Words similar to polyamine
Example sentences for: polyamine
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The availability of the crystal structure for the polyamine oxidase from maize allowed us to evaluate the sequence conservation of the oxidoreductase domain fused to the SWIRM domains [ 45, 46].
The 26S proteasome is responsible for the bulk turnover of cytoplasmic and nuclear proteins in eukaryotic cells and also plays a key role in the regulation of cell cycle, signal transduction, transcription as well as antigen presentation [ 17 18 19 20 21 ] . Most of the known proteasomal substrates are marked and targeted to proteasome by ubiquitination [ 17 19 20 ] . Ubiquitination, however, is not an obligatory step for substrate targeting to proteasome [ 17 18 20 ] . The degradation of the ornithine decarboxylase (ODC), the rate-limiting enzyme for polyamine synthesis, involves a protein named antizyme (Az), which binds and targets ODC to 26S proteasome for degradation [ 18 ] . However, ODC has remained an "orphan" in Az-dependent proteasomal degradation.
The transcript encoding ornithine decar-boxylase (ODC), a known androgen target that catalyzes the rate-limiting step in polyamine biosynthesis [ 26], was induced coordinately with enzymes that catalyze downstream steps in polyamine synthetic pathway (spermine synthase, spermidine/spermine N 1-acetyltransferase, and S-adenosylmethionine decarboxylase) (Figure 5c).
Primary cultures were prepared from hind limbs of day 18 embryos (E18) as described previously [ 23 ] . cDNAs of interest and a separate expression vector encoding the T-cell membrane antigen CD8 were subcloned into the mammalian expression vector pSG5 (Stratagene, CA) and were mixed and cotransfected with the polyamine LT-1 (Panvera, WI).
GSPS is a bifunctional enzyme: its synthase domain carries out the ATP-dependent fusion of two glutathione moieties to the polyamine spermidine to form the antioxidant metabolite GSP, while its amidase domain hydrolyzes the amide linkage to release glutathione and spermidine [ 26, 55, 56].
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