China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (6): 2482-2493.doi: 10.16431/j.cnki.1671-7236.2025.06.003

• Biotechnology • Previous Articles    

Cloning,Bioinformatics Analysis and Tissue Expression of CXCL12 Gene in Hezuo Pigs

YANG Quan1,3, LI Xiao1,3, YAN Zunqiang1,3, WANG Pengfei1,3, HUANG Xiaoyu1,3, GAO Xiaoli1,3, YANG Qiaoli1,3, GUN Shuangbao1,2,3, YANG Jiaojiao1,2,3   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. Gansu Province Modern Pig Engineering Technology Innovate Center, Lanzhou 730070, China;
    3. Gansu Diebu Juema Pig Science and Technology Backyard, Lanzhou 730070, China
  • Received:2024-11-19 Published:2025-05-27

Abstract: 【Objective】 This study was aimed to clone and perform bioinformatics analysis on the stromal cell-derived factor-1 (SDF-1/CXCL12) gene in Hezuo pigs,and detect the expression of CXCL12 gene in different tissues,establishing a foundation for further functional investigation of CXCL12 gene.【Method】 Using cDNA from the heart of Hezuo pigs as a template,the CXCL12 gene CDS sequence was amplified via PCR,cloned and sequenced,the similarity alignment and phylogenetic tree construction for the obtained sequence were performed.Bioinformatics software was used to analyze the physicochemical property and structural function of CXCL12 protein.The expression of CXCL12 gene in different tissues of Hezuo pigs was detected by Real-time quantitative PCR.【Result】 The full-length CDS sequence of CXCL12 gene in Hezuo pigs was 351 bp,encoding 116 amino acids.CXCL12 gene in Hezuo pigs was most closely related to Equus cabllus,and was distantly related to Oryx dammah.CXCL12 protein lacked transmembrane regions and signal peptide,included a low complexity region SCY,with a hydrophilicity index of ―0.347,it belonged to hydrophilic proteins.CXCL12 protein contained 12 phosphorylation sites.The secondary structure was predominantly compose of random coil (54.31%) and alpha helix (32.76%),which was consistent with the tertiary structure.The protein was primarily located in nucleus and mitochondria,and interacted with proteins such as CCL21 and CXCL9.Real-time quantitative PCR results showed that the expression of CXCL12 gene in liver of Hezuo pigs was extremely significantly higher than that in other tissues (P<0.01),and the expression in kidney and heart was extremely significantly lower than that in other tissues (P<0.01).【Conclusion】 This study successfully cloned the CDS sequence of CXCL12 gene in Hezuo pigs,encoding 116 amino acids,mainly distributed in nucleus and mitochondria.It was a stable,hydrophilic and secretory protein without transmembrane structures.The highest expression of CXCL12 gene was observed in liver of Hezuo pigs.The results provided a reference for further exploring the regulatory roles of CXCL12 gene in immune mechanisms of Hezuo pigs.

Key words: Hezuo pigs; CXCL12 gene; cloning; bioinformatics; expression

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