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Hypoxia-inducible factors (HIFs) are heterodimeric transcription factors central to hypoxia response and cancer development. Within the HIF-2 complex, one domain (HIF-2α PAS-B) contains a large (290 Å3) buried cavity filled with water molecules within its hydrophobic core. Such cavities are uncommon except in the case of ligand-binding proteins, leading to the hypothesis that HIF-2α can be regulated...
Putative light-sensing proteins are ubiquitously encoded in the genomes of chemotrophic, non-photosynthetic bacteria. Surprisingly, these are not limited to UV-receptors: the metagenome of the chemotrophic prokaryotes encodes representatives of all known major families of photoreceptors. Insight into the mechanism of light-mediated signaling is relatively advanced, but most light-induced physiological...
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