Protein Structure
α-Helix in proteins stabilized mainly by:
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About This Question
- Subject
- chemistry
- Chapter
- biomolecules
- Topic
- protein structure
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Intrachain hydrogen bonds between C=O (i) and N–H (i+4)
- Secondary Structure: Refers to the local folding patterns of the polypeptide backbone.
- α-Helix: A common secondary structure pattern discovered by Linus Pauling.
- Stabilization: It is held together by intrachain hydrogen bonds.
- Pattern: The carbonyl Oxygen (C=O) of the ith amino acid residue forms a hydrogen bond with the amide Nitrogen (N−H) of the (i+4)th residue.
- Pitch: This results in a right-handed coiled structure with 3.6 residues per turn.
This hard difficulty chemistry question is from the chapter biomolecules, covering the topic of protein structure. It appeared in the 2025 exam.
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