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From DNA to Proteins

Marvelous Mussel Adhesive. Mussel binds itself to rocks with threads coated with the protein bysussGene for bysuss has been put into yeastYeast synthesize the protein based on the instructions in the mussel DNA. Proteins. Can form long strands that are very strongAlanine (an amino acid) can be t

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From DNA to Proteins

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Presentation Transcript

    1. From DNA to Proteins Chapter 14

    2. Marvelous Mussel Adhesive Mussel binds itself to rocks with threads coated with the protein bysuss Gene for bysuss has been put into yeast Yeast synthesize the protein based on the instructions in the mussel DNA

    3. Proteins Can form long strands that are very strong Alanine (an amino acid) can be tagged to research the atomic arrangement of spider silk. Some spider silk (orb weaver) can be as strong as kevlar Video Spider Silk

    4. Proteins Leptin is a protein that controls appetite, and therefore controls obesity Obesity happens because the protein leptin has malfunctioning receptors Video Looking at Leptin

    5. Same two steps produce all proteins: 1) DNA is transcribed to form RNA Occurs in the nucleus RNA moves into cytoplasm 2) RNA is translated to form polypeptide chains, which fold to form proteins Steps from DNA to Proteins

    6. Three Classes of RNAs Messenger RNA (mRNA) Carries protein-building instruction Made in the nucleus from a DNA template Moves through nuclear pore to the cytoplasm Ribosomal RNA (rRNA) Major component of ribosomes Made in the nucleolus Moves through the nuclear pore to the cytoplasm Connects with mRNA and tRNA to make proteins Transfer RNA (tRNA) Delivers free floating amino acids in cytoplasm to rRNA (2 subunits: small and large) Made in nucleus Moves through nuclear pore to the cytoplasm

    7. A Nucleotide Subunit of RNA

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