Genome-wide identification and expression analysis of the PTP family in Chinese cabbage (Brassica rapa subsp. pekinensis)

Protein tyrosine phosphatases (PTPs) are signaling enzymes that plays an important role in plant growth and development. Bioinformatics was used to analyze the PTP gene family of Brassica rapa ssp. pekinensis. Forty-six BrPTP family members were identified. These families were divided into eight subfamilies according to the protein domain. The relationship between gene structure and evolution was determined by comparing gene structure with the evolutionary tree. The 46 BrPTP genes were unevenly distributed across the chromosomes and two pairs were identified to be tandem repeats. The BrPTP domain contained eight important motifs. Motifs of the same subfamily were basically identical, while that of each subfamily differed. These common motifs in these subfamilies are essential for PTP protein function. Analysis of BrPTP by qRT-PCR revealed tissue-specific differences in expression. Most BrPTP genes were expressed in the five tissues examined, but not all. Expression patterns under stress showed that most genes were involved in the stress response. Further study of the PTP gene family may reveal more of its functions in Chinese cabbage.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author