Presentation is loading. Please wait.

Presentation is loading. Please wait.

Proteins. What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins are.

Published byEunice Evans Modified over 9 years ago

Similar presentations

Presentation on theme: "Proteins. What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins are."— Presentation transcript:

1 Proteins

2 What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins are amino acids –20 total AA

3

4

5 Major Functions of Proteins 1.Provide energy 2. Enzyme catalyst: speed up rxn 3. Defense: use shape to recognize foreign invaders

6 4. Transport: hemoglobin-oxygen to RBC 5.Support: fibrous proteins 1.Fibrin in blood clots 2.Collagen-matrix of skin

7 Amino Acids Monomers of Proteins All contain: 1. Amino group NH 2 2. Carboxyl group –COOH 3. R group -different for every AA -determines the properties of AA Joined together by peptide bonds

8 Peptide Bonds Amino acids join together by peptide bond Forms when amino end of one AA joins to carboxyl end of another AA by dehydration synthesis.

9

10 Protein structures As AA join, R groups interact and cause molecules to bond 1.Primary-straight chain 2.Secondary- α-helix or β-pleated sheet 3.Tertiary-mass 4.Quaternary-2 proteins combined

11

12 Enzymes All enzymes are proteins Speed up chemical rxn; catalyst Shape of protein allows it to bond to specific molecules called substrates, causes a change in shape Examples maltase: breaks down maltose into 2 glucose lipase: breaks down lipids into fatty acids protease: breaks down proteins into amino acids **works best under certain temperatures or pH

13 Enzymes

14 Induced fit model Enzymes are specific http://www.phschool.com/science/biology_place/labben ch/lab2/induced.htmlhttp://www.phschool.com/science/biology_place/labben ch/lab2/induced.html http://highered.mcgraw- hill.com/sites/0072495855/student_view0/chapter2/ani mation__how_enzymes_work.htmlhttp://highered.mcgraw- hill.com/sites/0072495855/student_view0/chapter2/ani mation__how_enzymes_work.html

Download ppt "Proteins. What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins are."

Similar presentations

(carbon-based compounds)

(carbon-based compounds)
ORGANIC COMPOUNDS Carbohydrates Lipids Proteins Nucleic Acids.

ORGANIC COMPOUNDS Carbohydrates Lipids Proteins Nucleic Acids.
BIOCHEMISTRY (Ch. 5) Organic molecules Organic molecules Carbon based moleculesCarbon based molecules Inorganic molecules Inorganic molecules Non-carbon.

BIOCHEMISTRY (Ch. 5) Organic molecules Organic molecules Carbon based moleculesCarbon based molecules Inorganic molecules Inorganic molecules Non-carbon.
Diverse Macromolecules. V. proteins are macromolecules that are polymers formed from amino acids monomers A. proteins have great structural diversity.

Diverse Macromolecules. V. proteins are macromolecules that are polymers formed from amino acids monomers A. proteins have great structural diversity.
ProteiN proteiN – “N” stands for nitrogen. There is an “N” in the word proteiN The element Nitrogen is always present in proteiNs.

ProteiN proteiN – “N” stands for nitrogen. There is an “N” in the word proteiN The element Nitrogen is always present in proteiNs.
THE ROLE OF ENZYMES ENZYMES ARE “BOSSY” PROTEINS.

THE ROLE OF ENZYMES ENZYMES ARE “BOSSY” PROTEINS.
Lipids.  A class of molecules that is hydrophobic  Hydrophobic= water fearing Ex.  Fats  Oils  Steroids.

Lipids.  A class of molecules that is hydrophobic  Hydrophobic= water fearing Ex.  Fats  Oils  Steroids.
Proteins. involved in EVERYTHING! – structural AND functional (enzymes = most important) tens of thousands of different proteins – each has a specific.

Proteins. involved in EVERYTHING! – structural AND functional (enzymes = most important) tens of thousands of different proteins – each has a specific.
Proteins!. Proteins Proteins account for more than 50% of the dry mass of most cells Monomer: amino acids 20 amino acids used in cells Central carbon.

Proteins!. Proteins Proteins account for more than 50% of the dry mass of most cells Monomer: amino acids 20 amino acids used in cells Central carbon.
AP Biology 2005-2006 Proteins. AP Biology 2005-2006 Proteins  Most structurally & functionally diverse group of biomolecules  Function:  involved in.

AP Biology Proteins. AP Biology Proteins  Most structurally & functionally diverse group of biomolecules  Function:  involved in.
Organic Compounds Must have carbon & usually bonded to other carbon atoms. May contain hydrogen, oxygen, sulfur, nitrogen & phosphorus. Four main classes.

Organic Compounds Must have carbon & usually bonded to other carbon atoms. May contain hydrogen, oxygen, sulfur, nitrogen & phosphorus. Four main classes.
Biochemistry the study of chemical reactions of living things.

Biochemistry the study of chemical reactions of living things.
AP Biology Discuss the following with your group and be prepared to discuss with the class 1. Why is the shape of a molecule important? 2. How is a covalent.

AP Biology Discuss the following with your group and be prepared to discuss with the class 1. Why is the shape of a molecule important? 2. How is a covalent.
Proteins. What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins.

Proteins. What are proteins? Chain of molecules of Amino Acids called a polypeptide chain Found in: muscle, hormones, enzymes Monomers of proteins.
Mrs. Boorom’s MACROMOLECULE/ ENZYME Test Review Jeopardy Style!

Mrs. Boorom’s MACROMOLECULE/ ENZYME Test Review Jeopardy Style!
 Organic compound = compound that contains carbon  Except: ◦ CO 2 ◦ CO.

 Organic compound = compound that contains carbon  Except: ◦ CO 2 ◦ CO.
BIOLOGICALLY IMPORTANT MACROMOLECULES PROTEINS. A very diverse group of macromolecules characterized by their functions: - Catalysts - Structural Support.

BIOLOGICALLY IMPORTANT MACROMOLECULES PROTEINS. A very diverse group of macromolecules characterized by their functions: - Catalysts - Structural Support.
Proteins A protein is a compound made of small carbon compounds called AMINO ACIDS There are 20 different kinds of AMINO ACIDS.

Proteins A protein is a compound made of small carbon compounds called AMINO ACIDS There are 20 different kinds of AMINO ACIDS.
1 Proteins & Enzymes Ms. Dunlap. DO NOW! 5 MIN SILENTLY! 1. What are the 4 Macromolecules? 2. Enzymes are a part of which macromolecules? 3. What do you.

1 Proteins & Enzymes Ms. Dunlap. DO NOW! 5 MIN SILENTLY! 1. What are the 4 Macromolecules? 2. Enzymes are a part of which macromolecules? 3. What do you.
1 Proteins Proteins are polymers made of monomers called amino acids All proteins are made of 20 different amino acids linked in different orders Proteins.

1 Proteins Proteins are polymers made of monomers called amino acids All proteins are made of 20 different amino acids linked in different orders Proteins.

Similar presentations

Ads by Google