Figure 4.
Figure 4. Interactions of helix F and its descending loop
with sheet A. C^a traces for (a) intact egg white ovalbumin and
for (b) P1-P1' cleaved R339T are shown in white except that the
reactive center loop or inserted b-strand is represented in
orange. The main chain atoms involved in hydrogen bonds are
shown in the standard colors. The side-chain groups of Arg104,
Trp148, Lys290 and Gln325 are shown in red, yellow, blue and
green, respectively. The indole plane of Trp148 and the plane
formed by the N epsilon
, C^z, Nr1, and Nr2 atoms of Arg104 intersect with dihedral
angles of 12.7 ° and 10.2 ° in the intact and cleaved
forms, respectively. The shortest distance between the two
planes are 3.3 Å for the Arg104-Nr1 to Trp148-N1 distance
in intact ovalbumin and 3.1 Å for the Arg104-Nr1 to
Trp148-C^d1 distance in cleaved R339T.
The above figure is reprinted
by permission from Elsevier:
J Mol Biol
(2002,
315,
113-120)
copyright 2002.
epsilon
, C^z, Nr1, and Nr2 atoms of Arg104 intersect with dihedral
angles of 12.7 ° and 10.2 ° in the intact and cleaved
forms, respectively. The shortest distance between the two
planes are 3.3 Å for the Arg104-Nr1 to Trp148-N1 distance
in intact ovalbumin and 3.1 Å for the Arg104-Nr1 to
Trp148-C^d1 distance in cleaved R339T.