C15 intracellular compartments Flashcards
What formed ER membrane
invagination of plasma membrane
Organelles import proteins from cytosol through ?
protein translocators
Newly synthesized proteins are directed to proper locations by ?
signal sequences
Nuclear transport through nuclear pore summary
nuclear transport receptor hydrolyzes GTP to bind cargo protein. nuclear pore fibrils attach to receptor and assist in pulling cargo in. GTP binds to receptor releasing cargo. receptor leaves nucleus.
Protein import into chloroplast and mitochondria require ?
signal sequence and energy to unfold protein
Are used to direct mitochondrial and chloroplast proteins to appropriate cellular loaction
targeting sequences
Proteins destined for ER contain signal sequence at ? terminal
N termnal
Uses ER signal to direct ribosome to ER membrane
signal recognition particle
signal sequences are removed using ?
signal peptidase
transmembrane proteins require ? or ? signals
stop-transfer or internal start-transfer
SNARE proteins
target vesicles to the right organelle. complementary v and t snares bind to each other
protein glycosylation
carbohydrates added as proteins are synthesized across ER.
modifications in golgi
carbohydrates added in ER removed. other carbs added. other modifications. aggregate and packed into vesicles.
constitutive secretion
unregulated vesicle membrane fusion
pinocytosis
ingestion of fluid and molecules via small vesicles
