[Objective] The ras promoters were cloned from genomic DNA of Auricuralia auricular so as to provide promoters for breeding better species by genetic technology. [Method] PCR was used to clone promoters with the genomic DNA of A. auricular strain YBS-3 as template,and then the sequences of four ras promoters were obtained. The analysis of promoter sequences was made by three promoter analysis software：Promoter prediction,Place and TFSEARCH ver.1.3. [Result] Four fragments contained core elements of promoter including TATA-box and CAAT-box,and many other important cis-elements such as GATA BOX,GCGC BOX,CCAAT BOX1,etc. At the same time,there was at least one transcriptional start site in these sequences. And several transcription factor binding sites were detected in these sequences. [Conclusion] Four promoter fragments all had promoter function theoretically.
