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A Preliminary X-Ray Study of a Refolded PTS EIIBfruc Protein from Escherichia coli

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Abstract:

The phosphoenolpyruvate-carbohydrate phosphotransferase system (PTS) catalyzes the phosphorylation and transportation of its sugar substrates. A sugar-specific enzyme II complex involved in the PTS finally functions to translocate substrates across the membrane. A PTS EIIBfruc protein, a fructose specific EIIB subunit, from Escherichia coli has been cloned, expressed, refolded, purified, and crystallized. The synchrotron data were collected to 2.6 Å from the crystal of a selenomethionine substitute PTS EIIBfruc protein. The crystal belongs to the primitive trigonal space group P3121, with unit-cell parameters of a = 33.4 Å, b = 33.4 Å, c = 154.0 Å, and β = 120.0°. A full structure determination is under way to provide insights into the structure-function relationships of this protein.





Keywords: Phosphoenolpyruvate-carbohydrate phosphotransferase system; X-ray; a fructose specific EIIB subunit; crystal; refolding

Document Type: Research Article

DOI: https://doi.org/10.2174/092986608784967001

Publication date: 2008-07-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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