Boehmer Lecture 2
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- Name the non-polar amino acids.
- Glycine, Alanine, Valine
- Name the polar amino acids.
- Serine, Threonine.
- Name the aromatic amino acids
- Phenylalanine, tyrosine, tryptophan
- Name the basic amino acids
- Lysine, Arginine
- Name the acid amino acids (negatively charged at neutral pH)
- Aspartate, Glutamate
- Name the carboxiamide amino acids (uncharged polar)
- Asparagine, Glutamine
- What aa's are polar with OH groups and why is this important?
- Serine, Threonine, Tyrosine. Important can be targeted for modification (eg.: glycosylation, phosphorylation)
- What are the 5 main roles of amino acid side chains?
-
1) Active site residues
2) H bonding
3) Hydrophobic interactions
4) Modification
5) Other structural roles - Why are histidine and cysteine important in acid-base catalysis?
- Because their Pk1 are 6.0 and 8.3, respectively, which are within neutral pH in cell environment.
- What leads to PKU (phenylketonuria)?
- If there's a defect in enzyme or cofactor in converting phenylalanine to tyrosine, then phenylalanine forms other compounds that lead to mental retardation.