1.1.1.331 evolution molecular phylogenetic analysis of specialized metabolic enzyme genes from lignan-producing plants, two common gene clusters include genes from various plants and plant lineage-specific gene clusters. The specialized metabolic enzyme genes from lignan-producing plants include enzymes involved in the early common lignan biosynthesis upstream of matairesinol such as PLR and SIRD, suggesting that they have occurred in their ancestral plants and conserved their biological functions 743611 1.1.1.331 metabolism the enzyme catalyzes a step in the podophyllotoxin biosynthesis pathway 763661 1.1.1.331 metabolism the enzyme is involved in the enzymatic cascade for (-)-podophyllotoxin biosynthesis 762561 1.1.1.331 metabolism the enzyme is involved in the lignan biosynthesis pathway, overview 743611 1.1.1.331 metabolism the enzyme is involved in the lignan biosynthetic pathways in Forsythia, overview 742033 1.1.1.331 metabolism the enzyme is part of the podophyllotoxin, PPT, biosynthetic pathway -, 743278 1.1.1.331 metabolism the enzyme is part of the podophyllotoxin, PPT, biosynthetic pathway, overview. Podophyllotoxin is an important aryltetralin lignan, that possesses antitumor and antihyperlipidemic activities 743768 1.1.1.331 additional information the enzyme forms a homotetramer composed of an alpha/beta single domain structure with a dinucleotide-binding Rossmann fold for the binding of NAD+ and an active site with a highly conserved catalytic triad of amino acids, Ser153, Tyr167 and Lys171 743278 1.1.1.331 physiological function matairesinol biosynthesis is prominently enhanced and matairesinol is highly accumulated in callus 743611 1.1.1.331 physiological function the enzyme secoisolariciresinol dehydrogenase facilitates the dehydrogenation of secoisolariciresinol to form matairesinol, a mid-pathway intermediate product in podophyllotoxin, PPT, biosynthesis -, 743278