombyx mori, bmGSTS1, to gain insight into the mechanism catalysis...
  7. pmc Identification and expression analysis of minichromosome maintenance proteins in the silkworm, Bombyx mori
    Kohji Yamamoto
    Laboratories of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    J Insect Sci 10:148. 2010
    ..Expression plasmids were transformed into competent Escherichia coli and overexpressed. This is the first report on the identification of MCM helicase of the silkworm, B. mori...
  8. ncbi Expression and characterization of a sigma-class glutathione S-transferase of the fall webworm, Hyphantria cunea
    Kohji Yamamoto
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University Graduate School, Fukuoka, Japan
    Biosci Biotechnol Biochem 71:553-60. 2007
    ..We also found that as compared to B. mori Sigma-class GST, rhcGST had a higher affinity for fenitrothion, an organophosphorus insecticide...
  9. ncbi Molecular and biochemical characterization of manganese-containing superoxide dismutase from the silkworm, Bombyx mori
    Kohji Yamamoto
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812 8581, Japan
    Comp Biochem Physiol B Biochem Mol Biol 142:403-9. 2005
    ..Its activity was never affected by incubation at pH 7 for 30 min below 50 degrees C...
  10. doi Molecular characterization of an insecticide-induced novel glutathione transferase in silkworm
    Kohji Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, Higashi ku, Fukuoka, Japan
    Biochim Biophys Acta 1810:420-6. 2011
    ..We have identified a GST mRNA that was induced in the fat bodies of a silkworm strain exhibiting diazinon resistance and have investigated the enzyme properties of this GST...
  11. pmc Facilitation of dissociation reaction of nucleotides bound to Mycobacterium tuberculosis DnaA
    Kohji Yamamoto
    Graduate School of Bioresource and Bioenvironmental Science, Kyushu University, Fukuoka 812 8581, Japan
    J Biochem 143:759-64. 2008
    ..We suggest that the outcome of intra-cellular DnaA(TB)-nucleotide interactions, hence DnaA(TB) activity, is influenced by phospholipids...
  12. ncbi Cloning, expression and characterization of theta-class glutathione S-transferase from the silkworm, Bombyx mori
    Kohji Yamamoto
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, 6 10 1 Hakozaki, Higashi ku, Fukuoka, Fukuoka 812 8581, Japan
    Comp Biochem Physiol B Biochem Mol Biol 141:340-6. 2005
    ..Incubation for 30 min at temperatures below 50 degrees C also affected the activity insignificantly. The Michaelis constant for 1-chloro-2,4-dinitrobenzene was 0.48 mM...
  13. ncbi Superoxide dismutase from the silkworm, Bombyx mori: sequence, distribution, and overexpression
    Kohji Yamamoto
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
    Biosci Biotechnol Biochem 69:507-14. 2005
    ..bmSOD at 4 degrees C retained almost all of its original activity after incubation at pH 4-11 for 24 h. Incubation (pH 7) for 30 min at temperatures below 40 degrees C also affected activity insignificantly...
  14. ncbi Catalase from the silkworm, Bombyx mori: gene sequence, distribution, and overexpression
    Kohji Yamamoto
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, 6 10 1 Hakozaki, Higashi ku, Fukuoka, Fukuoka 812 8581, Japan
    Insect Biochem Mol Biol 35:277-83. 2005
    ..The Michaelis constant for hydrogen peroxide was evaluated to be 28 mM at pH 6.5 and 30 degrees C. rCAT was suggested to be a member of the typical catalase family...
  15. doi Biochemical properties of an omega-class glutathione S-transferase of the silkmoth, Bombyx mori
    Kohji Yamamoto
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University Graduate School, Higashi ku, Fukuoka 812 8581, Japan
    Comp Biochem Physiol C Toxicol Pharmacol 149:461-7. 2009
    ..These results indicate that bmGSTO could be involved in the increase in level of insecticide resistance for lepidopteran insects...
  16. doi Characterization of an omega-class glutathione S-transferase in the stress response of the silkmoth
    K Yamamoto
    Faculty of Agriculture, Kyushu University Graduate School, Higashi ku, Fukuoka, Japan
    Insect Mol Biol 20:379-86. 2011
    ..Thus, bmGSTO could contribute to increasing the environmental stress resistance of lepidopteran insects...
