Cloned (Comment) | Organism |
---|---|
gene gaaA, expression analysis in wild-type strain and in a strain overexpressing the D-galacturonic acid-specific GatA transporter | Aspergillus niger |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
D-galacturonate + NADPH + H+ | Aspergillus niger | - |
L-galactonate + NADP+ | - |
r | |
D-galacturonate + NADPH + H+ | Aspergillus niger CBS 120.49 | - |
L-galactonate + NADP+ | - |
r |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Aspergillus niger | A8DRH9 | - |
- |
Aspergillus niger CBS 120.49 | A8DRH9 | - |
- |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
mycelium | - |
Aspergillus niger | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
D-galacturonate + NADPH + H+ | - |
Aspergillus niger | L-galactonate + NADP+ | - |
r | |
D-galacturonate + NADPH + H+ | - |
Aspergillus niger CBS 120.49 | L-galactonate + NADP+ | - |
r |
Synonyms | Comment | Organism |
---|---|---|
gaaA | - |
Aspergillus niger |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7 | - |
assay at | Aspergillus niger |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NADP+ | - |
Aspergillus niger | |
NADPH | - |
Aspergillus niger |
General Information | Comment | Organism |
---|---|---|
metabolism | after import via the D-galacturonic acid transporter encoded by An14g04280, D-galacturonic acid is catabolized by three key enzymes: D-galacturonic acid reductase, L-galactonate dehydratase, and 2-keto-3-deoxy-galactonate aldolase, in Aspegillus niger. The first step in the D-galacturonic acid metabolism is the enzymatic conversion of D-galacturonic acid to L-galactonic acid by D-galacturonic acid reductase. Overexpression of the Aspergillus niger GatA transporter leads to preferential uptake of D-galacturonic acid over D-xylose of mutant strain JS013 and enanced use of D-galacturonic acid compared to D-xylose. Increased activity of the D-galacturonic acid metabolic pathway is observed for strain JS013 transformant strain in comparison to the control | Aspergillus niger |