6hr1
Crystal structure of the YFPnano fusion proteinCrystal structure of the YFPnano fusion protein
Structural highlights
Function[MYLK2_RABIT] Implicated in the level of global muscle contraction and cardiac function (By similarity). Phosphorylates a specific serine in the N-terminus of a myosin light chain. Publication Abstract from PubMedChimeric fusion proteins are essential tools for protein nanotechnology. Non-optimized protein-protein connections are usually flexible and therefore unsuitable as structural building blocks. Here we show that the ER/K motif, a single alpha-helical domain (SAH), can be seamlessly fused to terminal helices of proteins, forming an extended, partially free-standing rigid helix. This enables the connection of two domains at a defined distance and orientation. We designed three constructs termed YFPnano, T4Lnano, and MoStoNano. Analysis of experimentally determined structures and molecular dynamics simulations reveals a certain degree of plasticity in the connections that allows the adaptation to crystal contact opportunities. Our data show that SAHs can be stably integrated into designed structural elements, enabling new possibilities for protein nanotechnology, for example, to improve the exposure of epitopes on nanoparticles (structural vaccinology), to engineer crystal contacts with minimal impact on construct flexibility (for the study of protein dynamics), and to design novel biomaterials. Chimeric single alpha-helical domains as rigid fusion protein connections for protein nanotechnology and structural biology.,Collu G, Bierig T, Krebs AS, Engilberge S, Varma N, Guixa-Gonzalez R, Sharpe T, Deupi X, Olieric V, Poghosyan E, Benoit RM Structure. 2021 Sep 24. pii: S0969-2126(21)00330-0. doi:, 10.1016/j.str.2021.09.002. PMID:34587504[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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