Unit 1 - Topic 2 - Proteins - Section B - The synthesis and transport of proteins - Part IV - The secretory pathway Flashcards

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1
Q

Where are secreted proteins translated

A

Secreted proteins are translated in ribosomes
on the RER and enter its lumen

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2
Q

Examples of secreted proteins

A

Peptide hormones and digestive enzymes

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3
Q

Where do the proteins go and what happens to them after this

A

The proteins move through the Golgi apparatus and are then packaged into secretory vesicles

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4
Q

These vesicles move to and fuse with the and what does it release

A

These vesicles move to and fuse with the plasma membrane, releasing the proteins out of the cell

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5
Q

What are many secreted proteins synthesised as

A

Many secreted proteins are synthesised as inactive precursors and require proteolytic cleavage to produce active proteins

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6
Q

What is proteolytic cleavage and what are digestive enzymes an example of

A

Another type of post-translational modification. Digestive enzymes are one example of secreted proteins that require proteolytic cleavage to become active.

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