| Autor: |
Chen S; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China., Jiang J; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China., Liang W; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China., Tang Y; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China., Lyu R; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China., Hu Y; College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China., Cai D; College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China., Luo X; College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China., Sun M; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China.; Joint International Research Laboratory of Important Animal Infectious Diseases and Zoonoses of Jiangsu Higher Education Institutions, Yangzhou University, Yangzhou 225009, China.; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou University, Yangzhou 225009, China.; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou 225009, China. |
| Abstrakt: |
As the most abundant class of transcription factors in eukaryotes, C2H2-type zinc finger proteins (C2H2-ZFPs) play critical roles in various biological processes. Despite being extensively studied in mammals, C2H2-ZFPs remain poorly characterized in birds. Recent accumulation of multi-omics data for chicken enables the genome-wide investigation of C2H2-ZFPs in birds. The purpose of this study is to reveal the genomic occurrence and evolutionary signature of chicken C2H2-ZFPs, and further depict their expression profiles across diverse chicken tissues. Here, we annotated 301 C2H2-ZFPs in chicken genome, which are associated with different effector domains, including KRAB, BTB, HOMEO, PHD, SCAN, and SET. Among them, most KRAB-ZFPs lack orthologues in mammals and tend to form clusters by duplication, supporting their fast evolution in chicken. We also annotated a unique and previously unidentified SCAN-ZFP, which is lineage-specific and highly expressed in ovary and testis. By integrating 101 RNA-seq datasets for 32 tissues, we found that most C2H2-ZFPs have tissue-specific expression. Particularly, 74 C2H2-ZFPs-including 27 KRAB-ZFPs-show blastoderm-enriched expression, indicating their association with early embryo development. Overall, this study performs comprehensive annotation and expression profiling of C2H2 ZFPs in diverse chicken tissues, which gives new insights into the evolution and potential function of C2H2-ZFPs in avian species. |
