| abstract |
The present invention concerns proteins capable of converting chlorogenic acid into at least one di-, tri- or tetra-caffeoylquinic acid, comprising a sequence of amino acids chosen from SEQ ID NO:33 and SEQ ID NO:8 to SEQ ID NO:18, sequences homologous to these specific sequences, or fragments of such sequences that retain the activity of converting chlorogenic acid into at least one di-, tri- or tetra-caffeoylquinic acid. It also concerns isolated nucleic acid molecules coding for such proteins, and expression vectors of these sequences, host cells and transgenic plants. It further concerns the use of these proteins, expression vectors, host cells or transgenic plants to convert chlorogenic acid into at least one di-, tri- or tetra-caffeoylquinic acid, and various methods of producing at least one di-, tri- or tetra-caffeoylquinic acid from chlorogenic acid. |