PROTEIN. By: Shamsul Azahari Zainal Badari Department of Resource Management and Consumer Studies Faculty of Human Ecology UPM
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1 PROTEIN By: Shamsul Azahari Zainal Badari Department of Resource Management and Consumer Studies Faculty of Human Ecology UPM
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3 OBJECTIVES OF THE LECTURE By the end of this lecture, student can: Define what is protein Explain the structure, roles and metabolism of protein Explain the impact of deficiency and excessive intake of protein
4 PROTEIN Protein contains atoms Carbon (C) hidrogen (H), oxygen (O) and Nitrogen (N). Nitrogen atoms give the name amino to the amino acids side group varies O H N C C O H amino group H H acid group
5 Amino acids have the basic structure: A central carbon atom with a hydrogen (H) and amino group (NH2) and acid group (COOH). 20 type acids amino. The simplest amino acid is glycine (one hydrogen). The slightly more complex amino acid is alanina (extra carbon with three hydrogen).
6 ACID AMINO STRUCTURE
7 Amino Acids Essential A.A Histidine Isoleucine Leucine Lysine Methionine Phenylalanine Threonine Tryptophan Valine Nonessential A.A: Alanine Arginine Aspargine Aspartic acid Cysteine Glutamic acid Glutamine Glycine Proline Serine Tyrosine
8 Acid Amino Structure
9 Amino Acids Essential Amino Acids (EAA) Amino acids that the body cannot make at all or cannot make in sufficient quantity to meet its needs. It must supply from the diet. Non-essential Amino Acids (NON-EAA) Body can synthesize itself, but food also can deliver nonessential amino acids.
10 Protein Each amino acid is connected to the next by a peptide bond Is a bond that connects the acid end of one amino with the amino end of another, forming a link in a protein chain. Dipeptides bond Two amino acids bonded together Tripeptides Three amino acids bonded together Polypeptides Many (ten or more) amino acids bonded together. Oligopeptides An intermediate string of four to nine amino acids
11 PEPTIDE BOND
12 Types of Protein Complete and incomplete proteins. Complete: a dietary protein containing all the EAA in relatively the same amount that human being require. Its may also contain Non-EAA Incomplete: EAA found in the shortest supply relatively to the amount needs in human body. Lysine Methionine Threonine Tryptophan Natural and unnatural proteins. Natural: Protein natural from environment Unnatural protein : Protein already change the structure due to physical factors -heat
13 Types of Protein Simple and conjugate proteins Simple: contain only amino acid Conjugate: combination amino acids with other elements Nucleoprotein= Protein + Nucleic acids (RNA & DNA) Lipoprotein = Lipid + Protein Glycoprotein = Carbohydrate + protein
14 Collagen Collagen is a type of protein. Fibrous in nature, it connects and supports bodily tissues, such as skin, bone, tendons, muscles, and cartilage. internal organs, teeth. More than 25 types Gives body tissues form and provides firmness and strength; elastin, flexibility. It is used in some cosmetic surgery procedures and is sold as a supplement created for joint mobility. Treating and managing serious burnscreating man-made skin substitutes.
15 Collagen
16 Proteins Turnover
17 Role of Protein Growth and maintenance Protein form integral parts of most body structures such as skin, tendons, membranes, muscles, organ and bones. Support the growth and repair of the body tissues. Enzymes Proteins facilitate chemical reactions Hormones Proteins regulate body processes Antibodies Proteins inactive foreign invaders, thus protecting the body against diseases
18 Role of Protein Fluid Balance Proteins help to maintain the volume and composition of body fluids Edema : cause by decrease plasma protein Acids-Base balance. Proteins help maintain the acid-base balance of fluids by acting as buffers Transportation Proteins transport substance, such as lipid, vitamins, minerals and oxygen around the body. Energy Proteins provide some fuel for the body s energy needs.
19 Health Problem Related to Protein (Marasmus)
20 Kwashiorkor
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25 THANK YOU
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