Authors: Juri Kim SungSu Bae MoonHee Sung KyuHo Lee SoonJung Park
Publish Date: 2008/10/14
Volume: 104, Issue: 2, Pages: 475-
Abstract
The proteome of Giardia lamblia at its cyst stage was compared with that of trophozoites by using twodimensional SDSPAGE gel electrophoresis Protein spots that increased in the extracts of cysts compared to trophozoites were identified by MALDITOF mass spectroscopy and categorized as cytoskeletal proteins metabolic enzymes a cellcyclespecific kinase stress resistance proteins and a protein involved in translation Expression patterns of five of the identified proteins were examined during encystation by realtime PCR Expression of cwp1 encoding cyst wall protein 1 a marker for encystation was increased 11fold In contrast tim encoding triose1phosphate isomerase was expressed constitutively during encystation and its transcription level was therefore used as a mRNA loading control Expression of three genes encoding βtubulin vacuolar ATPase and neverinmitosisArelated protein kinase did not vary significantly during encystation Interestingly genes encoding two heat shock proteins Hsp70 and Hsp90 showed increased expression during encystation suggesting that this differentiation process accompanies a cellular response to stress in G lamblia
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