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1vrv

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[[Image:1vrv.gif|left|200px]]
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{{STRUCTURE_1vrv| PDB=1vrv | SCENE= }}
{{STRUCTURE_1vrv| PDB=1vrv | SCENE= }}
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'''Structure of phosphorylated IIB (C384(SEP)) domain of the mannitol-specific permease enzyme II'''
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===Structure of phosphorylated IIB (C384(SEP)) domain of the mannitol-specific permease enzyme II===
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==Overview==
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The solution structure of a stably phosphorylated form of the cytoplasmic B domain of the mannitol-specific transporter (IIB(Mtl)) of the Escherichia coli phosphotransferase system, containing a mutation of the active site Cys384 to Ser, has been solved by NMR. The strategy employed relies principally on backbone residual dipolar couplings recorded in three different alignment media, supplemented by nuclear Overhauser enhancement data and torsion angle restraints related specifically to the active site loop (residues 383-393). As judged from the dipolar coupling data, the remainder of the structure is unchanged upon phosphorylation within the errors of the coordinates of the previously determined solution structure of unphosphorylated wild-type IIB(Mtl). Thus, only the active site loop was refined. Phosphorylation results in a backbone atomic rms shift of approximately 0.7 angstroms in the active site loop. The resulting conformation is less than 0.5 angstroms away from the equivalent P-loop in both the low and high molecular mass eukaryotic tyrosine phosphatases. 3J(NP) coupling constant measurements using quantitative J-correlation spectroscopy provide a direct demonstration of a hydrogen bond between the phosphoryl group and the backbone amide of Ser391 at position i + 7 from phospho-Ser384, with an approximately linear P-O-H(N) bond angle. The structure also reveals additional hydrogen bonding interactions involving the backbone amides of residues at positions i + 4 and i + 5, and the hydroxyl groups of two serine residues at positions i + 6 and i + 7 that stabilize the phosphoryl group.
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(as it appears on PubMed at http://www.pubmed.gov), where 16219324 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16219324}}
==About this Structure==
==About this Structure==
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1VRV is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli_o157:h7 Escherichia coli o157:h7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VRV OCA].
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1VRV is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli_o157:h7 Escherichia coli o157:h7]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VRV OCA].
==Reference==
==Reference==
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[[Category: Sugar transport]]
[[Category: Sugar transport]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 12:50:56 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 17:37:58 2008''

Revision as of 14:38, 27 July 2008

Image:1vrv.png

Template:STRUCTURE 1vrv

Structure of phosphorylated IIB (C384(SEP)) domain of the mannitol-specific permease enzyme II

Template:ABSTRACT PUBMED 16219324

About this Structure

1VRV is a Single protein structure of sequence from Escherichia coli o157:h7. Full experimental information is available from OCA.

Reference

Visualization of the phosphorylated active site loop of the cytoplasmic B domain of the mannitol transporter II(Mannitol) of the Escherichia coli phosphotransferase system by NMR spectroscopy and residual dipolar couplings., Suh JY, Tang C, Cai M, Clore GM, J Mol Biol. 2005 Nov 11;353(5):1129-36. Epub 2005 Sep 28. PMID:16219324

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