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Which of the protein structure is often stabilised by S-S bonds?
  • a)
    Primary structure of protein
  • b)
    Secondary structure of protein
  • c)
    Quaternary structure of protein
  • d)
    Tertiary structure of protein
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Which of the protein structure is often stabilised by S-S bonds?a)Prim...
S-S bonds, also known as disulfide bonds, are covalent bonds formed between two cysteine amino acid residues in a protein. These bonds play a crucial role in stabilising the tertiary structure of a protein.
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Most Upvoted Answer
Which of the protein structure is often stabilised by S-S bonds?a)Prim...
Understanding Protein Structures
Proteins are essential biomolecules that play various roles in biological systems. Their structure is crucial for their function, and it is organized into four levels: primary, secondary, tertiary, and quaternary.

What are S-S Bonds?
S-S bonds, or disulfide bonds, are covalent bonds formed between the sulfur atoms of two cysteine amino acids. These bonds are important for stabilizing the three-dimensional shape of proteins.

Tertiary Structure of Proteins
The tertiary structure refers to the overall three-dimensional conformation of a protein, formed by the folding of the polypeptide chain. This structure is stabilized by several interactions, including:
- Hydrophobic interactions: Non-polar side chains aggregate away from water.
- Hydrogen bonds: Interactions between polar side chains.
- Ionic bonds: Electrostatic attractions between charged side chains.
- Disulfide bonds (S-S bonds): Covalent links that provide significant stability.

Importance of S-S Bonds
- Stability: S-S bonds enhance the stability of the tertiary structure by forming strong, covalent connections.
- Conformation: They help maintain the protein's specific shape, which is critical for its function.
- Redox Regulation: Disulfide bonds can be formed and broken under oxidative conditions, allowing dynamic changes in protein structure as needed.

Conclusion
In summary, while S-S bonds can also influence quaternary structure by linking different polypeptide chains, their primary role is in stabilizing the tertiary structure of proteins. This makes option 'D' the correct answer when associating S-S bonds with protein structure stability.
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Which of the protein structure is often stabilised by S-S bonds?a)Primary structure of proteinb)Secondary structure of proteinc)Quaternary structure of proteind)Tertiary structure of proteinCorrect answer is option 'D'. Can you explain this answer?
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