Question

Describe the secondary structure of proteins.

   Describe the secondary structure of proteins.

Chemistry

Thomas Myers,Keith… 1st Edition

Chapter 20, Problem 6

Instant Answer

Solved by Expert Mariana Roldan

07/24/2020

Step 1

This folding is a result of hydrogen bonding. This can be represented as: \[ \text{Protein} \xrightarrow[\text{Hydrogen bonding}]{\text{Local folding}} \text{Secondary structure} \] Show more…

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Describe the secondary structure of proteins.

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Key Concepts

Turns and Loops

Turns and loops are non-repetitive regions of a protein that connect elements of secondary structure such as alpha helices and beta sheets. These regions are important for the compact folding of the protein and often play roles in the function and flexibility of the molecule.

Beta-Pleated Sheet

The beta-pleated sheet is another prevalent secondary structure, consisting of beta strands aligned side by side, which can run in parallel or antiparallel orientations. The strands are linked by hydrogen bonds, creating a folded, pleated sheet-like configuration that contributes to the overall stability of the protein.

Hydrogen Bonding

Hydrogen bonding plays a crucial role in stabilizing the secondary structure of proteins by forming links between the backbone amide hydrogen and carbonyl oxygen atoms. This bonding leads to the formation of repetitive structures and helps maintain the local conformations of the polypeptide chain.

Alpha Helix

The alpha helix is a common secondary structure characterized by a right-handed spiral where every backbone N-H group forms a hydrogen bond with the backbone C=O group located four residues earlier. This structure provides significant rigidity and is critical in forming the framework of many proteins.

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