EC Number   |
General Information |
Reference |
|---|
   2.4.1.14 | evolution |
a comparison of the sequences of the wheat SPSII orthologues present in the diploid progenitors Triticum monococcum, Triticum urartu, Triticum speltoides, Aegilops tauschii, and Triticum speltoides, as well as in the more distantly related species Hordeum vulgare, Oryza sativa, Sorghum and purple false brome, Brachypodium distachyon, demonstrates that intronic sequence is less well conserved than exonic. Comparative sequence and phylogenetic analysis of SPSII gene shows that false purple brome is more similar to Triticeae than to Oryza sativa |
719182 |
| 2.4.1.14 | malfunction |
an spsa1 knock-out mutant shows a 44% decrease in leaf enzyme activity compared to the wild-type and a slight increase in leaf starch content at the end of the light period as well as at the end of the dark period. An spsa1/spsc double mutant is strongly impaired in growth and accumulated high levels of starch. This increase in starch is probably not due to an increased partitioning of carbon into starch, but is rather caused by an impaired starch mobilization during the night. Sucrose export from excised petioles harvested from spsa1/spsc double mutant plants is significantly reduced under illumination as well as during the dark period. Loss of the two major SPS isoforms in leaves limits Suc synthesis without grossly changingcarbon partitioning in favour of starch during the light period but limits starch degradation during the dark period |
736569 |
| 2.4.1.14 | physiological function |
enzyme overexpression has both direct and indirect effects on sugar concentration and soluble acid invertase activity in sugarcane. In addition, enzyme overexpression results in a significant increase in plant height and stalk number in some transgenic lines compared to those in non-transgenic control |
758099 |
| 2.4.1.14 | more |
expression of all the SPS genes, particularly that of SPS1 and SPS11, tends to be higher at night when the activation state of the SPS proteins is low, and the mRNA levels of SPS1 and SPS6 are negatively correlated with sucrose content. The temporal patterns of SPS gene expression and sugar content under continuous light conditions suggest the involvement of endogenous rhythm and/or sucrose sensing in the transcriptional regulation of SPS genes, overview |
720763 |
| 2.4.1.14 | more |
gene expression analysis of sucrose biosynthesis genes during wheat plant ontogeny, overview |
719182 |
| 2.4.1.14 | physiological function |
isoform SPSA participates in a regulatory cycle in which sucrose is simultaneously degraded and re-synthesized. This function contributes to plant growth in rhizobia nodulated alfalfa plants |
758096 |
| 2.4.1.14 | physiological function |
isoform SPSB is responsible for the synthesis of sucrose in the photosynthetic cells. This function contributes to plant growth in rhizobia nodulated alfalfa plants |
758096 |
| 2.4.1.14 | malfunction |
knockdown and knockout mutants of isoform SPS1 show a 29-46% reduction in enzyme activity in the leaves, but the carbohydrate content in the leaves and plant growth are not significantly different from those of wild type plants. In a double knockout mutant of SPS1 and SPS11, an 84% reduction in leaf enzyme activity results in higher starch accumulation in the leaves than in the wild type leaves. However, the double knockout mutant plants grow normally |
758076 |
| 2.4.1.14 | physiological function |
molecular mechanism of transcriptional regulation of banana sucrose phosphate synthase gene during fruit ripening by functions of various cis-acting regulatory elements, overview. Presence of specific trans-acting factors which showed specific interactions with ethylene, auxin, low temperature and light responsive elements in regulating SPS transcription |
720767 |
| 2.4.1.14 | more |
most of the potato cultivars are autotetraploid (2n = 4x = 48), highly heterozygous, and show high level of DNA polymorphism in its genome. Natural allelic variations are also common in potato genes |
735412 |
