6F0T

Crystal structure of Pizza6-SFW

Summary for 6F0T

• Entry DOI: 10.2210/pdb6f0t/pdb
• Descriptor: Pizza6-SFW, GLYCEROL (3 entities in total)
• Functional Keywords: artificial protein, beta propeller, de novo protein
• Biological source: synthetic construct
• Total number of polymer chains: 3
• Total formula weight: 77693.39

Authors

Noguchi, H.,De Zitter, E.,Van Meervelt, L.,Voet, A.R.D. (deposition date: 2017-11-20, release date: 2018-03-21, Last modification date: 2024-05-08)

Primary citation

Noguchi, H.,Mylemans, B.,De Zitter, E.,Van Meervelt, L.,Tame, J.R.H.,Voet, A.
Design of tryptophan-containing mutants of the symmetrical Pizza protein for biophysical studies.
Biochem. Biophys. Res. Commun., 497:1038-1042, 2018

PubMed Abstract: β-propeller proteins are highly symmetrical, being composed of a repeated motif with four anti-parallel β-sheets arranged around a central axis. Recently we designed the first completely symmetrical β-propeller protein, Pizza6, consisting of six identical tandem repeats. Pizza6 is expected to prove a useful building block for bionanotechnology, and also a tool to investigate the folding and evolution of β-propeller proteins. Folding studies are made difficult by the high stability and the lack of buried Trp residues to act as monitor fluorophores, so we have designed and characterized several Trp-containing Pizza6 derivatives. In total four proteins were designed, of which three could be purified and characterized. Crystal structures confirm these mutant proteins maintain the expected structure, and a clear redshift of Trp fluorescence emission could be observed upon denaturation. Among the derivative proteins, Pizza6-AYW appears to be the most suitable model protein for future folding/unfolding kinetics studies as it has a comparable stability as natural β-propeller proteins.

PubMed: 29481797
DOI: 10.1016/j.bbrc.2018.02.168

Experimental method

X-RAY DIFFRACTION (1.74 Å)