Quaternary Structure of Protein - Medicinal Chemistry 1.8

Protein quaternary structure refers to the number and the association of protein or polypeptide subunits in a multi-subunit/oligomeric protein complex. Each of these subunits has its own primary, secondary and tertiary structure. But for a protein to function properly, the subunits in a quaternary structure must be arranged in a specific way.
Fibrous protein and globular protein are the two main classifications of proteins with the complex quaternary structures. Fibrous proteins tend to be long and narrow because most of them are coiled helices or polypeptide chains, while globular proteins tend to form round and spherical from protein folding. Fibrous proteins exit for their structural role, but globular proteins are more functional. Because of their structural features, fibrous proteins tend to be more stable but less soluble than globular protein.
0:00 Overview
0:51 Protein subunit
1:16 Quaternary structure
2:16 Fibrous protein vs. globular protein
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Very helpful. It's a shame how underrated this is, but you make things very simple to follow.

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Glad it was helpful!