|
|
|
|
![]() Other Issues: |
October 2000; 58 (4)
[Index by Author]
[Cover Caption]
|
||||||
About the cover: Model of the receptor-G protein complex.
The G protein heterotrimer is an
t/
i1 chimera complexed with
t
t (Lambright et al., 1996). The receptor
model is the MII rhodopsin model (Pogozheva et al., 1997). Positioning
of the heterotrimer relative to the receptor is based on the model in
Bourne (1997). The GTPase domain of the
-subunit is light blue. The
helical domain of the
-subunit is pink. The GDP is yellow. Switch I
is dark blue, switch II is green, and switch III is magenta. The
2/
4 loop is yellow, the
3/
5 loop is orange, and the
4/
6 loop is red. The carboxyl terminus (labeled C) of the
-subunit is magenta. Selected regions of secondary structure in the
-subunit, including the amino-terminal
-helix (
N), are
indicated. The
-strands of the
-subunit are orange, and the
amino-terminal helix and connecting loops are yellow. the
-subunit
is white. Receptor helices are numbered, and those connected to each
other by an intracellular loop are the same color. These figures were drawn using MidasPlus, developed by the Computer Graphics Laboratory at
the University of California at San Francisco. From Grishna G and
Berlot CH (2000) A surface-exposed region of Gs
in which
substitutions decrease receptor-mediated activation and increase
receptor affinity. Mol Pharmacol
57:1081-1092.