Figure - PMC

Skip to main content

View full-text article in PMC

. Author manuscript; available in PMC: 2008 Apr 27.

Published in final edited form as: J Mol Biol. 2007 Feb 20;368(2):493–508. doi: 10.1016/j.jmb.2007.02.016

Coordination of the calcium ion in the DE loop of repeat in Ca²⁺-bound alpha-11 giardin. Calcium ions are represented as red spheres and water molecules as yellow spheres and the coordination between the calcium ion and oxygen atoms is shown as cyan dotted lines. (a) On the left hand side are the two helices (D and E) from monomer C and on the right hand side is helix E from monomer B (in purple). The coordination distances between the calcium ion in monomer C and the coordinating oxygen atoms (Ca-O) are as follows: Ca-O Lys53 2.83 Å, Ca-O Ile56 2.52 Å, Ca-OD1 Asn58 2.84 Å, Ca-OE1 Glu62 2.71 Å, Ca-O HOH3 2.63 Å and Ca-O Asp126 (monomer B) 2.98 Å. (b) Helices and loops from monomer D are shown in pink. The bond distances between the calcium ion in monomer D and the coordinating oxygen atoms (Ca-O) are as follows: Ca-O Lys53 2.76 Å, Ca-O Ile56 2.75 Å, Ca-OD1 Asn58 2.73 Å, Ca-OE1 Glu62 2.56 Å, Ca-O HOH5 2.89 Å and Ca-O HOH96 2.78 Å. Figures were produced with the programs Pymol [http://pymol.sourceforge.net/] and POVRAY [http://www.povray.org/].

Coordination of the calcium ion in the DE loop of repeat in Ca²⁺-bound alpha-11 giardin. Calcium ions are represented as red spheres and water molecules as yellow spheres and the coordination between the calcium ion and oxygen atoms is shown as cyan dotted lines. (a) On the left hand side are the two helices (D and E) from monomer C and on the right hand side is helix E from monomer B (in purple). The coordination distances between the calcium ion in monomer C and the coordinating oxygen atoms (Ca-O) are as follows: Ca-O Lys53 2.83 Å, Ca-O Ile56 2.52 Å, Ca-OD1 Asn58 2.84 Å, Ca-OE1 Glu62 2.71 Å, Ca-O HOH3 2.63 Å and Ca-O Asp126 (monomer B) 2.98 Å. (b) Helices and loops from monomer D are shown in pink. The bond distances between the calcium ion in monomer D and the coordinating oxygen atoms (Ca-O) are as follows: Ca-O Lys53 2.76 Å, Ca-O Ile56 2.75 Å, Ca-OD1 Asn58 2.73 Å, Ca-OE1 Glu62 2.56 Å, Ca-O HOH5 2.89 Å and Ca-O HOH96 2.78 Å. Figures were produced with the programs Pymol [http://pymol.sourceforge.net/] and POVRAY [http://www.povray.org/].