Data extracted from this reference:
Cloned(Commentary)
gene SlCGT, functional expression in Nicotiana benthamiana leaves using Agrobacterium tumefaciens strain GV2260 transfection method
Solanum lycopersicum
Engineering
D328A
site-directed mutagenesis, the mutant shows 40% reduced activity
Solanum lycopersicum
S27A
site-directed mutagenesis, the mutant shows 13% reduced activity
Solanum lycopersicum
Inhibitors
PMSF
treatment of purified SlCGT with 1, 10, and 50 mM PMSF leads to strong decreases in caffeoyl transfer activities to 60%, 40%, and 0% activity, respectively
Solanum lycopersicum
Localization
apoplast
apoplastic space of tomato leaves
Solanum lycopersicum
48046
additional information
SiCGT contains a putative targeting signal of 24 amino acids indicating an entry of the SlCGT into the secretory pathway
Solanum lycopersicum
Molecular Weight [Da]
39950
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
40000
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
42580
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
Natural Substrates/ Products (Substrates)
chlorogenate + glucarate
Solanum lycopersicum
the enzyme catalyzes the formation of caffeoylglucarate and caffeoylgalactarate using chlorogenate, i.e. 5-O-caffeoylquinate, as acyl donor
quinate + 2-O-caffeoylglucarate
?
Organism
Solanum lycopersicum
E7AIM3
cv. Moneymaker, gene SlCGT, single-copy gene
Purification (Commentary)
native SlCGT 585fold from seedlings by ammonium sulfate fractionation, anion exchange and hydrophobic interaction chromatography, ultrafiltration, gel filtration, and again anion exchange chromatography
Solanum lycopersicum
Source Tissue
flower
Solanum lycopersicum
fruit
at different stages of ripening
Solanum lycopersicum
leaf
apoplastic space of tomato leaves
Solanum lycopersicum
additional information
tissue expression pattern, overview. Transcripts of SlCGT, enzyme activity, and caffeoylglucarate accumulate preferentially in tomato leaves and flowers
Solanum lycopersicum
root
Solanum lycopersicum
seedling
Solanum lycopersicum
stem
Solanum lycopersicum
Specific Activity [micromol/min/mg]
1.45
purified native enzyme, pH 6.0, 30°C
Solanum lycopersicum
Substrates and Products (Substrate)
chlorogenate + glucarate
719900
Solanum lycopersicum
quinate + 2-O-caffeoylglucarate
?
chlorogenate + glucarate
the enzyme catalyzes the formation of caffeoylglucarate and caffeoylgalactarate using chlorogenate, i.e. 5-O-caffeoylquinate, as acyl donor
719900
Solanum lycopersicum
quinate + 2-O-caffeoylglucarate
?
Subunits
?
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
More
peptide sequences are obtained by trypsin digestion and spectrometric sequencing, structure-function analysis, overview
Solanum lycopersicum
Synonyms
chlorogenate:glucarate caffeoyltransferase
Solanum lycopersicum
Temperature Optimum [°C]
30
assay at
Solanum lycopersicum
pH Optimum
6
assay at
Solanum lycopersicum
pI Value
Solanum lycopersicum
sequence calculation, mature CGT without signal sequence
5.01
Solanum lycopersicum
sequence calculation, CGT with signal sequence
5.25
Cloned(Commentary) (protein specific)
gene SlCGT, functional expression in Nicotiana benthamiana leaves using Agrobacterium tumefaciens strain GV2260 transfection method
Solanum lycopersicum
Engineering (protein specific)
D328A
site-directed mutagenesis, the mutant shows 40% reduced activity
Solanum lycopersicum
S27A
site-directed mutagenesis, the mutant shows 13% reduced activity
Solanum lycopersicum
Inhibitors (protein specific)
PMSF
treatment of purified SlCGT with 1, 10, and 50 mM PMSF leads to strong decreases in caffeoyl transfer activities to 60%, 40%, and 0% activity, respectively
Solanum lycopersicum
Localization (protein specific)
apoplast
apoplastic space of tomato leaves
Solanum lycopersicum
48046
additional information
SiCGT contains a putative targeting signal of 24 amino acids indicating an entry of the SlCGT into the secretory pathway
Solanum lycopersicum
Molecular Weight [Da] (protein specific)
39950
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
40000
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
42580
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
Natural Substrates/ Products (Substrates) (protein specific)
chlorogenate + glucarate
Solanum lycopersicum
the enzyme catalyzes the formation of caffeoylglucarate and caffeoylgalactarate using chlorogenate, i.e. 5-O-caffeoylquinate, as acyl donor
quinate + 2-O-caffeoylglucarate
?
