What are the effect of a greater number of cysteine amino acids on the stability of the proteins?

The effect of a greater number of cysteine amino acids enhance the stability of the proteins due to formation of S-S bridge.

Explanation:

Cysteine is a naturally occuring amino acid and it is exist in L-form abundantly. Cysteine involve in formation of sulfhydril group which is very reactive. Cysteine easily oxidised to form dimer i. e., known as Cystine. Cystine is very important to analyse the primary structure of proteins, effects while changing in secondary structure and stablization of tertiary and quaternary structure. Cysteine play very important role in three dimensional conformation of protein molecule and provide stablity. Disulfide bridge present between two cysteine are responsible for the formation of the loops of backbone and disulfide bridge also provide the stability to loop of various proteins molecule. Quaternary structure mainly possible because of cysteine, here disulfide bridge of cysteine cause the linkage of various seprated polypeptides. In quaternary structure of various polypeptide chains are joinded together by interchain disulfide bridge. These interchains of disulfide bridge also provide stability of quaternary structure of proteins. The present of greater number of cysteine amino acids enhance the stablity of proteins molecules.