Gene: AT2G40840 (Arabidopsis thaliana)

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Gene Identifier
AT2G40840
Transcript Identifier
AT2G40840.1
Gene Type
Coding gene
Location
Chr2 : 17045368-17050779 : positive

Family

Gene family
HOM04M003624
(47 genes in 28 species)
specific family
Subfamily
ORTHO04M005189
(42 genes in 28 species)
specific family

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

Type Value
symbolDPE2
tidAT2G40840.1
UniProtQ8RXD9

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Biological Process

GO termEvidence(s)ProviderDescriptionSource
GO:0005975 IEAInterProcarbohydrate metabolic process
GO:0000023 IMPUniProtmaltose metabolic process1
GO:0005983 TASUniProtstarch catabolic process1
GO:0005976 TASUniProtpolysaccharide metabolic process1
GO:0000025 IDAUniProtmaltose catabolic process1

Molecular Function

GO termEvidence(s)ProviderDescriptionSource
GO:2001070 IEAUniProtstarch binding1
GO:0004134 IDA, IGIISS, IEA, UniProt4-alpha-glucanotransferase activity1 2 3
GO:0030246 IEAInterProcarbohydrate binding
GO:0010297 IDAUniProtheteropolysaccharide binding1

Cellular Component

GO termEvidence(s)ProviderDescriptionSource
GO:0009507 ISMGene Ontologychloroplast1
GO:0005829 IDAUniProtcytosol1

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Experimental Evidence
Electronic Evidence
Computational Reviewed Evidence
GO Sources:   Primary     Orthology     Homology  
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InterPro Description
IPR034841DPE2, CBM20 domain 2
IPR034840DPE2, CBM20 domain 1
IPR013783Immunoglobulin-like fold
IPR003385Glycoside hydrolase, family 77
IPR002044Carbohydrate binding module family 20
IPR017853Glycoside hydrolase superfamily
IPR013784Carbohydrate-binding-like fold

Mapman id Description
3.2.3.5.1.Carbohydrate metabolism.starch metabolism.degradation.maltose metabolism.cytosolic glucanotransferase
No SignalP domains detected for this gene.