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Information on EC 2.4.1.18 - 1,4-alpha-glucan branching enzyme
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EC Tree
2.4.1.18 1,4-alpha-glucan branching enzymeIUBMB Comments
Converts amylose into amylopectin. The accepted name requires a qualification depending on the product, glycogen or amylopectin, e.g. glycogen branching enzyme, amylopectin branching enzyme. The latter has frequently been termed Q-enzyme.
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Word Map
- 2.4.1.18
- biloba
- ginkgo
- amylopectin
- endosperm
- maize
- grain
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pyrophosphorylase
- phosphorylase
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granule-bound
- glucans
- potato
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debranching
- polysaccharide
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polyglucosan
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herbal
- ssiia
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ginkgolide
- kernel
- gelatin
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waxy
- glycogenosis
- amyloplasts
- pullulanase
- andersen
- dextrin
- isoamylase
- bilobalide
- agpase
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high-amylose
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amylolytic
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chain-length
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lafora
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rhodothermus
- biotechnology
- medicine
- adpglucose
- glycogenin
- food industry
- nutrition
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diastase-resistant
- alpha-glucans
- drug development
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pas-positive
- isorhamnetin
The enzyme appears in viruses and cellular organisms
Reaction Schemes
Synonyms
gbe, branching enzyme, sbeiib, glycogen branching enzyme, starch branching enzyme, sbeiia, beiib, sbeii, starch-branching enzyme, beiia, 
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SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
(1-4)-alpha-D-glucan:(1-4)-alpha-D-glucan 6-alpha-D-[(1-4)-alpha-D-glucano]-transferase
1,4-alpha-glucan branching enzyme
1,4-alpha-glucan branching enzyme 1
alpha-1,4-glucan:alpha-1,4-glucan 6-glycosyltransferase
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alpha-1,4-glucan:alpha-1,4-glucan-6-glycosyltransferase
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alpha-glucan branching enzyme
alpha-glucan-branching glycosyltransferase
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amylo-(1,4-1,6)-transglycosylase
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amylo-(1,4->1,6)-transglycosylase
amylose isomerase
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BBE
BE
BE-01
BE1
BE2
BE3
BEI
BEIIa
BEIIb
branching enzyme
branching factor, enzymatic
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branching glycosyltransferase
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Dr GBE
enzyme Q
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GBE
GBE1
GH13 GBE
GlgB
glucan transferase
glucosan transglycosylase
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glycogen branching enzyme
glycosyltransferase, alpha-glucan-branching
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ORF Rv1326c
Q-enzyme
QE
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SBE
SBE Iib
SBE-I
SBEIIA
SBEIIB
ScoBE
starch branching enzyme
starch branching enzyme I
starch branching enzyme II
starch branching enzyme IIa
starch branching enzyme IIb
starch-branching enzymes IIa
starch-branching enzymes IIb
TK1436
(1-4)-alpha-D-glucan:(1-4)-alpha-D-glucan 6-alpha-D-[(1-4)-alpha-D-glucano]-transferase
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(1-4)-alpha-D-glucan:(1-4)-alpha-D-glucan 6-alpha-D-[(1-4)-alpha-D-glucano]-transferase
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(1-4)-alpha-D-glucan:(1-4)-alpha-D-glucan 6-alpha-D-[(1-4)-alpha-D-glucano]-transferase
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BE
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BE1
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a gene putatively encoding an isoform of a starch-branching enzyme in Arabidopsis thaliana genome. AGI Gene Identification: At3g20440. The protein corresponding to the BE1 gene contains a predicted chloroplast-targeting peptide of 49 amino acids. The sequence homology between BE1 and both BE2 and BE3 is 28% and 27% amino acid identity, respectively.
BE2
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a gene putatively encoding an isoform of a starch-branching enzyme in Arabidopsis thaliana genome. AGI Gene Identification: At5g03650. The protein corresponding to the BE2 gene contains a predicted chloroplast-targeting peptide of 61 amino acids. BE2 and BE3 are two highly conserved proteins with over 75% amino acid identity.
BE3
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a gene putatively encoding an isoform of a starch-branching enzyme in Arabidopsis thaliana genome. AGI Gene Identification: At2g36390. The protein corresponding to the BE3 gene contains a predicted chloroplast-targeting peptide of 37 amino acids. BE2 and BE3 are two highly conserved proteins with over 75% amino acid identity.
GBE
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GBE
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glycogen branching enzyme
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ORF Rv1326c
in Mycobacterium tuberculosis H37Rv codes for a enzymatically active protein that utilizes amylose as the substrate
ORF Rv1326c
in Mycobacterium tuberculosis H37Rv codes for a enzymatically active protein that utilizes amylose as the substrate
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Q-enzyme
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SBE
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starch branching enzyme
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TK1436
encodes a branching enzyme from Thermococcus kodakaraensis belonging to the GH-57 family. The TK1436 protein contains neither alpha-galactosidase nor pullulanase activity.
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
2 1,4-alpha-D-glucan = alpha-1,4-D-glucan-alpha-1,6-(alpha-1,4-D-glucan) + H2O
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
cyclization
glycosyl group transfer
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PATHWAY SOURCE
PATHWAYS
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SYSTEMATIC NAME
IUBMB Comments
(1->4)-alpha-D-glucan:(1->4)-alpha-D-glucan 6-alpha-D-[(1->4)-alpha-D-glucano]-transferase
Converts amylose into amylopectin. The accepted name requires a qualification depending on the product, glycogen or amylopectin, e.g. glycogen branching enzyme, amylopectin branching enzyme. The latter has frequently been termed Q-enzyme.
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CAS REGISTRY NUMBER
COMMENTARY
9001-97-2
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
amylose
branched polyglucan
using linear amylose synthesized in a tandem reaction by potato phosphorylase
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?
beta-cyclodextrin
?
22.82% activity compared to amylose
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?
high-amylose corn starch
high-amylose corn starch containing alpha-1,6-glucosidic linkages
pea starch
pea starch containing alpha-1,6-glucosidic linkages
28.55% activity compared to amylose
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?
potato amylopectin type III
potato amylopectin type III containing alpha-1,6-glucosidic linkages
wheat starch
wheat starch containing alpha-1,6-glucosidic linkages
30.56% activity compared to amylose
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amylopectin
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the amount of short chains with a degree of polymerization of 6-8 is significantly increased in the product of Bacillus cereus
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amylopectin
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enzyme efficiently cyclizes the inner chain of amylopectin to degrade the molecule. The degradation stopps when the molecular mass of the product reaches about 150 kDa
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amylopectin
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assay at 30°C, reaction terminated by heating at 95°C for 5 min
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