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NPAS1-ARNT and NPAS3-ARNT crystal structures implicate the bHLH-PAS family as multi-ligand binding transcription factors

Journal Article · · eLife
DOI:https://doi.org/10.7554/eLife.18790· OSTI ID:1347613
 [1];  [2];  [2];  [3];  [2]
  1. Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (United States); Shandong Univ., Qingdao (China)
  2. Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)

Here, the neuronal PAS domain proteins NPAS1 and NPAS3 are members of the basic helix-loop-helix-PER-ARNT-SIM (bHLH-PAS) family, and their genetic deficiencies are linked to a variety of human psychiatric disorders including schizophrenia, autism spectrum disorders and bipolar disease. NPAS1 and NPAS3 must each heterodimerize with the aryl hydrocarbon receptor nuclear translocator (ARNT), to form functional transcription complexes capable of DNA binding and gene regulation. Here we examined the crystal structures of multi-domain NPAS1-ARNT and NPAS3-ARNT-DNA complexes, discovering each to contain four putative ligand-binding pockets. Through expanded architectural comparisons between these complexes and HIF-1α-ARNT, HIF-2α-ARNT and CLOCK-BMAL1, we show the wider mammalian bHLH-PAS family is capable of multi-ligand-binding and presents as an ideal class of transcription factors for direct targeting by small-molecule drugs.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); Army Research Office; USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1347613
Journal Information:
eLife, Journal Name: eLife Vol. 5; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Bidirectional modulation of HIF-2 activity through chemical ligands journal February 2019
Druggability assessment of mammalian Per–Arnt–Sim [PAS] domains using computational approaches journal January 2019
Bidirectional Modulation of HIF‐2 Activity through Chemical Ligands journal April 2019
Molecular analysis of NPAS3 functional domains and variants journal December 2018
The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments journal February 2018

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