Protein Structure I - Amino Acid Names Flashcards
(21 cards)
Glycine
Gly or G
Non-polar but not strongly hydrophobic
H side chain
Alanine
Ala or A
Non-polar hydrophobic
Ch3 side chain
Phenylalanine
Phe or F
Hydrophobic
Ch2-benzene side chain
Tyrosine
Tyr or Y
Non-polar hydrophobic/hydrophilic (uncharged polar)
CH2-Benzene-OH side chain
How can you classify amino acid side chains?
Non-polar hydrophobic or polar hydrophilic
Polar hydrophilic can be uncharged,acidic or basic - charge at pH 7 (physiological pH)
Serine
Ser or S
Hydrophilic
Uncharged polar
CH2-OH side chain
Cysteine
Cys or C
Non-polar hydrophobic/hydrophilic (uncharged polar)
CH2-SH side chains
Aspartic acid
Asp or D
Hydrophilic
Charged, acidic
Ch2-carboxylate group side chains
Glutamic acid
Glu or E
Hydrophilic
Charged, acidic
CH2-CH2-carboxylate group
Lysine
Lys or K
Hydrophilic
Charged, basic
Ch2-ch2-ch2-ch2-nh3+
Arginine
Arg or R
Hydrophilic
Charged, basic
Ch2-ch2-ch2-Guanidino group
Histidine
His or H
Hydrophilic
Charged, basic/uncharged polar
CH2-Imidazole group side chain
Proline
Pro or P
Non-polar hydrophobic
side chain bonded to a-amino nitrogen
Valine
Val or V
Non-polar hydrophobic
CH-CH3
CH3 side chain bonded
Leucine
Leu or L
Non-polar hydrophobic
Ch2-chch3-ch3 side chain
Isoleucine
Ile or I
Non-polar hydrophobic
Chch3-ch2-ch3
Tyrptophan
Trp or W
Non-polar hydrophobic Ch3
Methionine
Met or M
Non-polar hydrophobic Ch3
Threonine
Thr or T
Hydrophilic
Uncharged polar
Asparagine
Asn or N
Hydrophilic
Uncharged polar
CH2-amide Side chain bonded
Glutamine
Gln or Q
Hydrophilic
Uncharged polar
Ch2-ch2-amide side chain bonded
