CHEMISTRY OF AMINO ACIDS Flashcards
Around pH, Carboxyllic acid will be
Ionized (-)
Around pH 7, Amine group will
Be Ionized (+)
Ionized are easily dissolved in H2O
True
Solid amino acid has (MP)
Higher melting point
Alliphatic Side Chains
Gly, Ala, Val, Pro, Ile, Leu, Met
High Hydrophathy Index
Hydrophobic
Low Hydrophathy Index
Hydrophillic
Aromatic side chain
Phe, Tyr, His, Trp
Polar Uncharged side chain
Ser, Thr, Cys, Asn, Gln, Tyr
Negative charged polar side chain
Asp, Glu
Positive charged polar side chain
Arg, Lys, His
Essential amino acids
Source from diet
Non essential amino acid
Can be synthesize by the body
Separation of Amino Acids
Electrophoresis, and Chromatography
High pI
Cathode -
Low pI
Anode +
Stationary phase
Polar
Mobile phase
Nonpolar
PVTTIMHALL
Phe, Val, Thr, Trp, Ile, Met, His, Arg, Leu, Lys
L-Cysteine has
R configuration
Functions of Proteins
Catalytic, Contractile, Hormonal, Protective, Receptors, Regulatory, Structural, Transport
Catalytic
Enzymes
Contractile
Actin, Myosin
Hormonal
Insulin, hCG
Protective
Fibrin, Immunoglobulins, Interferons
Receptors
Nicotinic and adreganic recpetors
Regulatory
Calmoudin, transcription factors
Structural
Elastin, Keratin, Collagen
Transport
Hemoglobin, Lipoproteins, Transferrin
Primary structure
Joined by peptide bond
Trans conformer of amino acids is
The most common
Secondary structure
Ordered structure adopted by the chain through h bonds
Types of secondary structures
Alpha helix, beta sheet, and beta turn
Beta turn
4 consecutive amino acids, mostly proline and glycine, some are asparagine and aspartate
Supersecondary structure
Higher than secondary but has no functions
Forces stabilizing folding
Covalent, ionic, h bond, van der waals
Chaperones
Involves in degradation and folding of proteins
Prions
Misfolded proteins that causes disease
Receptors and enzymes as drug targets
Most studied and largest groups of protein targets
Carriers and transporters as drug targets
Have recognition sites for specific ligands
Sttuctural proteins as drug targets
Most common in cancer, not usual target due to its low selectivity
Peptide hormone as drugs
Insulin, Insulin lispro, and insulin aspart
Insulin
Proline 28, glycine 29
Insulin lispro
Proline 29, glycine 28
Cutdown polypeptides as drugs
Part of the functional protein is given
Poor gut absorption
Rapid elimination
Trigger immuno response
Monoclonal antibodies
Identical antibodies produced by identical b lympocyte
Zumab
Humanized
Umab
Human
Momab
Mouse urine
Ximab
Chimeric
Immunoglobulins
Mixture of antibodies
Passive immunization
Teriparatide (PTH)
Osteoporosis
Etanercept
Rheumatoid arthritis