Fig. 3.

Capsomer arrangement of Mimivirus. Diagram showing the p6 plane group lattice of capsomers. Each monomer of the major capsid protein consists of two consecutive jelly-roll folds indicated by a kidney-shaped outline with the circle at one end representing the inserted ‘tower’ loop. Three monomers constitute one capsomer. The depressions along one edge are shown in green. Three fivefold vertices at the corners of a face are shown with red pentagons. As an example the fivefold vertices are placed five depressions apart. This would correspond to h = 5 and k = 5 in terms of the Caspar-Klug p3 plane group hexagonal array of capsomers (see blue axes). For Mimivirus, there are 19 depressions along an edge. One unit cell of the p6 (Mimivirus) and p3 (PBCV1) are outlined in yellow. The distance between depressions (140 Å) and between capsomers (81 Å) is shown in yellow. Reproduced from [5].