G-protein-coupled receptors (GPCRS) all have a similar cture nains. When a GPCR binds an extracellular signal, an acellular G protein, composed of units, becomes activated. with transmembrane of the G-

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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A. adenylyl
cyclase
E. ATP
B. cholera toxin
C. GTPase
D. AMP
G. Ca²"
K. four
2+
F. ATPase
Н. САМР
L. GDP
I. diacylglycerol
М. GTP
J. five
N. Phosphodiesterase
O. seven
P. Three
Q. twelve
R. Two
1. G-protein-coupled receptors (GPCRS) all have a similar
transmembrane
structure
with
domains. When a GPCR binds an extracellular signal, an
intracellular G protein, composed of
subunits, becomes activated.
protein subunits are tethered to the plasma membrane by short
lipid tails. When unstimulated, the a subunit is bound to
of the G-
which
is
exchanged
for
on
stimulation.
The
intrinsic
activity of the a subunit is important
inhibits
for inactivating the G protein.
this activity of the a subunit, thereby keeping the subunit in an
active state.
Transcribed Image Text:Word Bank: A. adenylyl cyclase E. ATP B. cholera toxin C. GTPase D. AMP G. Ca²" K. four 2+ F. ATPase Н. САМР L. GDP I. diacylglycerol М. GTP J. five N. Phosphodiesterase O. seven P. Three Q. twelve R. Two 1. G-protein-coupled receptors (GPCRS) all have a similar transmembrane structure with domains. When a GPCR binds an extracellular signal, an intracellular G protein, composed of subunits, becomes activated. protein subunits are tethered to the plasma membrane by short lipid tails. When unstimulated, the a subunit is bound to of the G- which is exchanged for on stimulation. The intrinsic activity of the a subunit is important inhibits for inactivating the G protein. this activity of the a subunit, thereby keeping the subunit in an active state.
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