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Literature summary for 2.4.1.25 extracted from

  • Steichen, J.M.; Petty, R.V.; Sharkey, T.D.
    Domain characterization of a 4-alpha-glucanotransferase essential for maltose metabolism in photosynthetic leaves (2008), J. Biol. Chem., 283, 20797-20804.
    View publication on PubMed
Search for more literature for 2.4.1.25

Cloned(Commentary)

Cloned (Comment) Organism
DPE2, phylogenetic analysis Arabidopsis thaliana

Protein Variants

Protein Variants Comment Organism
additional information the glycosyl hydrolase domain alone provides disproportionating activity with a much higher affinity for short maltodextrins than the complete wild-type enzyme, while absence of the carbohydrate binding modules completely abolishes activity with large complex carbohydrates, reflecting the presumed function of DPE2 in vivo Arabidopsis thaliana

Localization

Localization Comment Organism GeneOntology No. Textmining
cytosol
-
 Arabidopsis thaliana 5829
-

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Arabidopsis thaliana 4-alpha-glucanotransferase is essential for maltose metabolism in photosynthetic leaves ?
-
 ?

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana Q8RXD9
-
-

Reaction

Reaction Comment Organism Reaction ID
Transfers a segment of a (1->4)-alpha-D-glucan to a new position in an acceptor, which may be glucose or a (1->4)-alpha-D-glucan catalytic mechanism and domain structure and function Arabidopsis thaliana
a

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
 Arabidopsis thaliana
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information 4-alpha-glucanotransferase is essential for maltose metabolism in photosynthetic leaves Arabidopsis thaliana ?
-
 ?
additional information DPE2 transfers the non-reducing glucosyl unit from maltose to glycogen by a ping-pong mechanism. The forward reaction, i.e. consumption of maltose, is specific for the beta-anomer of maltose, while the reverse reaction, i.e. production of maltose, is not stereospecific for the acceptor glucose Arabidopsis thaliana ?
-
 ?

Subunits

Subunits Comment Organism
additional information DPE2 is a modular protein consisting of a family 77 glycosyl hydrolase domain, similar to DPE1, but unlike DPE1 the domain is interrupted by an insertion of about 150 amino acids as well as an N-terminal extension that consists of two carbohydrate binding modules, domain structure and functiosn, overview Arabidopsis thaliana

Synonyms

Synonyms Comment Organism
DPE2
-
 Arabidopsis thaliana