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Why methionine cannot form disulfude bond in tertiary structure of protein
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Narayan singh
Disulfide bonds in proteins are formed between the thiol groups of cysteine residues by the process of oxidative folding. The other sulfur-containing amino acid, methionine, cannot form disulfide bonds. ... That is, the disulfide bond destabilizes the unfolded form of the protein by lowering its entropy. To form disulfide bonds, you need a thiol group (S-H). ... Methionine has only a S-CH3 group, which is a lot more stable than S-H, and so won't form disulfide bonds.
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Narayan singh Best Answer
Disulfide bonds in proteins are formed between the thiol groups of cysteine residues by the process of oxidative folding. The other sulfur-containing amino acid, methionine, cannot form disulfide bonds. ... That is, the disulfide bond destabilizes the unfolded form of the protein by lowering its entropy. To form disulfide bonds, you need a thiol group (S-H). ... Methionine has only a S-CH3 group, which is a lot more stable than S-H, and so won't form disulfide bonds.
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