Determining methyl sidechain conformations in a CS-ROSETTA model using methyl ¹H-¹³C residual dipolar couplings.

ABSTRACT: Modelling of protein structures based on backbone chemical shifts, using programs such as CS-ROSETTA, is becoming increasingly popular, especially for systems where few restraints are available or where homologous structures are already known. While the reliability of CS-ROSETTA calculations can be improved by incorporation of some additional backbone NMR data such as those afforded by residual dipolar couplings or minimal NOE data sets involving backbone amide protons, the sidechain conformations are largely modelled by statistical energy terms. Here, we present a simple method based on methyl residual dipolar couplings that can be used to determine the rotameric state of the threefold symmetry axis of methyl groups that occupy a single rotamer, determine rotameric distributions, and iden

SUBMITTER: Karamanos TK 

PROVIDER: S-EPMC7083688 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature