BIOLOGY 1A03 Lecture Notes - Lecture 3: Nuclear Pore, Globular Protein, Nuclear Membrane

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Transport proteins embedded in the cell membrane: move substance across membrane. Proteins can act as enzymes: speeds up synthesis of carbohydrates. Enzymes in mitochondria: allow for the release of stored energy from carbohydrates. Make up structure: moving cells, moving large cargo or molecules within cells. Actin and myosin- slide past each other in contractile bundles. Proteins embedded in cm important for cell to cell signalling: cytoplasmically situated proteins all for further amplification. Defence mechanisms: made by specialized immune cells, serve the role of antibodies that can destroy disease-causing viruses and bacteria. Proteins have different sizes and shape: structural difference relate to function. Tata-box binding protein, interacts with dna able to because of grooves in the protein. Porin proteins important for transport of water across cm, hydrophilic pore. Most soluble cellular proteins are globular, with hydrophobic interior and a hydrophilic exterior. Allows solubility in aqueous environment: eg hymglobin. Two representation of protein structures: space filling model.