Proteins to Know

Question 1

Actin

Answer 1

forms microfilaments for shape and motility

Question 2

tubulin

Answer 2

forms microtubules for intracellular transport and mitotic spindle formation

Question 3

keratin

Answer 3

intermediate filament protein for mechanical stability in epithelial cells

Question 4

Virnetin

Answer 4

intermediate filament protein in messenchhymal cells

Question 5

dynein

Answer 5

motor protein for retorgrade transport along microtubules

Question 6

kinesin

Answer 6

motor protein for anterograde transport along microtubules

Question 7

mysoin

Answer 7

actin-associated motor protein for muscle contraction and intracellular transport

Question 8

SRP

Answer 8

guides ribosomes to the ER for protein synthesis

Question 9

Sec Protiens

Answer 9

form the translucon complex for protein translocation into the ER

Question 10

COP I

Answer 10

coat proteins for vesicle transport, golgi -> ER

Question 11

COP II

Answer 11

coat proteins for vesicle transport, ER -> golgi

Question 12

clathrin

Answer 12

involved in vesicle formation for endocytosis and transport betwee the golgi and lyosomes

Question 13

SNARE

Answer 13

mediate vesicle fusion with target memnranes

Question 14

phospholipases

Answer 14

modify membrane lipids

Question 15

peripheral membrane proteins

Answer 15

help anchor or interact with the membrane without spanning it

Question 16

GPCRs

Answer 16

detect extracellular signals and activate intracellular pathways

Question 17

RTKs

Answer 17

transmit growth factor signals

Question 18

G proteins

Answer 18

relay signals from GPRs

Question 19

protein kinases

Answer 19

phosphorylate proteins to regulate activity

Question 20

second messengers

Answer 20

amplify and relay signals

Question 21

transcription factors

Answer 21

regulate gene expression in response to signals