Cloned (Comment) | Organism |
---|---|
genes pop2-1, pop2-2, and pop2-3, pop2-1 are located on chromosome 3, DNA and amino acid sequennce determination and analysis | Arabidopsis thaliana |
Protein Variants | Comment | Organism |
---|---|---|
additional information | construction of pop2-1 mutant, phenotype, overview | Arabidopsis thaliana |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-aminobutanoate + pyruvate | Arabidopsis thaliana | - |
succinate semialdehyde + L-alanine | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Arabidopsis thaliana | Q94CE5 | POP2; gene pop2-1 | - |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
flower | - |
Arabidopsis thaliana | - |
fruit | - |
Arabidopsis thaliana | - |
integument | - |
Arabidopsis thaliana | - |
leaf | - |
Arabidopsis thaliana | - |
pistil | - |
Arabidopsis thaliana | - |
plant funiculus | - |
Arabidopsis thaliana | - |
plant ovary wall | - |
Arabidopsis thaliana | - |
plant ovule | - |
Arabidopsis thaliana | - |
plant septum | - |
Arabidopsis thaliana | - |
pollen | - |
Arabidopsis thaliana | - |
pollen tube | - |
Arabidopsis thaliana | - |
stigma | - |
Arabidopsis thaliana | - |
style | - |
Arabidopsis thaliana | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-aminobutanoate + pyruvate | - |
Arabidopsis thaliana | succinate semialdehyde + L-alanine | - |
? |
Synonyms | Comment | Organism |
---|---|---|
GABA transaminase | - |
Arabidopsis thaliana |
Pop2 | - |
Arabidopsis thaliana |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
pyridoxal 5'-phosphate | - |
Arabidopsis thaliana |
General Information | Comment | Organism |
---|---|---|
malfunction | enzyme-deficient pop2 flowers accumulate GABA, and the growth of many pop2 pollen tubes is arrested, consistent with their in vitro GABA hypersensitivity. Some pop2 tubes continue to grow toward ovules, yet they are misguided, presumably because they target ectopic GABA on the ovule surface. Wild-type tubes decreased POP2 activity leads to increased levels of GABA throughout the ovule, coupled with aberrant growth and guidance of pop2 pollen tubes | Arabidopsis thaliana |
physiological function | the POP2 gene encodes a transaminase that degrades GABA and contributes to the formation of a gradient leading up to the micropyle, effect of GABA on pollen tube elongation in vitro | Arabidopsis thaliana |