期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 168, 期 9, 页码 983-989出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.jplph.2010.11.003
关键词
Saccharum; Sucrose accumulation; Sugarcane; Vacuolar invertase; Vacuole targeting
资金
- Cooperative Research Centre for Sugar Industry Innovation through Biotechnology
Enzyme activities in the vacuole have an important impact on the net concentration of sucrose. In sugarcane (Saccharum hybrid), immunolabelling demonstrated that a soluble acid invertase (beta-fructofuranosidase; EC 3.2.1.26) is present in the vacuole of storage parenchyma cells during sucrose accumulation. Examination of sequences from sugarcane, barley and rice showed that the N-terminus of the invertase sequence contains a signal anchor and a tyrosine motif, characteristic of single-pass membrane proteins destined for lysosomal compartments. The N-terminal peptide from the barley invertase was shown to be capable of directing the green fluorescent protein to the vacuole in sugarcane cells. The results suggest that soluble acid invertase is sorted to the vacuole in a membrane-bound form. (C) 2010 Elsevier GmbH. All rights reserved.
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