K. Samejima

Publications106
h-index22
Citations1,442
Highly Influential Citations20
Claim Author Page
Author pages are created from data sourced from our academic publisher partnerships and public sources.

Recommended Authors

  • A. Pegg
  • 687 Publications, 35,582 Citations
  • K. Hamana
  • 165 Publications, 3,109 Citations
  • S. Matsuzaki
  • 148 Publications, 2,089 Citations
  • M. Niitsu
  • 119 Publications, 1,990 Citations
  • Publications
  • Influence
Effects of inhibitors of spermidine synthase and spermine synthase on polyamine synthesis in rat tissues.
Several inhibitors of aminopropyltransferases, developed recently in this laboratory, were tested for their specificity by measuring their effects on six enzyme activities related to polyamine… Expand
  • 53
  • 3
Regulation of both apoptosis and cell survival by the v-Src oncoprotein
A number of oncogenes alter the regulation of the cell cycle and cell death, contributing to the altered growth of tumours. Expression of the v-Src oncoprotein in Rat-1 fibroblasts prevented cell… Expand
  • 74
  • 3
N1-Aminopropylagmatine, a New Polyamine Produced as a Key Intermediate in Polyamine Biosynthesis of an Extreme Thermophile, Thermus thermophilus *
In the extreme thermophile Thermus thermophilus, a disruption mutant of a gene homologous to speB (coding for agmatinase = agmatine ureohydrolase) accumulated N1-aminopropylagmatine… Expand
  • 48
  • 2
Quantification of intermediates of the methionine and polyamine metabolism by liquid chromatography-tandem mass spectrometry in cultured tumor cells and liver biopsies.
By means of liquid chromatography-tandem mass spectrometry we showed recently, that the chromosomal deletion or inactivation of the methylthioadenosine phosphorylase (MTAP) gene led to the… Expand
  • 42
  • 2
Polyamine synthesis in mammalian tissues. Isolation and characterization of spermidine synthase from bovine brain.
Spermidine synthase (EC 2.5.1.16) was purified to apparent homogeneity (about 11 000-fold) from bovine brain by affinity chromatography, with S-adenosyl-(5')-3-thiopropylamine linked to Sepharose as… Expand
  • 41
  • 1
Detection of spermine and thermospermine by thin-layer chromatography
  • 21
  • 1
Crystal structures and enzymatic properties of a triamine/agmatine aminopropyltransferase from Thermus thermophilus.
To maintain functional conformations of DNA and RNA in high-temperature environments, an extremely thermophilic bacterium, Thermus thermophilus, employs a unique polyamine biosynthetic pathway and… Expand
  • 19
  • 1
Occurrence of tertiary and quaternary branched polyamines in thermophilic archaebacteria.
Polyamines of thermophilic archaebacteria were analysed by high-performance liquid chromatography and gas chromatography. Thermoplasma acidophilum and Thermoplasma volcanium ubiquitously contained… Expand
  • 24
  • 1
Increase of N1,N12-diacetylspermine in tissues from colorectal cancer and its liver metastasis
PurposeN1,N12-Diacetylspermine (DiAcSpm) is a tumor marker featured by increase in the urine of patients with cancers, including early colorectal cancer, but where and how DiAcSpm is made remains… Expand
  • 16
  • 1
Mammalian spermidine synthase--identification of cysteine residues and investigation of the putrescine binding site--.
Homology modeling and inhibitory studies using substrate analogs were undertaken to construct a possible three-dimensional structure, including the putrescine-binding site, of rat spermidine synthase… Expand
  • 13
  • 1