  17. ncbi Proteome analysis of silk gland proteins from the silkworm, Bombyx mori
    Pingbo Zhang
    Faculty of Agriculture, Institute of Genetic Resources, Kyushu University, Fukuoka, Japan
    Proteomics 6:2586-99. 2006
    ..The current analysis contributes to our understanding of proteins expressed by the silk gland not only of the model lepidopteran B. mori, but also to proteins from other silk-producing insects such as Philosamia cynthia ricini...
  18. ncbi Proteomic studies of lipopolysaccharide-induced polypeptides in the silkworm, Bombyx mori
    Yongqiang Wang
    Laboratories of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812 8581, Japan
    Biosci Biotechnol Biochem 68:1821-3. 2004
    ..H2 and H3 were novel polypeptides. H4 was estimated to be attacin antibacterial polypeptide with high coverage of sequence. The amounts of all the induced polypeptides decreased at 48 h after the injection...
  19. ncbi Utility of dry gel from two-dimensional electrophoresis for peptide mass fingerprinting analysis of silkworm proteins
    Pingbo Zhang
    Laboratory of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812 8581, Japan
    Biosci Biotechnol Biochem 68:2148-54. 2004
    ..Based on these results, we confirmed the utility of dry electrophoretic gels for proteomics of insect extracts...
  20. ncbi Proteomic profiling of the silkworm skeletal muscle proteins during larval-pupal metamorphosis
    Pingbo Zhang
    Institute of Genetic Resources, Kyushu University, Fukuoka 812 8581, Japan
    J Proteome Res 6:2295-303. 2007
    ..Three pupa-defective proteins were identified as isoforms of troponin I, followed by an immunoblotting validation. This data will be helpful in understanding the biochemistry of an insect ISM...
  21. ncbi Overexpression in Escherichia coli and purification of recombinant CI-b1, a Kunitz-type chymotrypsin inhibitor of silkworm
    Ningjia He
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, 6 10 1, Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Protein Expr Purif 38:9-16. 2004
    ..Recombinant CI-b1 immobilized on Ni-NTA resin was used to detect the interactions occurring between the CI-b1 and its target factors...
  22. ncbi Silkworm midgut proteins interacting with a hemolymph protease inhibitor, CI-8
    Yoshinori Ueno
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812 8581, Japan
    Biosci Biotechnol Biochem 70:1557-63. 2006
    ..The antibody also neutralized the CI-8 binding ability of p29 in the midgut membrane. p29 and p60 are perhaps proteinaceous factors involved in the uptake of CI-8 into the midgut through the membrane...
  23. ncbi In vivo and in vitro interactions of the Bombyx mori chymotrypsin inhibitor b1 with Escherichia coli
    Ningjia He
    Laboratories of Insect Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
    Biosci Biotechnol Biochem 68:835-40. 2004
    ..coli but never worked lethally. CI-b1 is speculated to be a mediator that scavenges intruding bacteria rather than a direct anti-bacterial factor. This is the first report confirming that CI-b1 is a lipopolysaccharide binding protein...
  24. doi Crystallographic survey of active sites of an unclassified glutathione transferase from Bombyx mori
    Yoshimitsu Kakuta
    Faculty of Agriculture, Kyushu University Graduate School, 6 10 1 Hakozaki, Higashi ku, Fukuoka 812 8581, Japan
    Biochim Biophys Acta 1810:1355-60. 2011
    ..Here, we sought to further characterize this GST, bmGSTu, by solving and refining its crystal structure and identifying its catalytic residues...
  25. ncbi Genomic structure and expression analysis of the gene encoding a silkworm basic Kunitz-type chymotrypsin inhibitor
    Ningjia He
    Institute of Insect Genetic Resources, Graduate School of Bioresource and Bioenvironmental Science, Kyushu University, 6 10 1, Hakozaki, Fukuoka 812 8581, Higashi, Japan
    Biochim Biophys Acta 1628:71-7. 2003
    ..According to our data, we discussed the transcriptional factors putatively responsible for the physiological role of CIb1 in the silkworm hemolymph...
  26. ncbi Genes encoding small heat shock proteins of the silkworm, Bombyx mori
    Daisuke Sakano
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Japan
    Biosci Biotechnol Biochem 70:2443-50. 2006
    ..Heat shock triggered a substantial increase in the transcripts other than shsp21.4. The B. mori sHSPs are perhaps classified into at least two groups: sHSP21.4 and others...
