Basics of Protein Structure: Difference between revisions
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The second level of structure is called secondary structure, and is the shapes (conformations) formed by short sequences of amino acids. This level of structure is stabilized by <scene name='57/575866/H_bond_a_helix/3'>hydrogen bonds</scene> along the <scene name='57/575866/Backbone/2'>backbone</scene>. (More about [[hydrogen bonds]].) The two most common shapes are [[Helices in Proteins|alpha helices]] and [[Sheets in Proteins|beta strands]]. These are favored simply because [[Tutorial:Ramachandran principle and phi psi angles|two atoms cannot occupy the same space]] (steric collisions). | The second level of structure is called secondary structure, and is the shapes (conformations) formed by short sequences of amino acids. This level of structure is stabilized by <scene name='57/575866/H_bond_a_helix/3'>hydrogen bonds</scene> along the <scene name='57/575866/Backbone/2'>backbone</scene>. (More about [[hydrogen bonds]].) The two most common shapes are [[Helices in Proteins|alpha helices]] and [[Sheets in Proteins|beta strands]]. These are favored simply because [[Tutorial:Ramachandran principle and phi psi angles|two atoms cannot occupy the same space]] (steric collisions). | ||
==Protein Structure Data== | |||
The [[Protein Data Bank|World Wide Protein Data Bank]] (WWPDB) is where all experimentally-determined published protein structures are made freely available. Each model has a unique accession code, called a [[PDB code]]. One model of human insulin, shown at right has the PDB code <tt>3i40</tt>. | |||
==Further Reading== | |||
For a more in depth discussion of protein structure, see [[Introduction to protein structure]] | For a more in depth discussion of protein structure, see [[Introduction to protein structure]] | ||
