title: Ab initio high-resolution single-particle 3D reconstructions: the symmetry adapted functions way.
abstract: A protocol to attain high-resolution single-particle reconstructions is presented. The protocol is the concatenation of two procedures: one to obtain an ab initio low-resolution reconstruction, the other to determine a fixed point of the consecutive applications of fast projection matching and 3D reconstruction. It is a reciprocal space formulation where the Fourier coefficients of the 3D scattering density are expressed in terms of symmetry adapted functions and the 2D particle images are represented by their Fourier-Bessel transforms. The new protocol shows advantages in terms of speed and accuracy when compared to other methods currently in use. We illustrate its performance as applied to high-resolution cryo-electron micrographs of rotavirus.
authors.affiliation: EMBL-Grenoble, 6 rue Jules Horowitz, BP 181, F-38042 Grenoble Cedex 9, France. estrozi@embl.fr
authors.forename: Leandro F
authors.initials: LF
authors.lastname: Estrozi
authors.forename: Jorge
authors.initials: J
authors.lastname: Navaza
mesh_terms: D020285:Cryoelectron Microscopy / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008962:Models, Theoretical