IFITM 3 requires an amphipathic helix for antiviral activity

The antiviral protein, viperin, localizes to lipid droplets via its N-terminal amphipathic alpha-helix.

Lipid droplets are intracellular lipid-storage organelles that are thought to be derived from the endoplasmic reticulum (ER). Several pathogens, notably hepatitis C virus, use lipid droplets for replication. Numerous questions remain about how lipid droplets are generated and used by viruses. Here we show that the IFN-induced antiviral protein viperin, which localizes to the cytosolic face of t...

IFITM-2 and IFITM-3 but not IFITM-1 restrict Rift Valley fever virus.

We show that interferon-induced transmembrane protein 1 (IFITM-1), IFITM-2, and IFITM-3 exhibit a broad spectrum of antiviral activity against several members of the Bunyaviridae family, including Rift Valley fever virus (RVFV), La Crosse virus, Andes virus, and Hantaan virus, all of which can cause severe disease in humans and animals. We found that RVFV was restricted by IFITM-2 and -3 but no...

Aerobic sn-glycerol-3-phosphate dehydrogenase from Escherichia coli binds to the cytoplasmic membrane through an amphipathic alpha-helix.

sn-Glycerol-3-phosphate dehydrogenase (GlpD) from Escherichia coli is a peripheral membrane enzyme involved in respiratory electron transfer. For it to display its enzymic activity, binding to the inner membrane is required. The way the enzyme interacts with the membrane and how this controls activity has not been elucidated. In the present study we provide evidence for direct protein-lipid int...

Amphipathic α-Helix Mediates the Heterodimerization of Soluble Guanylyl Cyclase

Talin contains three similar vinculin-binding sites predicted to form an amphipathic helix.

Using recombinant talin polypeptides and an SDS/PAGE-blot overlay assay, we have previously identified three regions of talin that are involved in binding to vinculin [Gilmore, Wood, Ohanian, Jackson, Patel, Rees, Hynes and Critchley (1993) J. Cell Biol. 122, 337-347]. We have confirmed these observations by using a yeast two-hybrid assay and shown that talin residues 498-656, 852-950 and 1929-...