Abstract
Two forms of xyloglucan endotransglycosylase differing in isoelectric points were isolated from the protein mixture obtained from parsley roots and partially characterized. Both forms were glycoproteins differing in their specific activities but other features were almost the same. Activity and stability of both enzymes in broad pH region were observed with two pH optima, one at acidic pH (5.8) and the second one at basic pH (8.8). The enzymes behaved as typical transglycosylases since no activity was observed in the absence of xyloglucan oligosaccharides in the viscometric assay. Small hetero-transglycosylating activities were observed when hydroxyethyl-or carboxymethyl-celluloses instead of xyloglucan as donor substrate were used as well as when cello-oligosaccharides instead of xyloglucan oligosaccharides were used as the acceptor substrate.
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Abbreviations
- CMC:
-
Na-carboxymethylcellulose
- HEC:
-
hydroxyethylcellulose
- IEF:
-
isoelectric focusing
- LAOs:
-
laminari-oligosaccharides
- SR:
-
sulforhodamine
- XEH:
-
xyloglucan endohydrolase
- XET:
-
xyloglucan endotransglycosylase
- XG:
-
xyloglucan
- XGOs:
-
XG-derived oligosaccharides
- XTH:
-
xyloglucan endotransglycosylase/hydrolase
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Garajová, S., Flodrová, D., Ait-Mohand, F. et al. Characterization of two partially purified xyloglucan endotransglycosylases from parsley (Petroselinum crispum) roots. Biologia 63, 313–319 (2008). https://doi.org/10.2478/s11756-008-0067-2
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DOI: https://doi.org/10.2478/s11756-008-0067-2