2.4.1.14: sucrose-phosphate synthase
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For detailed information about sucrose-phosphate synthase, go to the full flat file.
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- 2.4.1.14
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student
-
skill
- starch
-
social
-
anxiety
-
sintering
-
spark
-
post-traumatic
- invertase
-
stiff
-
physician
-
polystyrene
-
traumatic
-
school
-
senile
-
fear
-
emotional
-
session
-
services
-
faculty
-
tangles
-
microstructure
-
satisfaction
-
serrated
-
neurofibrillary
-
interpersonal
-
portray
-
undergraduate
-
colonoscopy
-
learner
-
anti-gad
-
curriculum
-
alloy
-
ceramics
-
raters
-
videotape
-
phobia
-
thematic
- hyperkalemia
-
transcranial
-
cronbach
-
trainees
-
empathy
-
patient-centered
-
self-assessment
-
postgraduate
-
examinees
-
first-year
-
sanitary
-
problem-solving
- biofuel production
- agriculture
- diagnostics
- analysis
Reaction
Synonyms
At5g20280, AtSPS, More, SPS, SPS A, SPS1, SPS11, Sps2, SPS4, SPS6, SPS8, SPSA, SpsB, SPSII, sucrose 6-phosphate synthase, sucrose phosphate synthase, sucrose phosphate synthase 4, sucrose phosphate synthase A, sucrose phosphate synthase B, sucrose phosphate synthetase, sucrose phosphate-uridine diphosphate glucosyltransferase, sucrose-P synthase, sucrose-phosphate synthase B, sucrosephosphate-UDP glucosyltransferase, UDP-glucose-fructose-phosphate glucosyltransferase, UDP-glucose:D-fructose-6-phosphate 2-alpha-D-glucosyltransferase, uridine diphosphoglucose-fructose phosphate glucosyltransferase
ECTree
2.4.1.14 sucrose-phosphate synthaseAdvanced search results
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General Information on EC 2.4.1.14 - sucrose-phosphate synthase
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GENERAL INFORMATION 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
evolution
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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
malfunction
metabolism
physiological function
additional information
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
malfunction
mutation of AtSWEET9 or nectary-expressed sucrose phosphate synthase genes leads to the loss of nectar secretion
malfunction
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mutation of AtSWEET9 or nectary-expressed sucrose phosphate synthase genes leads to the loss of nectar secretion
malfunction
mutation of AtSWEET9 or nectary-expressed sucrose phosphate synthase genes leads to the loss of nectar secretion
malfunction
overexpression and increased activity of the enzyme in alfalfa is accompanied by early flowering, increased plant growth and an increase in elemental N and protein content when grown under N2-fixing conditions
malfunction
the spsc null mutant displays reduced sucrose contents towards the end of the photoperiod and a concomitant 25% reduction in enzyme activity. In contrast, 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 changing carbon partitioning in favour of starch during the light period but limits starch degradation during the dark period
malfunction
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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
malfunction
suppression of isoform SPS4 promotes carbon metabolism to accumulate starch
metabolism
SPS catalyzes the first step in the synthesis of sucrose in photosynthetic tissue
metabolism
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sucrose phosphate synthase, together with the soluble acid invertase, are the key enzymes in regulating sucrose accumulation in sugarcane stalk, overview
metabolism
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sucrose phosphate synthase and sucrose synthase, EC 2.4.1.13, are key enzymes in the synthesis and breakdown of sucrose in sugarcane
metabolism
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sucrose phosphate synthase is an important component of the plant sucrose biosynthesis pathway
metabolism
the sucrose phosphate synthase reaction is the key enzymatic step in sucrose synthesis in plants. Sucrose phosphate phosphatase and sucrose phosphate synthase catalyze sequential reactions in sucrose synthesis in green plant cells, the interaction between decreased sucrose phosphate phosphatase activity and sucrose phosphate synthase activity may alter sucrose synthesis during cold acclimation in Klebsormidium flaccidum, enzyme regulation, overview
metabolism
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relationship between the contents of carbohydrate and sucrose metabolizing enzymes activities, overview
metabolism
relationship between the contents of carbohydrate and sucrose-metabolizing enzymes activities, overview
metabolism
sucrose phosphate synthase is a key enzyme for sucrose biosynthesis
metabolism
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sucrose phosphate synthase is a key enzyme for sucrose biosynthesis
metabolism
sucrose phosphate synthase is a key enzyme for sucrose biosynthesis
metabolism
sucrose-phosphate synthase catalyses one of the rate-limiting steps in the synthesis of sucrose in plants
metabolism
the enzyme plays a key role in carbon metabolism by catalyzing the synthesis of sucrose
metabolism
the enzyme SPS is encoded by different gene families. SPS exists in multiple forms which show differential distributions and functional specializations in the plant tissues. SPS activity is highly regulated by hierarchy of mechanisms including transcriptional control
physiological function
