Effects of Increased Loop Flexibility on the Structure and Stability of a De Novo Designed Helical Protein.

Authors: Simons B.; Scholl D.; Cyr T.; Hefford M.Alice

Source: Protein and Peptide Letters, Volume 8, Number 2, April 2001 , pp. 89-96(8)

Publisher: Bentham Science Publishers

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Abstract:

MB-1 is a de novo protein designed to incorporate amino acids required for dairy cow nutrition while folding into a four-helix-bundle. Analysis shows that, as per design, MB-1 is a largely helical protein but appears to be dimeric and shows less stability than expected. Recent evidence indicates that the loop regions in MB-1 may have been under-designed. The variant, MB-16, described here attempts to correct potentially detrimental effects on turn formation by introducing a flexible, five-glycine residues sequence as the second loop.

Keywords: de novo protein; mb-1; mb-16

Language: English

Document Type: Review article

DOI: http://dx.doi.org/10.2174/0929866013409580

Publication date: 2001-04-01

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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.