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1l4s

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[[Image:1l4s.gif|left|200px]]
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[[Image:1l4s.png|left|200px]]
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{{STRUCTURE_1l4s| PDB=1l4s | SCENE= }}
{{STRUCTURE_1l4s| PDB=1l4s | SCENE= }}
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'''Solution structure of ribosome associated factor Y'''
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===Solution structure of ribosome associated factor Y===
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==Overview==
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Escherichia coli protein Y (pY) binds to the small ribosomal subunit and stabilizes ribosomes against dissociation when bacteria experience environmental stress. pY inhibits translation in vitro, most probably by interfering with the binding of the aminoacyl-tRNA to the ribosomal A site. Such a translational arrest may mediate overall adaptation of cells to environmental conditions. We have determined the 3D solution structure of a 112-residue pY and have studied its backbone dynamic by NMR spectroscopy. The structure has a betaalphabetabetabetaalpha topology and represents a compact two-layered sandwich of two nearly parallel alpha helices packed against the same side of a four-stranded beta sheet. The 23 C-terminal residues of the protein are disordered. Long-range angular constraints provided by residual dipolar coupling data proved critical for precisely defining the position of helix 1. Our data establish that the C-terminal region of helix 1 and the loop linking this helix with strand beta2 show significant conformational exchange in the ms- micro s time scale, which may have relevance to the interaction of pY with ribosomal subunits. Distribution of the conserved residues on the protein surface highlights a positively charged region towards the C-terminal segments of both alpha helices, which most probably constitutes an RNA binding site. The observed betaalphabetabetabetaalpha topology of pY resembles the alphabetabetabetaalpha topology of double-stranded RNA-binding domains, despite limited sequence similarity. It appears probable that functional properties of pY are not identical to those of dsRBDs, as the postulated RNA-binding site in pY does not coincide with the RNA-binding surface of the dsRBDs.
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{{ABSTRACT_PUBMED_12392550}}
==About this Structure==
==About this Structure==
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1L4S is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L4S OCA].
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1L4S is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L4S OCA].
==Reference==
==Reference==
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[[Category: Ye, K.]]
[[Category: Ye, K.]]
[[Category: Ribosome binding protein]]
[[Category: Ribosome binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:32:20 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 11:42:05 2008''

Revision as of 08:42, 2 July 2008

Image:1l4s.png

Template:STRUCTURE 1l4s

Solution structure of ribosome associated factor Y

Template:ABSTRACT PUBMED 12392550

About this Structure

1L4S is a Single protein structure of sequence from Escherichia coli. Full experimental information is available from OCA.

Reference

Ribosome-associated factor Y adopts a fold resembling a double-stranded RNA binding domain scaffold., Ye K, Serganov A, Hu W, Garber M, Patel DJ, Eur J Biochem. 2002 Nov;269(21):5182-91. PMID:12392550

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