Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2

Telomeres, the ends of the chromosomes, have always been an interesting area of structural genomic research as they are known to play crucial roles in ageing and cancer. The organization of human telomeric chromatin has been implicated in its functional roles as telomeres are the protectors of the e...

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Main Author: Neo, Qi Ying
Other Authors: Lars Nordenskiöld
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
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Online Access:https://hdl.handle.net/10356/163839
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spelling sg-ntu-dr.10356-1638392023-02-28T18:09:43Z Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2 Neo, Qi Ying Lars Nordenskiöld School of Biological Sciences LarsNor@ntu.edu.sg Science::Biological sciences Telomeres, the ends of the chromosomes, have always been an interesting area of structural genomic research as they are known to play crucial roles in ageing and cancer. The organization of human telomeric chromatin has been implicated in its functional roles as telomeres are the protectors of the ends of chromosome. Shelterin, a six-protein complex, is found to be associated with telomeres. The complex comprises of TRF1, TRF2, TIN2, RAP1, TPP1 and POT1. In this paper, the effect of TRF2 on human telomeric chromatin was studied. To achieve this, full-length TRF2 and telomeric DNA templates comprising 10x157bp telomeric repeats (T10) has been expressed in E. coli and purified in large-scale. T10 nucleosome array was reconstituted with histone octamers tagged with different fluorescent tags, such that liquid-liquid phase separation (LLPS) of telomeric chromatin and its interaction with TRF2 can be studied. LLPS was conducted using confocal microscopy using different TRF2 to T10 nucleosome arrays ratios to understand its effect on telomeric chromatin behavior – if droplets were formed. Results suggests that TRF2 mediates inter- array interaction of the human telomeric chromatin to form droplets. This finding will pave way to understand the role TRF2 on telomeric chromatin in ageing and cancer. Bachelor of Science in Biological Sciences 2022-12-20T04:08:26Z 2022-12-20T04:08:26Z 2022 Final Year Project (FYP) Neo, Q. Y. (2022). Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/163839 https://hdl.handle.net/10356/163839 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Biological sciences
spellingShingle Science::Biological sciences
Neo, Qi Ying
Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
description Telomeres, the ends of the chromosomes, have always been an interesting area of structural genomic research as they are known to play crucial roles in ageing and cancer. The organization of human telomeric chromatin has been implicated in its functional roles as telomeres are the protectors of the ends of chromosome. Shelterin, a six-protein complex, is found to be associated with telomeres. The complex comprises of TRF1, TRF2, TIN2, RAP1, TPP1 and POT1. In this paper, the effect of TRF2 on human telomeric chromatin was studied. To achieve this, full-length TRF2 and telomeric DNA templates comprising 10x157bp telomeric repeats (T10) has been expressed in E. coli and purified in large-scale. T10 nucleosome array was reconstituted with histone octamers tagged with different fluorescent tags, such that liquid-liquid phase separation (LLPS) of telomeric chromatin and its interaction with TRF2 can be studied. LLPS was conducted using confocal microscopy using different TRF2 to T10 nucleosome arrays ratios to understand its effect on telomeric chromatin behavior – if droplets were formed. Results suggests that TRF2 mediates inter- array interaction of the human telomeric chromatin to form droplets. This finding will pave way to understand the role TRF2 on telomeric chromatin in ageing and cancer.
author2 Lars Nordenskiöld
author_facet Lars Nordenskiöld
Neo, Qi Ying
format Final Year Project
author Neo, Qi Ying
author_sort Neo, Qi Ying
title Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
title_short Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
title_full Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
title_fullStr Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
title_full_unstemmed Liquid-liquid phase separation of telomeric nucleosome array is mediated by TRF2
title_sort liquid-liquid phase separation of telomeric nucleosome array is mediated by trf2
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/163839
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