Question

Difference between tertiary and quaternary structures of protein.....: /

Answer 1

Hey there!

Tertiary structure is called the three-dimensional arrangement of all the atoms that make up the protein. This structure is directly responsible for the biological properties of a protein, since the spatial arrangement of the different functional groups determines its interaction with the various bonds that are formed.


When the protein consists of several polypeptide chains or subunits, it is said to have a quaternary structure. We also say that in this case, it is an oligomeric protein, that is, an oligomer formed by several monomers.

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Answer 2

The overall three-dimensional shape of an entire protein molecule is the tertiary structure.Although the three-dimensional shape of a protein may seem irregular and random, it is fashioned by many stabilizing forces due to bonding interactions between the side-chain groups of the amino acids.

 The quaternary structure refers to how these protein sub-units interact with each other and arrange themselves to form a larger aggregate protein complex. The final shape of the protein complex is once again stabilized by various interactions, including hydrogen-bonding, disulfide-bridges and salt bridges.
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