Protein Structure,
Classification and Functions
Likando Chababa
, What are proteins?
n Proteins are polymers of amino acids
joined together by peptide bonds
,n
PROTEINS
Proteins are macromolecules with a backbone formed by polymerization
of amino acids in a polyamide structure which constitute more than 50%
of the total dry body weight.
n They all contain C, H, O and N.
n Nearly all of them contain S and some have Cu, Zn, Fe and P.
n Different combination of amino acids infer different function of the
protein.
n Describing and understanding structure of proteins we need to approach
at several levels of complexity, arranged in a kind of conceptual
hierarchy.
n Four levels of protein structure are commonly defined.
, Primary Structure
n It is the linear sequence of amino acids
A description of all covalent bonds (mainly peptide bonds
and disulphide bonds) linking amino acid residues in a
polypeptide chain is its primary structure.
Most important element of 1° structure is the sequence of
amino acids
Classification and Functions
Likando Chababa
, What are proteins?
n Proteins are polymers of amino acids
joined together by peptide bonds
,n
PROTEINS
Proteins are macromolecules with a backbone formed by polymerization
of amino acids in a polyamide structure which constitute more than 50%
of the total dry body weight.
n They all contain C, H, O and N.
n Nearly all of them contain S and some have Cu, Zn, Fe and P.
n Different combination of amino acids infer different function of the
protein.
n Describing and understanding structure of proteins we need to approach
at several levels of complexity, arranged in a kind of conceptual
hierarchy.
n Four levels of protein structure are commonly defined.
, Primary Structure
n It is the linear sequence of amino acids
A description of all covalent bonds (mainly peptide bonds
and disulphide bonds) linking amino acid residues in a
polypeptide chain is its primary structure.
Most important element of 1° structure is the sequence of
amino acids
