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Basic informartion about proteins

Eliška Hrežová

on 20 October 2013

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Transcript of Proteins

PROTEINS Outline terms and questions
structure of proteins
functions of proteins
proteins in food
discussion Terms Questions

There are 20 AA’s found
in the body.
Non-essential AA’s can be made by the body
Essential AA’s must be supplied by the diet

The essential AA’s are as follows:
Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, and Valine 1. primary

2. secondary

3. tertiary

4. quaternary Structure Function of proteins Build and repair tissue tissue in the body consists of proteins:
strung together to form muscle, skin and bodily organs

Damaged tissue needs proteins to help repair the injury!

people should consume:
two to three servings of protein-rich foods per day Synthesis of an enzymes Enzymes are proteins!

catalyze all processes in the body Balance of fluid
proteins carry an electrical charge, and their levels in the blood and interstitial fluid

Hormones released:
by the nervous system Provide energy consume enough protein and carbohydrates-> keep your heart and muscles in shape

it's recommended:
adult women take in 46 g of protein per day
adult males consume 56 g per day Chemical messenger Immune function Transport vehicle Acid-base balance Weight management Insufficiency hypoalbuminemia malnutrition sickle cell disease (anemia) phenylketonuria marasmus Proteins in food Answers Complete all essential AAs Incomplete absence of some essential AAs Complementing foods incomplete + incomplete = complete grains and legumes
grains and dairy
legumes and seeds It is necessary to eat complementary food during a single meal, but
it necessary to eat it within the same day. NOT IS indentifies and destroys bacteries and viruses Immunoglobulin produced by B-lymphocytes 5 classes of immunoglobulin IgG
IgD some hormones are proteins insuline: glucagon: increasses the level of glucose reduces blood glucose You have to inject insuline, because of it is protein!
rapid growth:
infancy 2 g/kg,
adolescence 1g/kg

rapid development:
endurance athletes: 1,2 to 1,4 g/kg,
injury and repair 1,5 to 2 g/kg Discussion bilirubin, steroidal agents, haem, FA, drugs, metals, vitamins, ... ALBUMIN TRANSFERRIN apotrasferrin + 2 Fe = transferrin MYOGLOBIN O2 1. What kinds of molecules are made up proteins?

2. How can we divide amino acids?

3. Name some functions of proteins.

4. What kind of illnesses you can suffer because of proteins insufficiency?
expel 1. amino acids
2. essential and non-essential
3. build and repair tissue, synthesis of an enzymes, balance of fluid, provide energy, chemical messenger, transport vehicle, immune function
4. marasmus, hypoalbuminemia malnutrition, sickle cell disease (anemia), phenylketonuria
5. animal foods - meat, milk, eggs, cheese Provide energy ANTIBODIES acidosis, alkalosis coma or death PROTEIN BUFFERS acids - positive + proteins - negative NEUTRALIZATION kwashiorkor proteins increase:
thermogenesis 5. Name best sources of complete proteins. Can we eat insuline and still ensure its effect? essential and non-essential A vegetarian diet doesn't have enough protein, and is therefore unhealthy. Too much protein is as harmful as too little. Vegetarianism is dangerous for children.
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