Abstract
As a plant-specific transcription factor, the NAC (NAM, ATAF1/2 and CUC2) domain protein plays an important role in plant growth and development, as well as stress resistance. Based on the genomic data of the cacao tree, this study identified 102 cacao NAC genes and named them according to their location within the genome. The phylogeny of the protein sequence of the cacao tree NAC family was analyzed using various bioinformatic methods, and then divided into 12 subfamilies. Then, the amino-acid composition, physicochemical properties, genomic location, gene structure, conserved domains, and promoter cis-acting elements were analyzed. This study provides information on the evolution of the TcNAC gene and its possible functions, laying the foundation for further research on the NAC family.
Highlights
Transcription factors are proteins that control the rate of transcription of genetic information fromDNA to messenger RNA, by binding to cis-acting promoter elements [1]
NAC transcription factor sequences in Theobroma cacao were retrieved from the Theobroma cacao genome according to the HMM
Detailed information on the NAC family genes in the cacao tree, including name and identifier (ID), number of aa, pIs, molecular weight (MW), open reading frame (ORF), and subcellular localization is provided in Supplementary File 2
Summary
Transcription factors are proteins that control the rate of transcription of genetic information fromDNA to messenger RNA, by binding to cis-acting promoter elements [1]. Each transcription factor contains at least one DNA-binding domain, which determines its main function in the gene expression regulatory network. According to their DNA binding domain, transcription factors in plants are divided into several families, such as WKRY, bZIP, MYB, DREB, AP2/EREBP, C2H2, NAC, etc. The N-terminal region is a conserved DNA domain, which comprises nearly 160 amino acids (aa) and can be further divided into five subdomains (A–E) The conservation of these five subdomains is in the order A > C > D > B > E, and subdomains A and C play a role in stabilization of the protein. The C-terminal region is a highly variable transcriptional regulatory region that interacts with DNA or other transcription factors [6,7]
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