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

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 .

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