Gene: AT2G40840 (Arabidopsis thaliana)

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Gene Identifier
AT2G40840
Transcript Identifier
AT2G40840.1
Gene Type
Coding gene
Location
2 : 17045368-17050779 : positive

Family

Gene family
HOM03M005709
(18 genes in 16 species)
specific family

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Descriptions

Description
disproportionating enzyme 2
Curated Summary
Encodes a cytosolic protein with transglucosidase and amylomaltase activity. It is an essential component of the pathway from starch to sucrose and cellular metabolism in leaves at night. The protein binds to heteroglycans and utilizes glucose, mannose and xylose as acceptors. Fucose and galactose can also act as acceptors but less efficiently than the previous three. It was also was also recently reported to act on maltodextrins. On the other hand, arabinose and fructose were not efficiently used. Its role probably includes metabolizing maltose exported from the chloroplast. Studies using maltose extracted from the double mutant be2-1 be3-2 showed that this enzyme is preferentially active of β-maltose.
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Identifiers

Identifier Name
aliasDPE2
aliasdisproportionating enzyme 2
uniprotQ8RXD9

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Biological Process

GO termEvidence(s)ProviderDescriptionSource
GO:0000023IMP, RCAGene Ontologymaltose metabolic process1 2
GO:0005983TASUniProtstarch catabolic process1 2 3 4 5 6 7 8 9 10 11 12 13
GO:0005976TASGene Ontologypolysaccharide metabolic process1
GO:0000025IDAUniProtmaltose catabolic process1 2 3 4 5 6 7 8 9 10 11 12 13
GO:0000272RCAGene Ontologypolysaccharide catabolic process1
GO:0005982RCAGene Ontologystarch metabolic process1
GO:0007623RCAGene Ontologycircadian rhythm1
GO:0009664RCAGene Ontologyplant-type cell wall organization1
GO:0019252RCAGene Ontologystarch biosynthetic process1
GO:0043085RCAGene Ontologypositive regulation of catalytic activity1
GO:0005975IEAInterProcarbohydrate metabolic process

Molecular Function

GO termEvidence(s)ProviderDescriptionSource
GO:0004134IDA, IGI, ISSIEA, UniProt4-alpha-glucanotransferase activity1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
GO:0010297IDAUniProtheteropolysaccharide binding1 2 3 4 5 6 7 8 9 10 11 12 13
GO:2001070IEAUniProtstarch binding1 2 3 4 5 6 7 8 9 10 11 12
GO:0030246IEAInterProcarbohydrate binding
GO:0003824IEAInterProcatalytic activity

Cellular Component

GO termEvidence(s)ProviderDescriptionSource
GO:0009507ISMGene Ontologychloroplast1
GO:0005829IDAUniProtcytosol1 2 3 4 5 6 7 8 9 10 11 12 13

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Experimental Evidence
Electronic Evidence
Computational Reviewed Evidence
GO Sources:   Primary     Orthology     Homology  
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InterPro Description
IPR002044Carbohydrate binding module family 20
IPR013784Carbohydrate-binding-like fold
IPR017853Glycoside hydrolase, superfamily
IPR013783Immunoglobulin-like fold
IPR003385Glycoside hydrolase, family 77
IPR013781Glycoside hydrolase, catalytic domain

Mapman id Description
2.2.2.4major CHO metabolism.degradation.starch.D enzyme
No SignalP domains detected for this gene.