  27. ncbi Salt-induced changes in the subunit structure of the Bacillus stearothermophilus lipoate acetyltransferase
    Yuichi Shigeoka
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University
    Biosci Biotechnol Biochem 77:1637-44. 2013
    ..PDC, in which PSBD is occupied by other components, and a truncated E2 undergo dissociation only. LD-PSBD region besides CD might then contribute to the partial association of dissociated E2...
  28. ncbi Structural properties of silkworm small heat-shock proteins: sHSP19.9 and sHSP20.8
    Tofazzal Hossain
    Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
    Biosci Biotechnol Biochem 74:1556-63. 2010
    ..sHSP20.8 and sHSP19.9 with dithiothreitol were stable against lyophilization, autoclaving at 120 degrees C, and boiling...
  29. ncbi Proteomic studies of isoforms of the P25 component of Bombyx mori fibroin
    Pingbo Zhang
    Institute of Genetic Resources, Kyushu University, Fukuoka, Japan
    Biosci Biotechnol Biochem 69:2086-93. 2005
    ..mandarina. It is suggested that this diversity of P25 isoforms depends on phosphorylation modification in addition to glycosylation...
  30. pmc Modulation of Mycobacterium tuberculosis DnaA protein-adenine-nucleotide interactions by acidic phospholipids
    Kohji Yamamoto
    Biomedical Research, The University of Texas Health Center at Tyler, 11937 U S Hwy 271, Tyler, TX 75708 3154, U S A
    Biochem J 363:305-11. 2002
    ..tuberculosis oriC involves intimate interactions between DnaA, adenine nucleotides and membrane phospholipids, and the latter helps to ensure that only the ATP form of the DnaA protein interacts continuously with oriC...
  31. ncbi Phospholipids promote dissociation of ADP from the Mycobacterium avium DnaA protein
    Kohji Yamamoto
    Department of Biochemistry, The University of Texas Health Center at Tyler, Tyler, TX 75703 3154, USA
    J Biochem 131:219-24. 2002
    ..avium origin of replication. We suggest that the initiation of DNA replication in M. avium involves an interplay among DnaA, adenine nucleotides and phospholipids...
  32. ncbi The intrinsic ATPase activity of Mycobacterium tuberculosis DnaA promotes rapid oligomerization of DnaA on oriC
    Murty V V S Madiraju
    Biomedical Research, The University of Texas Health Center at Tyler, 75708 3154, USA
    Mol Microbiol 59:1876-90. 2006
    ..We propose that ATPase activity enables the DnaA protomers on oriC to rapidly form oligomeric complexes competent for replication initiation...
  33. pmc Terahertz time-domain spectroscopy of amino acids and polypeptides
    Kohji Yamamoto
    Molecular Photoscience Research Center, and Graduate School of Science and Technology, Kobe University, Nada, Kobe 657 8501, Japan
    Biophys J 89:L22-4. 2005
    ..The exponents are different between the monomers and polymers, and those of the two polypeptides suggest that the time dependences of the total dipole moments are similar in the timescale of subpico- to picoseconds...
  34. ncbi [Studies on dynamics of protein folding/unfolding by using the laser-induced temperature jump technique]
    Yasuhisa Mizutani
    Tanpakushitsu Kakusan Koso 47:670-6. 2002
  35. ncbi A case study on the effect of storage of advanced treated water in a building's plumbing system on trihalomethane levels
    Kohji Yamamoto
    Osaka City Institute of Public Health and Environmental Sciences, 8 34, Tojo cho, Tennoji ku, Osaka 543 0026, Japan
    Bull Environ Contam Toxicol 79:665-9. 2007
    ..Annual changes in THM in the stored water were also examined. Increasing air temperature increased THMs levels except for bromoform...
  36. ncbi Integration of molecular and classical linkage groups of the silkworm, Bombyx mori (n = 28)
    Yuji Yasukochi
    Insect Genome Laboratory, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan
    Genome 48:626-9. 2005
    ..As a result, the counterparts for 26 of 28 molecular LGs were identified with their counterparts of the classical LGs. Two visible markers, Sel and Xan, representing different classical LGs, were found to be linked...