1ne3

File:1ne3.gif

Solution structure of ribosomal protein S28E from Methanobacterium Thermoautotrophicum. Ontario Centre for Structural Proteomics target MTH0256_1_68; Northeast Structural Genomics Target TT744

Overview

The ribosomal protein S28E from the archaeon Methanobacterium thermoautotrophicum is a component of the 30S ribosomal subunit. Sequence homologs of S28E are found only in archaea and eukaryotes. Here we report the three-dimensional solution structure of S28E by NMR spectroscopy. S28E contains a globular region and a long C-terminal tail protruding from the core. The globular region consists of four antiparallel beta-strands that are arranged in a Greek-key topology. Unique features of S28E include an extended loop L2-3 that folds back onto the protein and a 12-residue charged C-terminal tail with no regular secondary structure and greater flexibility relative to the rest of the protein. The structural and surface resemblance to OB-fold family of proteins and the presence of highly conserved basic residues suggest that S28E may bind to RNA. A broad positively charged surface extending over one side of the beta-barrel and into the flexible C terminus may present a putative binding site for RNA.

About this Structure

1NE3 is a Single protein structure of sequence from Methanothermococcus thermolithotrophicus. Full crystallographic information is available from OCA.

Reference

Solution structure of ribosomal protein S28E from Methanobacterium thermoautotrophicum., Wu B, Yee A, Pineda-Lucena A, Semesi A, Ramelot TA, Cort JR, Jung JW, Edwards A, Lee W, Kennedy M, Arrowsmith CH, Protein Sci. 2003 Dec;12(12):2831-7. PMID:14627743 Page seeded by OCA on Sat May 3 02:25:18 2008

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