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Title: Structure-based discovery of NANOG variant with enhanced properties to promote self-renewal and reprogramming of pluripotent stem cells

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [3];  [4];  [5];  [5];  [2];  [5];  [6];  [6];  [5];  [6];  [7];  [8];  [1];  [9];  [5];  [10];  [2]
  1. Gladstone Institutes of Cardiovascular Disease, San Francisco, CA (United States)
  2. Univ. of California, San Francisco, CA (United States)
  3. The Scripps Research Institute, La Jolla, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Univ. of California, San Francisco, CA (United States); Structural Biology Research Center, Tsukuba, Ibaraki (Japan)
  5. The Scripps Research Institute, La Jolla, CA (United States)
  6. The Scripps Research Institute, La Jolla, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. The Scripps Research Institute, La Jolla, CA (United States); Univ. of California, San Diego, CA (United States); Sanford-Burnham Medical Research Institute, La Jolla, CA (United States)
  8. The Scripps Research Institute, La Jolla, CA (United States); Genomics Institute of the Novartis Research Foundation, San Diego, CA (United States)
  9. Gladstone Institutes of Cardiovascular Disease, San Francisco, CA (United States);
  10. Gladstone Institutes of Cardiovascular Disease, San Francisco, CA (United States); Kyoto Univ., Kyoto (Japan)

NANOG (from Irish mythology Tír na nÓg) transcription factor plays a central role in maintaining pluripotency, cooperating with OCT4 (also known as POU5F1 or OCT3/4), SOX2, and other pluripotency factors. Although the physiological roles of the NANOG protein have been extensively explored, biochemical and biophysical properties in relation to its structural analysis are poorly understood. Here we determined the crystal structure of the human NANOG homeodomain (hNANOG HD) bound to an OCT4 promoter DNA, which revealed amino acid residues involved in DNA recognition that are likely to be functionally important. We generated a series of hNANOG HD alanine substitution mutants based on the protein–DNA interaction and evolutionary conservation and determined their biological activities. Some mutant proteins were less stable, resulting in loss or decreased affinity for DNA binding. Overexpression of the orthologous mouse NANOG (mNANOG) mutants failed to maintain self-renewal of mouse embryonic stem cells without leukemia inhibitory factor. These results suggest that these residues are critical for NANOG transcriptional activity. Interestingly, one mutant, hNANOG L122A, conversely enhanced protein stability and DNA-binding affinity. The mNANOG L122A, when overexpressed in mouse embryonic stem cells, maintained their expression of self-renewal markers even when retinoic acid was added to forcibly drive differentiation. When overexpressed in epiblast stem cells or human induced pluripotent stem cells, the L122A mutants enhanced reprogramming into ground-state pluripotency. These findings indicate that structural and biophysical information on key transcriptional factors provides insights into the manipulation of stem cell behaviors and a framework for rational protein engineering.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
GM094614; GM094586; AC03-76SF00515
OSTI ID:
1224059
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 112, Issue 15; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

References (41)

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Cited By (11)

Deep learning at base-resolution reveals motif syntax of the cis-regulatory code journal July 2020
Epigenetic Contribution of High-Mobility Group A Proteins to Stem Cell Properties journal January 2018
Automated Adherent Cell Elimination by a High-Speed Laser Mediated by a Light-Responsive Polymer journal March 2018
Autotaxin-mediated lipid signaling intersects with LIF and BMP signaling to promote the naive pluripotency transcription factor program journal October 2016
Structural mechanism of DNA-mediated Nanog–Sox2 cooperative interaction journal January 2019
Chimeric NANOG repressors inhibit glioblastoma growth in vivo in a context-dependent manner journal March 2019
Automated adherent cell elimination by a high-speed laser mediated by a light-responsive polymer journal December 2018
Context-Dependent Functions of NANOG Phosphorylation in Pluripotency and Reprogramming journal May 2017
Naive-like ESRRB+ iPSCs with the Capacity for Rapid Neural Differentiation journal December 2017
Plumbagin suppresses epithelial to mesenchymal transition and stemness via inhibiting Nrf2-mediated signaling pathway in human tongue squamous cell carcinoma cells journal October 2015
Induced pluripotent stem cells throughout the animal kingdom: Availability and applications journal August 2019

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