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Biology-Related Homework Help Biochemistry Topic started by: Danivalda on Aug 29, 2019



Title: Interaction Between Residues in Tertiary Structures
Post by: Danivalda on Aug 29, 2019
What type of interaction would you expect between the residues of each of the following amino acids in a tertiary structure of a protein?

a.   cysteine and cysteine   
b.   glutamate and lysine
c.   tyrosine and water

Would you expect to find valine and leucine on the outside or the inside of the tertiary structure? Why?


Title: Re: Interaction Between Residues in Tertiary Structures
Post by: Cele_1015 on Aug 30, 2019
a.   Two cysteines, each containing —SH, will form a disulfide bond.
b.   The interaction of the —COO– in the residue of glutamate and the —NH3+ in the residue of lysine will form an ionic bond called a salt bridge.
c.   The residue in tyrosine has an —OH group that is attracted to water by hydrophilic interactions.



Both valine and leucine have nonpolar residues and would be found on the nonpolar inside of the tertiary structure.