2.4.1.14: sucrose-phosphate synthase
This is an abbreviated version!
For detailed information about sucrose-phosphate synthase, go to the full flat file.
Word Map on EC 2.4.1.14
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2.4.1.14
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student
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skill
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starch
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social
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anxiety
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sintering
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spark
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post-traumatic
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invertase
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stiff
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physician
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polystyrene
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traumatic
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school
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senile
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fear
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emotional
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session
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services
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faculty
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tangles
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microstructure
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satisfaction
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serrated
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neurofibrillary
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interpersonal
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portray
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undergraduate
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colonoscopy
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learner
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anti-gad
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curriculum
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alloy
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ceramics
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raters
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videotape
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phobia
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thematic
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hyperkalemia
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transcranial
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cronbach
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trainees
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empathy
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patient-centered
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self-assessment
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postgraduate
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examinees
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first-year
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sanitary
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problem-solving
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biofuel production
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agriculture
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diagnostics
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analysis
- 2.4.1.14
-
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
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Inhibitors
Inhibitors on EC 2.4.1.14 - sucrose-phosphate synthase
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reduces Vmax to one third of control when supplied to intact leaves, no effect on light activation
cycloheximide
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no significant effect on Vmax, reduces extent of light activation
p-chloromercuribenzoate
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activity can be restored by addition of DTT or 2-mercaptoethanol
p-chloromercuribenzoate
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activity can be restored by addition of DTT or 2-mercaptoethanol
phosphate
86.3% inhibition of the nodule isozyme at 5 mM, 15.7% and 25.9% inhibition of the leaf enzyme at 2 mM and 5 mM, respectively. The inhibitory effect is increased in plants infected with an N-fixation deficient Sinorhizobium meliloti strain
phosphate
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SPS-I shows high sensitivity towards phosphate, whereas SPS-II is only slightly sensitive
phosphate
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in absence of glucose-6-phosphate, suggested to be a metabolic regulator in vivo
phosphate
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in absence of glucose-6-phosphate, no inhibition at pH 5.5, inhibitory at alkaline pH
phosphate
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partial competitive inhibitor with respect to both substrates in presence of 5 mM glucose-6-phosphate, competes with glucose-6-phosphate for the same binding site
phosphate
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maximum inhibition with 1.5-2 mol phosphate per mol tetramer, maximum velocity is not affected
phosphate
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E. coli expressed enzyme shows little sensitivity to phosphate inhibition, whereas tobacco expressed enzyme is highly phosphate sensitive
UDP
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competitive with UDP-glucose; reversible by addition of 5 mM Mn2+ or 10 mM Mg2+
additional information
poor effect by fructose and sucrose
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additional information
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preparation contains a protein kinase that can phosphorylate and therefore inactivate enzyme activity
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additional information
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the Synechocystis sps gene is introduced into tobacco, rice and tomato under the control of constitutive promoters. The Synechocystis SPS protein is expressed at high level. However SPS activities and carbon partitioning in leaves from transgenic and wild-type plants are not significantly different. The purified enzymes have full catalytic activity. It is proposed that some other protein in plant cells binds to the Synechocystis SPS resulting in inhibition of the enzyme
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additional information
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mechanisms involved in short-term feedback inhibition of sucrose synthesis by sucrose are lacking in wheat
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