Sandbox Reserved 480: Difference between revisions

These hydroxylases are tetramers which contain homologous subunits. Each subunit is made up of three domains: the regulatory domain, catalytic domain, and tetramerization domain. The regulatory domain is in the N-terminus region of the chain. The catalytic domain is found in the middle nearing the C-terminus and the last set of residues make up the tetramerization domain, which helps form the tetrameric structure. The regulatory domain affects the function of the active site. When the regulatory domain is <scene name='Sandbox_Reserved_480/Phosphorylated_pheoh/2'>phosphorylated</scene>, the active site is closed off and prevented form interacting with the substrates. In this scene the chain is colored from N-terminus to C-terminus blue to red and the active site and Fe (III) is colored black. In the <scene name='Sandbox_Reserved_480/Dephosphorylated_pheoh/1'>dephosphorylated</scene> PheOH, the active site is open to the subtrates and can convert them to products. Each subunit’s catalytic site is identified by an iron atom residing at the bottom of 10 Å deep cleft in the enzyme surface.<ref name="BH4_H"/> Fe is bound to three amino acid residues; His285, His290, and Glu184. Throughout the entire process of catalysis the Fe atom is in its ferrous form.