Purification (Commentary) (protein specific)
native SlCGT 585fold from seedlings by ammonium sulfate fractionation, anion exchange and hydrophobic interaction chromatography, ultrafiltration, gel filtration, and again anion exchange chromatography
Solanum lycopersicum
Source Tissue (protein specific)
flower
Solanum lycopersicum
fruit
at different stages of ripening
Solanum lycopersicum
leaf
apoplastic space of tomato leaves
Solanum lycopersicum
additional information
tissue expression pattern, overview. Transcripts of SlCGT, enzyme activity, and caffeoylglucarate accumulate preferentially in tomato leaves and flowers
Solanum lycopersicum
root
Solanum lycopersicum
seedling
Solanum lycopersicum
stem
Solanum lycopersicum
Specific Activity [micromol/min/mg] (protein specific)
1.45
purified native enzyme, pH 6.0, 30°C
Solanum lycopersicum
Substrates and Products (Substrate) (protein specific)
chlorogenate + glucarate
719900
Solanum lycopersicum
quinate + 2-O-caffeoylglucarate
?
chlorogenate + glucarate
the enzyme catalyzes the formation of caffeoylglucarate and caffeoylgalactarate using chlorogenate, i.e. 5-O-caffeoylquinate, as acyl donor
719900
Solanum lycopersicum
quinate + 2-O-caffeoylglucarate
?
Subunits (protein specific)
?
x * 40000, about, SDS-PAGE, x * 39950, mature CGT without signal sequence, sequence calculation, x * 42580, CGT with signal sequence, sequence calculation
Solanum lycopersicum
More
peptide sequences are obtained by trypsin digestion and spectrometric sequencing, structure-function analysis, overview
Solanum lycopersicum
Temperature Optimum [°C] (protein specific)
30
assay at
Solanum lycopersicum
pH Optimum (protein specific)
6
assay at
Solanum lycopersicum
pI Value (protein specific)
Solanum lycopersicum
sequence calculation, mature CGT without signal sequence
5.01
Solanum lycopersicum
sequence calculation, CGT with signal sequence
5.25
General Information
evolution
the sequence determines SlCGT as a GDSL lipase-like protein, representing it as a member of the SGNH protein superfamily. Lipases of this family employ a catalytic triad of Ser-Asp-His with Ser as nucleophile of the GDSL motif. The catalytic triad of the GDSL lipase is not essential for SlCGT enzymatic activity. SlCGT is therefore an example of a GDSL lipase-like protein that has lost hydrolytic activity and has acquired a completely new function in plant metabolism, functioning in secondary metabolism as acyltransferase in synthesis of hydroxycinnamate esters by employing amino acid residues different from the lipase catalytic triad
Solanum lycopersicum
additional information
the deduced SlCGT amino acid sequence matches the conservation of the serine catalytic motif GXSXXDXG within the first consensus block near the N-terminus. A serine moiety of the GDSL protein may be part of the catalytic center in SlCGT
Solanum lycopersicum
General Information (protein specific)
evolution
the sequence determines SlCGT as a GDSL lipase-like protein, representing it as a member of the SGNH protein superfamily. Lipases of this family employ a catalytic triad of Ser-Asp-His with Ser as nucleophile of the GDSL motif. The catalytic triad of the GDSL lipase is not essential for SlCGT enzymatic activity. SlCGT is therefore an example of a GDSL lipase-like protein that has lost hydrolytic activity and has acquired a completely new function in plant metabolism, functioning in secondary metabolism as acyltransferase in synthesis of hydroxycinnamate esters by employing amino acid residues different from the lipase catalytic triad
Solanum lycopersicum
additional information
the deduced SlCGT amino acid sequence matches the conservation of the serine catalytic motif GXSXXDXG within the first consensus block near the N-terminus. A serine moiety of the GDSL protein may be part of the catalytic center in SlCGT
Solanum lycopersicum
Other publictions for EC 2.3.1.98
719900
Teutschbein
Identification and localizatio ...
Solanum lycopersicum
J. Biol. Chem.
285
38374-38381
2010
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487780
Strack
Properties and activity change ...
Solanum lycopersicum
Plant Physiol.
92
41-47
1990
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