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Skin regional specification and higher-order HoxC regulation [ATAC-Seq]

ABSTRACT: Skin regional specification and higher-order HoxC regulation [ATAC-Seq]

PROVIDER: PRJNA1040307 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26830730_1.fastq.gz	Fastqsanger.gz
	SRR26830730_2.fastq.gz	Fastqsanger.gz
	SRR26830731_1.fastq.gz	Fastqsanger.gz
	SRR26830731_2.fastq.gz	Fastqsanger.gz
	SRR26830732_1.fastq.gz	Fastqsanger.gz

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Skin regional specification and higher-order HoxC regulation

Project description:Skin regional specification and higher-order HoxC regulation

| PRJNA1040303 | ENA

Skin regional specification and higher-order HoxC regulation [ATAC-Seq]

Project description:The integument plays a critical role in functional adaptation, with macro-regional specification forming structures like beaks, combs, feathers, and scales, while micro-regional specification modifies skin appendage shapes. However, the molecular mechanisms remain largely unknown. Craniofacial integument displays dramatic diversity, exemplified by the Polish chicken (PC) with a homeotic transformation of comb-to-crest feathers, caused by a 195–base pair (bp) duplication in HoxC10 intron. Micro-C analyses show that HoxC-containing topologically associating domain (TAD) is normally closed in the scalp but open in the dorsal and tail regions, allowing multiple long-distance contacts. In the PC scalp, the TAD is open, resulting in high HoxC expression. CRISPR-Cas9 deletion of the 195-bp duplication reduces crest feather formation, and HoxC misexpression alters feather shapes. The 195-bp sequence is found only in Archelosauria (crocodilians and birds) and not in mammals. These findings suggest that higher-order regulation of the HoxC cluster modulates gene expression, driving the evolution of adaptive integumentary appendages in birds.

2025-03-25 | GSE247779 | GEO