User:Eleanor Crabb/Sandbox 2: Difference between revisions
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Protein structure | Protein structure | ||
Returning now to both chains in the structure 1z3a we will use this to identify the four tiers of protein structure.<applet load='1z3a' size='300' frame='true' align='right' caption='Insert caption here' /><scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina/1'> the amino acid residue</scene> | Returning now to both chains in the structure '''1z3a''' we will use this to identify the four tiers of protein structure.<applet load='1z3a' size='300' frame='true' align='right' caption='Insert caption here' /><scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina/1'> the amino acid residue</scene> | ||
The '''primary structure''' is simply the arrangement of amino acid residues with in the chain. This can be emphasized by colouring Chain A according to <scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina_amino/1'>residue</scene>. Hover your cursor over the molecule to identify some of the different residues present in the protein. | The '''primary structure''' is simply the arrangement of amino acid residues with in the chain. This can be emphasized by colouring Chain A according to <scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina_amino/1'>residue</scene>. Hover your cursor over the molecule to identify some of the different residues present in the protein. | ||
The protein can also be coloured according to the '''secondary structure'''. | The protein can also be coloured according to the '''secondary structure'''. The <scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina_secondarystructure/1'>secondary structure</scene>here are the alpha-helices shown in pink, beta-sheets in yellow, with the interconnecting loops in white. Rotate the molecule to look at these features in more detail. If we now consider just the <scene name='User:Eleanor_Crabb/Sandbox_2/1z3a_chaina_hbonds/1'>backbone with hydrogen bonds</scene> we can see how this secondary structure is held together by hydrogen bonds. | ||
As an enzyme, this protein is an example of a globular protein as we can see when consider the space-filled representation of the entire protein, both chains A and B. This the tertiary structure of the protein. | |||
Finally, the quaternary structure here refers . In this particular example | |||
