Download Amino acid side chains stabilise the enzyme shape Hydrogen bonds

Amino acid side chains
stabilise the enzyme shape
Hydrogen bonds in the tertiary
protein structure
Many amino acids contain groups in the side chains
that have a hydrogen atom attached to either an
oxygen or nitrogen atom. Hydrogen bonding can
occur between such groups.
Ionic bonds in the tertiary
protein structure
An ionic bond can form between amino acids
which contain a carboxylic acid group (-COOH)
and an amino group (-NH2)
Sulfur Bridges
Another way in which the tertiary structure can be held in place involve the
amino acid cysteine. A sulfur bridge is a type of bond that can form between two
cysteine residues that are close together when the protein chain is folded. Each
cysteine residue loses a hydrogen in the form of H+. This is a covalent bond
between the two sulphur atoms (S-S) which is stronger than a hydrogen bond.