Protein Classification Based on Chemical Composition Flashcards
2 Types of Protein
- Simple Protein
2. Conjugated Protein
6 Types of Conjugated Proteins
- Nucleoprotein
- Chromoprotein
- Lipoprotein
- Mucoprotein
- Phosphoprotein
- Metalloproteins
5 Types of Simple Proteins
- Albumins
- Globulins
- Glutelins
- Prolamins
- Scleroproteins or Albuminoids
It is made up of amino acid subunits joined together by peptide bonds?
In hydrolysis they yield only the amino acids and occasional small carbohydrate compounds?
Simple Proteins
Composed of simple proteins include materials such as carbohydrates, lipids, bound metal ions, nonprotein substance (prosthetic group) and other organic groups.
Conjugated Proteins
READ: Albumins
• These are soluble in water and diluted in aqueous solution.
• Can be coagulated by heat and precipitated from solution using saturated ammonium sulfate.
coagulated means it can be form as solid
What do you called the albumin in egg?
Egg albumin
What do you called the albumin in milk?
Lactoalbumin or lactalbumin
What do you called the albumin in blood?
Serum albumin
What do you called the albumin in muscles?
Myogen
What do you called the albumin in peas?
Legumin
READ: Globulins
- These are insoluble in water but soluble in diluted salt solution.
- It can coagulated by heat, and precipitate using half salt saturated solution ammonium sulfate.
- Mostly it found in nuts.
What do you called the globulin in egg yolk?
Ovoglobulin
What do you called the globulin in muscles?
Myosin
What do you called the globulin in beans?
Phascolin
What do you called the globulin in almonds?
Amandin
What do you called the globulin in peanuts?
Arachin
READ: Glutelins
- These are soluble in diluted solution of acid and alkalies (bases).
- it is insoluble in water and neutral solvents
- It only occur in plants.
What do you called the glutelins in wheat?
Glutenin
What do you called the glutelins in rice?
Oryzenin
READ: Scleroproteins or Albuminoids
- These are insoluble in all neutral solvents, dilute acid and alkalies (bases).
- Entirely in animal proteins and constituents of exoskeletal structure connecting ang supporting fibrous tissues.
What do you called the albumin in hair, horn and nails?
Keratin
What do you called the albumin in bones?
Collagen
What do you called the albumin in silk?
Fibroin and Sericin
What do you called the albumin in our connective tissues?
Elastin
READ: Prolamins
- It is soluble in 70-80% of ROH
- But insoluble in absolute ROH, in water, and neutral solvents.
- Rich in Proline upon hydrolysis.
- Usually found in plants - mostly seeds
What do you called the prolamin in corn?
Zein
What do you called the prolamin in wheat?
Gliadine
What do you called the prolamin in barley?
Hordein
What do you called the prolamin in kafir corn?
Kafirin
READ: Nucleoprotein
- Composed with simple protein in salt combination with nucleic acids (prosthetic group)
- Most abundant in plant and animal tissues that have a large proportion to nuclear materials.
- Examples are yeast, asparagus tips, thymes, and other glandular organs such as organ and sperm.
READ: Mucoprotein or Mucoids
- Simple protein in combination with mucopolysaccharides.
- Present in tendons, bones, cartillages, and umbilical cord.
- Also present in all animal mucins and blood-group substances.
READ: Chromoproteins
- Simple protein in combination with colored prosthetic group. (Chroma means color)
- Hemoglobin - a respiratory proteins in which the prosthetic group in the iron-containing complex, heme. It is the iron-containing oxygen-transport metalloprotein in the red blood cells.
- Cytochromes - prosthetic group is heme
- Flavoproteins - prosthetic group is riboflavin.
- Retins - Prosthetic group is carotenoid pigment (in carrots)
- Catalase - it is enzyme that decomposes hydrogen peroxide (H2O2)
READ: Prosphoprotein
- Simple protein combined with phosphoric acid
* Examples are casein from milk and vitellin from egg yolk.
READ: Metalloprotein
• Enzyme protein containing metallic elements • Examples are: Fe - ferretin Zn - alcohol dehydrogenase Ca - calmodulin Mo - dinitrogenase Cu - plastocyatin
READ: Lipoprotein
- Proteins formed by combination of proteins with lipids such as lecithin and cephalin
- Soluble in organic solvents but insoluble in water.
- Phospholipid protein complex (lecithoprotein) - found in animal and plant such as milk, blood, cell nuclei, egg yolk etc.
- Also found in bacterial antigens and viruses