BIOINORGANIC CHEMISTRY A Short Course Second Edition

SR Membrane

M7 - M10

green

M1 - M2 magenta

M3 - M6 orange

Domain A, 1-43, 124-235

yellow

Domain N, 360-600

red

Domain P, 330-359, 601-739

blue

Calcium ions

Cytoplasm

Lumen

H 2 O

Ca2+

glu309

ile307

val304

asn768 ala305

glu771

glu908

thr799

asp800 asn796

PDB: 1SU4

Figure 6.29 Ca 2+ - ATPase in the Ca 2 E 1 state as represented by the PDB: 1SU4 X - ray
crystallographic structure. Visualized using CambridgeSoft Chem3D Ultra 10.0 with
notations in ChemDraw Ultra 10.0. (Printed with permission of CambridgeSoft
Corporation.)

Figure 6.30 The calcium ion coordination sphere for the Ca 2+ - ATPase as represented
by the PDB: 1SU4 X - ray crystallographic structure. Visualized using The PyMOL
Molecular Graphics System and ChemDraw Ultra, version 10.0. (Printed with permis-
sion of Delano Scientifi c, LLC and CambridgeSoft Corporation.)