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. 1992 Sep;11(9):3289–3295. doi: 10.1002/j.1460-2075.1992.tb05407.x

Interaction of the RNA-binding domain of the hnRNP C proteins with RNA.

M Görlach 1, M Wittekind 1, R A Beckman 1, L Mueller 1, G Dreyfuss 1
PMCID: PMC556863  PMID: 1380452

Abstract

The hnRNP C proteins are among the most abundant and avid pre-mRNA-binding proteins and they contain a consensus sequence RNA-binding domain (RBD) that is found in a large number of RNA-binding proteins. The interaction of the RBD of the hnRNP C proteins with an RNA oligonucleotide [r(U)8] was monitored by nuclear magnetic resonance (NMR). 15N and 13C/15N-labelled hnRNP C protein RBD was mixed with r(U)8 and one- and two-dimensional (1D and 2D) NMR spectra were recorded in a titration experiment. NMR studies of the uncomplexed 93 amino acid hnRNP C RBD (Wittekind et al., 1992) have shown that it has a compact folded structure (beta alpha beta beta alpha beta), which is typical for the RBD of this family of proteins and which is comprised of a four-stranded antiparallel beta-sheet, two alpha-helices and relatively unstructured amino- and carboxy-terminal regions. Sequential assignments of the polypeptide main-chain atoms of the hnRNP C RBD-r(U)8 complex revealed that these typical structural features are maintained in the complex, but significant perturbations of the chemical shifts of amide group atoms occur in a large number of residues. Most of these residues are in the beta-sheet region and especially in the terminal regions of the RBD. In contrast; chemical shifts of the residues of the well conserved alpha-helices, with the exception of Lys30, are not significantly perturbed. These observations localize the candidate residues of the RBD that are involved in the interaction with the RNA.(ABSTRACT TRUNCATED AT 250 WORDS)

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Selected References

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