NMR paper NMR structure of the N-terminal domain of Saccharomyces cerevisiae RNase HI reveals a

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[NMR paper] NMR structure of the N-terminal domain of Saccharomyces cerevisiae RNase HI reveals a

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11-18-2010, 08:31 PM

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NMR structure of the N-terminal domain of Saccharomyces cerevisiae RNase HI reveals a

NMR structure of the N-terminal domain of Saccharomyces cerevisiae RNase HI reveals a fold with a strong resemblance to the N-terminal domain of ribosomal protein L9.

Related Articles NMR structure of the N-terminal domain of Saccharomyces cerevisiae RNase HI reveals a fold with a strong resemblance to the N-terminal domain of ribosomal protein L9.

J Mol Biol. 1999 Aug 20;291(3):661-9

Authors: Evans SP, Bycroft M

In addition to the conserved and well-defined RNase H domain, eukaryotic RNases HI possess either one or two copies of a small N-terminal domain. The solution structure of one of the N-terminal domains from Saccharomyces cerevisiae RNase HI, determined using NMR spectroscopy, is presented. The 46 residue motif comprises a three-stranded antiparallel beta-sheet and two short alpha-helices which pack onto opposite faces of the beta-sheet. Conserved residues involved in packing the alpha-helices onto the beta-sheet form the hydrophobic core of the domain. Three highly conserved and solvent exposed residues are implicated in RNA binding, W22, K38 and K39. The beta-beta-alpha-beta-alpha topology of the domain differs from the structures of known RNA binding domains such as the double-stranded RNA binding domain (dsRBD), the hnRNP K homology (KH) domain and the RNP motif. However, structural similarities exist between this domain and the N-terminal domain of ribosomal protein L9 which binds to 23 S ribosomal RNA.

PMID: 10448044 [PubMed - indexed for MEDLINE]

Source: PubMed

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