Proteins 2 Flashcards
Give some examples of modified types of proteins?
Glycoproteins
Lipoproteins
Metalloproteins
What are glycoproteins?
Compound composed of protein and carbohydrates
How to glycoproteins occur?
From a post-translational modificaiton where a sugar molecule binds via an amino acid in the protein
What are some of the roles of glycoproteins?
Protein stabalisation
Affect solubility
Protein orientation
Signalling
Cell recognition
What is the process of forming a glycoprotein called?
Glycosylation
Where does glycosylation occur?
The endoplasmic reticulum and the golgi apparatus
What are some examples of glycoproteins?
Immunoglobulins
Blood group determinants
What are lipoproteins?
Proteins and lipids bonded together
What is the function of lipid proteins?
Transport insoluble fat and cholesterol in the blood
What are examples of lipoproteins?
High density lipoproteins (HDL)
Low density lipoproteins (LDL)
What are metalloproteins?
Protein molecules with a bound metal ion
What are some examples of metalloproteins?
Enzymes
Storage
Signilling
Transport
What are the three structures of proteins?
Globular (varied function)
Fibrous (structural function)
Membranous (associated with cell or orangelle membrane)
What are some examples of globular proteins?
Enzymes
Messengers (hormones)
Transporters
Stack of amino acids
Structural function such as actin or tubulin
What are some examples of fibrous proteins?
Bone matrices
Muscle fibres
Tendons
Connective tissue