Describe 3 ways to determine whether a protein is a
transmembrane or peripheral protein.
Describe 3 ways to determine whether a protein is a
transmembrane or peripheral protein.
Solutions
Expert Solution
In transmembrane protein Hydrobhobic aminoacids are more as
compared to hydrophilic amino acid and reverse is true for
peripheral protein
Peripheral protein is attached to plasma membrane from one end
so only that end contain hydrophobic amino acids other amino acids
are present in extra cellular fluid so those amino acid must be
hydrophilic and In case of transmembrane protein almost complete
protein embedded in the plasma membrane so almost all amino acids
are hydrophobic amino acid to interact with the phospholipid
bilayer.
Peripheral proteins are loosely attached to the plasma membrane
so peripheral proteins dissociate following treatment with a polar
reagent or high salt concentrations and trans-membrane proteins
embedded inside the membrane so can not seperated easily,
transmembrane proteins can be seprated from the biological membrane
only with detergents, nonpolar solvents , denaturing agents.
2. Describe the subcellular scheme by which a transmembrane cell
surface receptor protein such as the platelet derived growth factor
receptor gets synthesized and placed at the cell surface. Start
with a gene (DNA) but focus primarily on cellular endomembrane
systems.
Draw by hand a 3 pass transmembrane protein of your own creation
(not a known one) through a plasma membrane. In your drawing
clearly draw and label: The plasma membrane and the extracellular
and cytosolic side The C and N terminus All the regions where you
expect to find higher proportions of polar amino acids All the
regions where you expect to find higher proportions of nonpolar
amino acids.
explain how the three-dimensional structure of a cytosolic protein
differs from a transmembrane protein in terms of the amino acid
distribution and folding.
Complex III is
an integral membrane protein
a peripheral membrane protein
involved in active transport of H+
involved in redox reaction
a, c, and d are correct
Draw a transmembrane protein (as a cartoon) that functions in
the Plasma Membrane. Draw the path for its production and
deposition. The transmembrane protein must have 3 N- linked
glycosylations and 2 O-linked glycosylations. For the N and O
linked glycosylations the saccharide units should be cartoons –
geometric shapes).Draw how the above transmembrane protein is bound
by a receptor from another cell. The picture should include the
structure of the terminal saccharide(s) that is /are contained on
your transmembrane...
Bacteriorhodopsin is a protein found in Halobacterium
halobium that converts light energy into a transmembrane
proton gradient that is used for ATP synthesis. After light is
absorbed by the protein, the following initial reaction sequence
occurss:
Br -----> J -----> K where: k1
= 2.0 x 10^12
s^-1 and k2 = 3.3 x
10^11 s^-1
Construct plots of the concentration of each species versus time
in excel. Please show all steps and data plugged into excel.
What are the levels of protein structure for the Cystic Fibrosis
Transmembrane conductance regulator? Including primary, secondary,
tertiary, and quaternary.