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Protein Function

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Submitted By dnaday
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Protein Function
- Proteins are responsible for nearly every task of cellular life including;
• Cell shape
• Inner organization
• Product manufacture
• Waste cleanup
• Routine maintenance
How Diverse Are Proteins?

Here are two examples of proteins
Structural Proteins Enzymes
- Maintain cell shape (ex. Skeleton) - Catalyze the biochemical reactions that occur in cells.
- Compose structural elements in connective tissues like cartilage and bone in vertebrates.

- Proteins are sometimes altered after translation and folding are complete.
- This is called Transferees Enzymes

How Do Proteins Provide Structural Support for cells?
- The cytoplasm is highly structured because of proteins. This occurs particularly in eukaryotic cells.

Eukaryotic Cells and Proteins
Microtubules Actin filaments Intermediate filaments
• Play a major role in organizing the cytoplasm and in the distribution of organelles. • Are involved in various forms of cell movement, including cell locomotion, contraction of muscle cells, and cell division. • Are strong fibers that serve as architectural support inside cells.

How Do Proteins Aid the Biochemical Reactions of a Cell?
- Cells rely on thousands of different enzymes to catalyze metabolic reactions.
- Enzymes work by binding one or more substances, bringing them together so that a reaction can take place, and releasing them once the reaction is complete.
What Do Proteins Do in the Plasma Membrane?
- The proteins usually help the cell interact with its environment.
- Ex. Plasma membrane proteins carry out functions as diverse as ferrying nutrients across the plasma membrane, receiving chemical signals from outside the cell, translating chemical signals into intracellular action, and sometimes anchoring the cell in a particular location.
- Many proteins can move within...

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