Related Experiment Video
Updated: Jul 20, 2025
09:32
Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
Published on: October 14, 2022
3.5K
Leveraging polymer modeling to reconstruct chromatin connectivity from live images
Sayantan Dutta1, Ashesh Ghosh1, Alistair N Boettiger2
1Department of Chemical Engineering, Stanford University, Stanford, California.
Biophysical Journal
|August 5, 2023
Summary
This study presents a polymer physics model and algorithm to map chromosomal structure from live cell imaging. It improves interpretation of in vivo biopolymer dynamics and guides experimental design for accurate chromatin tracking.
Area of Science:
- Molecular Biology
- Biophysics
- Genomics
Background:
- Chromosomal dynamics are crucial for gene regulation, recombination, and replication.
- Current chromatin visualization methods are limited in scope and resolution.
- Mapping chromosomal structure from experimental data is challenging.
Purpose of the Study:
- To develop a computational approach for mapping chromosomal structure using polymer physics.
- To create an algorithm for tracking polymer configuration from live fluorescent microscopy images.
- To establish a theoretical framework for interpreting in vivo biopolymer dynamics.
Main Methods:
- Developed an exact analytical expression for polymer configuration evolution using a flexible-polymer model.
- Proposed an algorithm to track polymer configuration from live chromatin imaging with fluorescent markers.
- Utilized experimental locus-tracking data to validate the modeling approach.
Main Results:
- The model provides an exact analytical expression for polymer configuration evolution.
- The algorithm accurately tracks polymer configuration from live imaging data.
- The study identifies microscopy resolution requirements for high-accuracy marker tracking.
- Statistical confidence in assigning genome identity to visualized marks is established.
Conclusions:
- The computational approach significantly enhances the interpretation of in vivo biopolymer dynamics.
- The findings provide a basis for designing experiments with desired resolution for chromatin studies.
- This work bridges polymer physics with experimental measurements for a deeper understanding of chromosomal organization.
Related Concept Videos
02:36Chromatin Immunoprecipitation- ChIP
11.2K
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
11.2K
01:32Chromatin Modification in iPS Cells
1.7K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
1.7K