Carolina Rios-Martinez
Ph.D. Student in Bioengineering, admitted Autumn 2022
Education & Certifications
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Master of Science, Stanford University, BIOE-MS (2024)
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BS, University of California, Berkeley, Bioengineering (2022)
All Publications
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mu DamID: A Microfluidic Approach for Joint Imaging and Sequencing of Protein-DNA Interactions in Single Cells
CELL SYSTEMS
2020; 11 (4): 354-+
Abstract
DNA adenine methyltransferase identification (DamID) measures a protein's DNA-binding history by methylating adenine bases near each protein-DNA interaction site and then selectively amplifying and sequencing these methylated regions. Additionally, these interactions can be visualized using m6A-Tracer, a fluorescent protein that binds to methyladenines. Here, we combine these imaging and sequencing technologies in an integrated microfluidic platform (μDamID) that enables single-cell isolation, imaging, and sorting, followed by DamID. We use μDamID and an improved m6A-Tracer protein to generate paired imaging and sequencing data from individual human cells. We validate interactions between Lamin-B1 protein and lamina-associated domains (LADs), observe variable 3D chromatin organization and broad gene regulation patterns, and jointly measure single-cell heterogeneity in Dam expression and background methylation. μDamID provides the unique ability to compare paired imaging and sequencing data for each cell and between cells, enabling the joint analysis of the nuclear localization, sequence identity, and variability of protein-DNA interactions. A record of this paper's transparent peer review process is included in the Supplemental Information.
View details for DOI 10.1016/j.cels.2020.08.015
View details for Web of Science ID 000582118000004
View details for PubMedID 33099405
View details for PubMedCentralID PMC7588622