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SPS plays a crucial role in carbohydrate metabolism by regulating the partitioning of carbon between starch production and carbohydrate accumulation in many physiological and developmental processes, including responses to water stress, diurnal carbohydrate allocation within plants, and fruit and flower development
physiological function
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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
physiological function
sucrose-phosphate synthase refers to a key enzyme in sucrose biosynthesis in both photosynthetic and nonphotosynthetic tissues of plants
physiological function
the enzyme is essential for plant viability, the four SPS isozymes function in processes that are important for plant growth and nonstructural carbohydrate metabolism
physiological function
the enzyme is highly expressed in nectaries and that their expression is also essential for nectar secretion. Sucrose is synthesized in the nectary parenchyma by the enzyme and subsequently secreted into the extracellular space via SWEET9,a nectary-specific sugar transporter.In the the extracellular, sucrose is hydrolysed by an apoplasmic invertase to produce a mixture of sucrose, glucose and fructose. SWEET9 is essential for nectar production and can function as an efflux transporter
physiological function
the enzyme is highly expressed in nectaries, the expression is essential for nectar secretion. Sucrose is synthesized in the nectary parenchyma by the enzyme and subsequently secreted into the extracellular space via SWEET9, a nectary-specific sugar transporter. In the extracellular, sucrose is hydrolysed by an apoplasmic invertase to produce a mixture of sucrose, glucose and fructose. SWEET9 is essential for nectar production and can function as an efflux transporter
physiological function
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the enzyme is highly expressed in nectaries, the expression is essential for nectar secretion. Sucrose is synthesized in the nectary parenchyma by the enzyme and subsequently secreted into the extracellular space via SWEET9, a nectary-specific sugar transporter. In the extracellular, sucrose is hydrolysed by an apoplasmic invertase to produce a mixture of sucrose, glucose and fructose. SWEET9 is essential for nectar production and can function as an efflux transporter
physiological function
the enzyme is highly expressed in nectaries, the expression is essential for nectar secretion. Sucrose is synthesized in the nectary parenchyma by the enzyme and subsequently secreted into the extracellular space via SWEET9, a nectary-specific sugar transporter. In the extracellular, sucrose is hydrolysed by an apoplasmic invertase to produce a mixture of sucrose, glucose and fructose. SWEET9 is essential for nectar production and can function as an efflux transporter
physiological function
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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
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
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
physiological function
overexpression of isoform SPS4 can lead to carbon metabolism prioritizing sugar transport in cucumber
physiological function
transgenic Brachypodium distachyon plants reveal increased plant height at early growth stages and also higher biomass yield from fully senesced plants, which is increased up to 52% compared to wild type
physiological function
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transgenic Brachypodium distachyon plants reveal increased plant height at early growth stages and also higher biomass yield from fully senesced plants, which is increased up to 52% compared to wild type
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additional information
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
additional information
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
additional information
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
additional information
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
additional information
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
additional information
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gene expression analysis of sucrose biosynthesis genes during wheat plant ontogeny, overview
additional information
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
additional information
sucrose phosphate synthase contains a putative C-terminal sucrose phosphate phosphatase-like domain that may facilitates the binding of sucrose phosphate phosphatase, EC 3.1.3.24, interaction analysis in transgenic plants and yeast two-hybrid system, overview
additional information
the N-terminal region of sugarcane sucrose phosphate synthase is not essential for the catalytic reaction itself, but is crucial for the allosteric regulation by glucose 6-phosphate and may function like a suppressor domain for the enzyme activity
additional information
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the N-terminal region of sugarcane sucrose phosphate synthase is not essential for the catalytic reaction itself, but is crucial for the allosteric regulation by glucose 6-phosphate and may function like a suppressor domain for the enzyme activity
additional information
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sucrose phosphate synthase contains a putative C-terminal sucrose phosphate phosphatase-like domain that may facilitates the binding of sucrose phosphate phosphatase, EC 3.1.3.24, interaction analysis in transgenic plants and yeast two-hybrid system, overview
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