Parasitiology
G. lamblia encystation dependent on novel transglutaminase activity
Published in TB and Outbreaks Week, September 21st, 2004
"Earlier, we found that three protein disulfide isomerases (PDI) from Giardia lamblia (gPDI) also have transglutaminase (TGase) activity in vitro. We now show that differentiating Giardia cells contain isopeptide bonds (epsilon(gamma-glutamyl)lysine), the biological product of TGase activity that results in irreversible crosslinking of proteins in vivo," scientists in the United States report.
"HPLC analyses showed the highest isopeptide bond content in cells encysting for 21 hours, indicating an important role for TGase early in encystations. We were not...
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