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Protein Structure
University of Glasgow
24
Biology
Undergraduate 1
04/12/2013

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Term
common amino acid structure
Definition
[image]
all amino acids gain H+ onto amine, so its NH3+ and carboxylic acid loses H+
Term
(Gly)
Definition
Glycine(non-polar) , side group is Hydrogen atom
[image]
Term
(Ala)
Definition
Alanine(non-polar) --CH3
[image]
Term
(Val)
Definition
Valine (non-polar) 3 x CH3
[image]
Term
(Leu)
Definition
Leucine (non-polar)
[image]
Term
(Ile)
Definition
Isoleucine (non-polar)
[image]
Term
(Met)
Definition
Methionine (non-polar)
[image]
Term
(Phe)
Definition
Phenylalanine (non-polar)
[image]
Term
(Trp)
Definition
Tryptophan (non-polar)
[image]
Term
(Pro)
Definition
Proline (non-polar)
[image]
Term
(Ser) (Thr)
Definition
Serine, Threonine (polar)
[image]
Term
(Cys) (Tyr)
Definition
Cysteine, Tyrosine (polar)
[image]
Term
(Asn) (Gln)
Definition
Asparagine, Glutamine (polar)
[image]
Term
(Asp) (Glu) (Acid)
Definition
Aspartic Acid, Glutamic Acid (electrically charged) **Acid**
[image]
Term
Basic Electrically charged Amino Acids
Definition
Lysine (Lys) , Arginine (Arg) , Histidine (His)
[image]
Term
What are proteins?
Definition
polymers of L-α amino acids linked by peptide bonds that are flexible
Term
Primary Structure of Protein
Definition
the amino acid sequence
Term
Secondary Structure
Definition
The backbone folds regularly ; it is stabilized by H-bonds between NH and CO groups of the backbone
Term
Tertiary Structure
Definition
folds into a 3D shape stabilized by H-bonds, ionic bonds and hydrophobic interactions as well as disulfie bridges between backbones and sidechain groups
Term
Quaternary Structure
Definition
2 or more polypeptides joined together
Term
Different ways proteins fold?
Definition
1) Hydrophobic Interactions
2) Van der Waals
3) Hydrogen bonds between CO and NH
4) Disulfide Bridges (cysteins molecules)
5) Ionic bonds
Term
what protein helps other proteins fold?
Definition
chaperonin
Term
How is the phosphate group bonded to the ADP in ATP?
Definition
The phosphate group is bonded with an ionic bond that is helped by the protein Hexokinase
Term
Example of Protein Function
Definition
The sigmoid O2 saturation curve of haemoglobin allows it to bind O2 in lungs and release it in capillaries; high metabolic activity reduces pH and enhances unloading of O2
. At high altitude the level of bis-phosphoglycerate (BPG) rises and enhances O2 unloading.
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