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פותח על ידי קלירמאש פתרונות בע"מ -
Role of tomato hexose kinases
Year:
2007
Source of publication :
Functional Plant Biology
Authors :
גרנות, דוד
;
.
Volume :
34
Co-Authors:
Granot, D., Institute of Plant Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
564
To page:
570
(
Total pages:
7
)
Abstract:
Hexose phosphorylation is an essential step of sugar metabolism. Only two classes of glucose and fructose phosphorylating enzymes, hexokinases (HXK) and fructokinases (FRK), have been found in plants. Tomato (Lycopersicon esculentum Mill.) is the only plant species from which four HXK and four FRK genes have been identified and characterised. One HXK and one FRK isozyme are located within plastids. The other three HXK isozymes are associated with the mitochondria, and the other three FRK isozymes are dispersed in the cytosol. These differences in location suggest that the cytoplasmic HXK and FRK have distinct roles to play in sugar metabolism. The specific roles of each of the HXK and FRK genes have been investigated using transgenic plants with modified expression of the genes. Sugar signalling effects were obtained with modified expression of the mitochondria associated HXK. In contrast, modified expression of the cytosolic FRK affected fructose metabolism rather than sugar signalling. Future research efforts will aim to determining the roles of specific hexose phosphorylating enzymes in tomato plants, the source of the hexose monomers to be phosphorylated, and their intracellular trafficking route. © CSIRO 2007.
Note:
Related Files :
enzyme activity
enzymes
Fructokinase
Genes
Hexose phosphorylation
Intracellular localisation
metabolism
sugar
עוד תגיות
תוכן קשור
More details
DOI :
10.1071/FP06207
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
31461
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:02
Scientific Publication
Role of tomato hexose kinases
34
Granot, D., Institute of Plant Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Role of tomato hexose kinases
Hexose phosphorylation is an essential step of sugar metabolism. Only two classes of glucose and fructose phosphorylating enzymes, hexokinases (HXK) and fructokinases (FRK), have been found in plants. Tomato (Lycopersicon esculentum Mill.) is the only plant species from which four HXK and four FRK genes have been identified and characterised. One HXK and one FRK isozyme are located within plastids. The other three HXK isozymes are associated with the mitochondria, and the other three FRK isozymes are dispersed in the cytosol. These differences in location suggest that the cytoplasmic HXK and FRK have distinct roles to play in sugar metabolism. The specific roles of each of the HXK and FRK genes have been investigated using transgenic plants with modified expression of the genes. Sugar signalling effects were obtained with modified expression of the mitochondria associated HXK. In contrast, modified expression of the cytosolic FRK affected fructose metabolism rather than sugar signalling. Future research efforts will aim to determining the roles of specific hexose phosphorylating enzymes in tomato plants, the source of the hexose monomers to be phosphorylated, and their intracellular trafficking route. © CSIRO 2007.
Scientific Publication
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