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Altered chromatin topologies caused by balanced chromosomal translocation lead to central iris hypoplasia [Cut & Tag]

ABSTRACT: Altered chromatin topologies caused by balanced chromosomal translocation lead to central iris hypoplasia [Cut & Tag]

PROVIDER: PRJNA1107487 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28893570_1.fastq.gz	Fastqsanger.gz
	SRR28893570_2.fastq.gz	Fastqsanger.gz
	SRR28893571_1.fastq.gz	Fastqsanger.gz
	SRR28893571_2.fastq.gz	Fastqsanger.gz
	SRR28893572_1.fastq.gz	Fastqsanger.gz

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Altered chromatin topologies caused by balanced chromosomal translocation lead to central iris hypoplasia [RNA-Seq]

Project description:Despite the advent of genomic sequencing, molecular diagnosis remains unsolved in approximately half of patients with Mendelian disorders, largely due to unclarified functions of noncoding regions and the difficulty in identifying complex structural variations. In this study, we map a unique form of central iris hypoplasia in a large family to 6q15-q23.3 and 18p11.31-q12.1 using a genome-wide linkage scan. Long-read sequencing reveals a balanced translocation t(6;18)(q22.31;p11.22) with intergenic breakpoints. By performing Hi-C on induced pluripotent stem cells from a patient, we identify two chromatin topologically associating domains spanning across the breakpoints. These alterations lead the ectopic chromatin interactions between APCDD1 on chromosome 18 and enhancers on chromosome 6, resulting in upregulation of APCDD1. Notably, APCDD1 is specifically localized in the iris of human eyes. Our findings demonstrate that noncoding structural variations can lead to Mendelian diseases by disrupting the 3D genome structure and resulting in altered gene expression.

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Altered chromatin topologies caused by balanced chromosomal translocation lead to central iris hypoplasia [Hi-C]

Project description:Altered chromatin topologies caused by balanced chromosomal translocation lead to central iris hypoplasia [Hi-C]

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