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HIF-2?-pVHL complex reveals broad genotype-phenotype correlations in HIF-2?-driven disease.


ABSTRACT: It is definitively established that mutations in transcription factor HIF-2? are causative of both neuroendocrine tumors (class 1 disease) and polycythemia (class 2 disease). However, the molecular mechanism that underlies this emergent genotype-phenotype relationship has remained unclear. Here, we report the structure of HIF-2? peptide bound to pVHL-elongin B-elongin C (VBC) heterotrimeric complex, which shows topographical demarcation of class 1 and 2 mutations affecting residues predicted, and demonstrated via biophysical analyses, to differentially impact HIF-2?-pVHL interaction interface stability. Concordantly, biochemical experiments showed that class 1 mutations disrupt pVHL affinity to HIF-2? more adversely than class 2 mutations directly or indirectly via impeding PHD2-mediated hydroxylation. These findings suggest that neuroendocrine tumor pathogenesis requires a higher HIF-2? dose than polycythemia, which requires only a mild increase in HIF-2? activity. These biophysical data reveal a structural basis that underlies, and can be used to predict de novo, broad genotype-phenotype correlations in HIF-2?-driven disease.

SUBMITTER: Tarade D 

PROVIDER: S-EPMC6105673 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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HIF-2α-pVHL complex reveals broad genotype-phenotype correlations in HIF-2α-driven disease.

Tarade Daniel D   Robinson Claire M CM   Lee Jeffrey E JE   Ohh Michael M  

Nature communications 20180822 1


It is definitively established that mutations in transcription factor HIF-2α are causative of both neuroendocrine tumors (class 1 disease) and polycythemia (class 2 disease). However, the molecular mechanism that underlies this emergent genotype-phenotype relationship has remained unclear. Here, we report the structure of HIF-2α peptide bound to pVHL-elongin B-elongin C (VBC) heterotrimeric complex, which shows topographical demarcation of class 1 and 2 mutations affecting residues predicted, an  ...[more]

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