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Endocytic and biosynthetic-secretory pathways

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Presentation on theme: "Endocytic and biosynthetic-secretory pathways"— Presentation transcript:

1 Endocytic and biosynthetic-secretory pathways
(Ten or more chemically distinct, membrane-enclosed compartments) Transport vesicles

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4 The biosynthetic-secretory and endocytic pathways

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9 Various types of coated vesicles
Golgi apparatus Plasma ER and Golgi Cisternae

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11 Assembly of a clathrin coat
Coated pits and vesicles on the cytosolic surface of membranes 36 triskelions 12 pentagons 6 hexagons triskelion Inner layer binds adaptins Freeze-etch

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13 GTPases function in vesicle formation
GAP = GTPase Activating Protein GEF = Guanine Nucleotide Exchange Factor

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24 Dynamin pinches of the vesicles
GTPase Shibire mutant has coated pits but no budding off of synaptic vesicles

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36 The entry of enveloped viruses into cells
HIV Similar to SNAREs

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