Enzymes- What are they

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Slide 1

Enzymes

Learning objective: to examine what enzymes are and

describe how they work.

16th October

Slide 2

Enzymes

What are they?

Why do we need them?

Name some examples ?

Slide 3

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Slide 4

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Specific

Slide 5

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Specific

Increase rate of the reaction

Slide 6

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Specific

Increase rate of the reaction

Unchanged at the end of the reaction

Slide 7

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Specific

Increase rate of the reaction

Unchanged at the end of the reaction

Need them

Slide 8

Enzymes

Globular proteins that catalyse chemical reactions in living organisms

Properties

Specific

Increase rate of the reaction

Unchanged at the end of the reaction

Need them

Reactions too slow to maintain life

Can’t increase temperatures/pressure in cells (fatal)

Slide 9

Enzymes Are Proteins

The enzyme binds to the substrates by its active site

The active site is a pocket formed by the folding of the protein

where the substrates bind.

Slide 10

Enzymes Are Proteins

The enzyme binds to the substrates by its active site

The active site is a pocket formed by the folding of the protein

where the substrates bind.

Slide 11

Active site

The active site involves a small number of key residues that actually bind the

substrates

The rest of the protein structure is needed to maintain these residues in position

Slide 12