Objective:To identify and analyze the elongation factor Tu GTP-binding domain-containing 2(EFTUD2)promoter region for the further study of the gene in transcriptional control and expression. Methods:The EFTUD2 gene structure and potential promoter regions were analyzed by bioinformatics methods,and based on which four EFTUD2 promoter sequences were predicted. Whole-genome synthesis technology and high-fidelity PCR amplification were used to obtain the target promoter sequence. The target band was cloned into the dual luciferase reporter vector psiCHECK-2 by BglⅡ and NheⅠ double digestion,and four different EFTUD2 gene promoter luciferase reporter recombinants covering about 2 kb upstream of the EFTUD2 gene transcription initiation site were obtained. Luciferase assay was used to detect promoter activity. Results:Luciferase reporter assays demonstrated that,compared with the control group,the relative luciferase activity of the EFTUD2-0.5 recombinant increased(P < 0.05),suggesting that the EFTUD2 core promoter may be located in a region of 500 bp near the transcription initiation site. Conclusion:It was identified that the 500 bp upstream of the EFTUD2 gene transcription initiation site has promoter activity,and it is speculated that its core promoter is located in this region.