5 Bonds in Protein Structure

Proteins are the most abundant biological macromolecules occurring in all cells and all parts of cells. These are the molecular instruments through which genetic information is expressed. All proteins are constructed from the same ubiquitous set of 20 amino acids, covalently linked by peptide bonds in characteristics linear sequences. Amino acids condense to produce peptides. the bond formed is called peptide bond.
Bonds in Protein Structure
Bonds in Protein Structure
Types of Bonds in Protein Structure
1. Peptide bond: It is formed when a water  molecule is eliminated during a reaction between –NH2 of one amino acid and –COOH of another.
peptide bond
2. Ionic bond occurs  due to attractive force between oppositely charged ionised groups.

3. Disulphide bond may be formed between different chains of amino acids or between different parts of the chain. It provide some rigidity to the protein molecule.
Bond used in Protein Structure
4. Hydrogen bond develops due to sharing of H+ by two eletronegative atoms. It is a weak bond.

5. Hydrophobic bond is formed between two non polar groups. It help in excluding water in that area and increasing compaction.


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