Unit 6 Interactions

Opener Get a computer and complete Reading Comp 11 No talking Use your notes but not each other 10 minutes

Agenda Notes: Protein Structure Activity: Toothpickase Homework: Read and take notes on Ch. 48.1-48.3 Essential Questions: Describe how neuron structure and organization reflect function in information transfer? Explain how action potential signals are conducted by axons?

Basic Structure of Proteins Proteins are polymers of amino acids 20 standard amino acids coded for by DNA Proteins are large, complex molecules with multiple levels of structure Primary: order of amino acids Secondary: twists or folds in amino acid chain Tertiary: overall 3D shape Quaternary: multiple chains of amino acids The structure at each level depends on: How the amino acids interact with each other How the amino acids interact with the environment (i.e.: water)

Amino Acid Structure

Primary Secondary Structure Amino acids that are close to each other can interact The order and kind of the amino acids determines which amino acids interact, and how The interactions can affect the local shape of the chain

Secondary Tertiary Structure Amino acids located in different regions of the chain can interact The order and kind of the amino acids determines which amino acids interact, and how they interact The interactions determine the overall 3d shape of the protein

Tertiary Structure

Tertiary Quaternary Structure Amino acids located on different chains can interact The order and kind of the amino acids determines which amino acids interact, and how The interactions determine if multiple chains link together to form the protein

Quaternary Structure

Big Idea What a protein can do depends on its structure The structure depends what amino acids are present in the protein, the order of the amino acids, and the amino acid interactions (with each other and the environment)

Enzyme Video Glue the vocabulary words into your notebook Fill it out as you watch the video

Toothpickase