Below is a sample of information that will be delievered in this course. Book the course to get an effective and extensive information on functions of enzymes in great detail.
WHAT IS AN ENZYME?
• Biological catalysts:
o Speed up rate of reaction without being used up
o Reaction need to be fast to sustain life
o Globular (spherical shaped)- soluble in water
o Polar side chains exposed on surface, non polar chains point inwards
• Consist of one or more polypeptide chains:
o Minority are Monomeric: a single polypeptide chain with 100- 300 amino acids linked by peptide bonds, tertiary structure
o Majority are Oligomers: two or more polypeptide chains (quaternary structure with covalent bonds), multiple binding sites
• Active sites/ substrate binding site:
o a small cleft/ pocket in an enzyme
o Substrate: molecule enzyme acts on or input to an enzyme- catalysed reaction
o Product: outputs of enzymic action
o Formed by folding of polypeptide chain into a small 3D shape region- binds to specific substrate only
o Enzyme- substrate complex held by weak hydrogen bonds
• Has specific activity:
o Acts on one specific substrate
o Bond specificity- acts on one type of chemical bond
o Group specificity- act on molecules with particular functional groups
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