AssignFit: a program for simultaneous assignment and structure refinement from solid-state NMR spectra.

ABSTRACT: AssignFit is a computer program developed within the XPLOR-NIH package for the assignment of dipolar coupling (DC) and chemical shift anisotropy (CSA) restraints derived from the solid-state NMR spectra of protein samples with uniaxial order. The method is based on minimizing the difference between experimentally observed solid-state NMR spectra and the frequencies back calculated from a structural model. Starting with a structural model and a set of DC and CSA restraints grouped only by amino acid type, as would be obtained by selective isotopic labeling, AssignFit generates all of the possible assignment permutations and calculates the corresponding atomic coordinates oriented in the alignment frame, together with the associated set of NMR frequencies, which are then compared with the ex

SUBMITTER: Tian Y 

PROVIDER: S-EPMC3257385 | biostudies-literature | 2012 Jan

REPOSITORIES: biostudies-literature