1pbp

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{{STRUCTURE_1pbp| PDB=1pbp | SCENE= }}
{{STRUCTURE_1pbp| PDB=1pbp | SCENE= }}
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'''FINE TUNING OF THE SPECIFICITY OF THE PERIPLASMIC PHOSPHATE TRANSPORT RECEPTOR: SITE-DIRECTED MUTAGENESIS, LIGAND BINDING, AND CRYSTALLOGRAPHIC STUDIES'''
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===FINE TUNING OF THE SPECIFICITY OF THE PERIPLASMIC PHOSPHATE TRANSPORT RECEPTOR: SITE-DIRECTED MUTAGENESIS, LIGAND BINDING, AND CRYSTALLOGRAPHIC STUDIES===
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==Overview==
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Phosphorous, primarily in the form of phosphate, is a critical nutrient for the life of a cell. We have previously determined the 1.7-A resolution structure of the phosphate-binding protein, an initial receptor for the high-affinity phosphate active transport system or permease in Escherichia coli (Luecke, H., and Quiocho, F.A. (1990) Nature 347, 402-406). This structure is the first to reveal the key role of hydrogen bonding interactions in conferring the high specificity of the permease, a specificity also shared by other phosphate transport systems. Both monobasic and dibasic phosphates are recognized by the phosphate-binding protein with Asp56 playing a key role. Here we report site-directed mutagenesis, ligand binding, and crystallographic studies of the binding protein which show that introduction of one additional Asp by mutagenesis of the Thr141 in the ligand-binding site restricts binding to only the monobasic phosphate.
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{{ABSTRACT_PUBMED_7929197}}
==About this Structure==
==About this Structure==
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[[Category: Wang, Z.]]
[[Category: Wang, Z.]]
[[Category: Phosphate transport]]
[[Category: Phosphate transport]]
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Revision as of 10:18, 27 July 2008

Image:1pbp.png

Template:STRUCTURE 1pbp

FINE TUNING OF THE SPECIFICITY OF THE PERIPLASMIC PHOSPHATE TRANSPORT RECEPTOR: SITE-DIRECTED MUTAGENESIS, LIGAND BINDING, AND CRYSTALLOGRAPHIC STUDIES

Template:ABSTRACT PUBMED 7929197

About this Structure

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

Reference

Fine tuning the specificity of the periplasmic phosphate transport receptor. Site-directed mutagenesis, ligand binding, and crystallographic studies., Wang Z, Choudhary A, Ledvina PS, Quiocho FA, J Biol Chem. 1994 Oct 7;269(40):25091-4. PMID:7929197

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