Читать книгу Plant Nucleotide Metabolism - Hiroshi Ashihara - Страница 60

Conversion of CAIR to SAICAR is catalysed by SAICARS (EC 6.3.2.6). In this reaction, aspartate is added at the α-amino group of CAIR with the consumption of ATP (step 7 in Figure 4.1, Reaction 7).

The expression of the pur7 gene is strongest in flowers, followed by stem, root, and leaves and is almost absent in siliques and pollen. It has been reported that the expression of the gene is associated with actively dividing tissues such as meristems, and is responsive to growth hormones (Senecoff et al. 1996).