Sandbox 30

Please do NOT make changes to this Sandbox. Sandboxes 30-60 are reserved for use by Biochemistry 410 & 412 at Messiah College taught by Dr. Hannah Tims during Fall 2012 and Spring 2013. Trypsin (Specifically 1QLQ) spinqualitylabelsall models Click on the links to the left to view different structural aspects. Ligand shown: SO4 Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Overview and Function An easy way to distinguish between main structural components of the protein is to view it using rainbow coloration. To see various other specific structures of Trypsin, click on their links. Rainbow Coloration Skeletal Structure α Helices β Sheets Backbone Side Chains (orange) Polar (blue), and Nonpolar (Crimson) - Ball and stick Polar (blue), and Nonpolar (Crimson) - Space filling model Water (blue) around Trypsin (orange) Hydrophobic Portion of Trypsin (red) Surface Structure Trypsin's primary amino acid sequence forms two α helices and two β sheets. Both of the α helices are right handed and the β sheets are anti-parallel. The order of the secondary structures is easily visible when using the rainbow coloration scheme to identify secondary structures. The N-terminus (blue) is the beginning of trypsin and the C-terminus (agua-green) is the end. Polar and Nonpolar Residues Polar residues are typically hydrophobic, and seek to be sheltered from the aqueous environments that proteins typically inhibit. The polarity of an amino acid is determined by its side chains (orange). When considering the ball and stick model it may look like the polar (blue) and nonpolar (crimson) residues are not organized in a specific manner, but when you consider the space filling model, it is evident that the majority of the polar residues are shielded by they nonpolar residues. Another way to show this principle is by looking at the location of the hydrophobic sections of Trypsin (red). The hydrophobic portions desire to be shielded from the water in the smallest area possible in order to minimize its interaction with water, thereby maximizing the entropy of the water. It is evident that basically all water molecules are kept outside the protein when viewing a rendering with water (water-blue, trypsin-orange). This form of trypsin (PDB 1QLQ), has been modified to help enable its crystalization, and thus has four water molecules inside of it instead of the normal three which is present in the wild-type trpsin. Ligand Interactions spinqualitylabelsall models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D References