Quaternary Protein Structure
The quaternary structure of proteins is the highest level of protein structure, and refers to the interactions between separate proteins to form a multiprotein complex.
- Quaternary Structure
- Interactions between separate proteins to form a multiprotein complex
- Involves the same forces as tertiary structures
- Interactions with water, hydrogen bonding, electrostatic interactions, van der Waals forces, and disulfide bonds
One common example of quaternary structure is the bringing together of 4 globin proteins in hemoglobin. These 4 globin molecules and heme come together to form a single multi-protein complex called hemoglobin, which plays a key role in carrying oxygen in our blood.