Examples
The influenza virus protein viral neuraminidase is a six-bladed beta-propeller protein whose active form is a tetramer. It is one of two proteins present in the viral envelope and catalyzes the cleavage of sialic acid moieties from cell-membrane proteins to aid in the targeting of newly produced virions to previously uninfected cells.
The plant UV-B sensing protein UVR8 is a seven-bladed propeller which is dimeric until absorption of UV-B light, which causes dissociation.
WD40 repeats, also known as beta-transducin repeats, are short fragments found primarily in eukaryotes. They are often assembled in 4 to 16 repeated units to form a structural domain critical for protein-protein interactions.
Read more about this topic: Beta-propeller
Famous quotes containing the word examples:
“There are many examples of women that have excelled in learning, and even in war, but this is no reason we should bring ‘em all up to Latin and Greek or else military discipline, instead of needle-work and housewifry.”
—Bernard Mandeville (1670–1733)
“Histories are more full of examples of the fidelity of dogs than of friends.”
—Alexander Pope (1688–1744)
“It is hardly to be believed how spiritual reflections when mixed with a little physics can hold people’s attention and give them a livelier idea of God than do the often ill-applied examples of his wrath.”
—G.C. (Georg Christoph)