Literature summary for 2.4.1.18 extracted from

Dumez, S.; Wattebled, F.; Dauvillee, D.; Delvalle, D.; Planchot, V.; Ball, S.G.; DHulst, C.
Mutants of Arabidopsis lacking starch branching enzyme II substitute plastidial starch synthesis by cytoplasmic maltose accumulation (2006), Plant Cell, 18, 2694-2709.

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Protein Variants

Protein Variants	Comment	Organism
additional information	be1-1 (DYK140), T-DNA insertion mutant line for BE1. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be1-1 be2-1, T-DNA insertion double mutant in enzyme BE1 and BE2. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be1-1 be3-2, T-DNA insertion double mutant in enzyme BE1 and BE3. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be1-2 (N637880), T-DNA insertion mutant line for BE1. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be2-1 (EFH20), T-DNA insertion mutant line for BE2. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be2-1 be3-2, T-DNA insertion double mutant in enzyme BE2 and BE3. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type. The be2-1 be3-2 double mutant is free of starch, coupled with an accumulation of very high levels of water-soluble glucans, that are not observable in other lines. Moreover, this double mutant displays a lower growth rate, a pale color and a general wilting of the inflorescence.	Arabidopsis thaliana
additional information	be2-2 (DSA16), T-DNA insertion mutant line for BE2. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be3-1 (N548089), T-DNA insertion mutant line for BE3. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana
additional information	be3-2 (EQJ13), T-DNA insertion mutant line for BE3. The amount of amylose and the branching level of amylopectin are not significantly different in the mutants when compared with the wild type.	Arabidopsis thaliana

Localization

Localization	Comment	Organism	GeneOntology No.	Textmining

Organism

Organism	UniProt	Comment	Textmining
Arabidopsis thaliana	-	-	-

Source Tissue

Source Tissue	Comment	Organism	Textmining
leaf	-	Arabidopsis thaliana	-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg]	Specific Activity Maximum [µmol/min/mg]	Comment	Organism
0.001	-	be1-1 be2-1, T-DNA insertion double mutant in enzyme BE1 and BE2, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.001	-	be2-2 (DSA16), T-DNA insertion mutant line for BE2, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.002	-	be2-1 (EFH20), T-DNA insertion mutant line for BE2, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.002	-	be2-1 be3-2, T-DNA insertion double mutant in enzyme BE2 and BE3, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.051	-	be1-1 be3-2, T-DNA insertion double mutant in enzyme BE1 and BE3, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.082	-	be3-1 (N548089), T-DNA insertion mutant line for BE3, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.096	-	be1-1 (DYK140), T-DNA insertion mutant line for BE1, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.102	-	be3-2 (EQJ13), T-DNA insertion mutant line for BE3, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana
0.107	-	wild type enzyme, Col-0	Arabidopsis thaliana
0.107	-	wild type enzyme, Wassilewskija genetic background	Arabidopsis thaliana
0.13	-	be1-2 (N637880), T-DNA insertion mutant line for BE1, in vitro assay of starch-branching enzyme activity	Arabidopsis thaliana

Synonyms

Synonyms	Comment	Organism
BE1	-	Arabidopsis thaliana
BE1	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.	Arabidopsis thaliana
BE2	-	Arabidopsis thaliana
BE2	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.	Arabidopsis thaliana
BE3	-	Arabidopsis thaliana
BE3	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.	Arabidopsis thaliana
SBE	starch-branching enzyme	Arabidopsis thaliana

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Release 2023.1 (January 2023)