CropCircDB is a dedicated database and comprehensive system for crop circular RNAs. Currently, the database is developed to host 38,785 circular RNAs for maize and 63,048 circular RNAs for rice. The collected information can be used to help biologists to study this enigmatic molecule in crops.




The search option includes following information,

Column name Example Description
circName ath-circ59801-AT4G24020 A unique identifier describing the circular RNA. This is a novel naming design with hosting gene information
circID ath-circ59801-AT4G24020 A unique identifier used in the system that describing the circular RNA, including chromosome, start, end, and strand information
gene OS12T0123100 gene name hosting the circRNAs
isoform OS12T0123100-01 isoform name hosting the circRNAs




In the web page, the users can have the columns as follows,

Options Example Description
circName osa-circ43878-OS12T0123100 A unique identifier describing the circular RNA. This is a novel naming design with hosting gene information
circID 12:1096458-1096549_- A unique identifier used in the system that describing the circular RNA, including chromosome, start, end, and strand information
detection_score 0.33 a metric to measure the robustness of circRNAs in the sample. It is calculated by the number of samples containing this circRNAs / total number of samples. A rule of thumb is to use 1 as the cutoff value.
stress_detection_score 1.818 the environmental effect on the sample
stress cold a metric to measure the robustness of circRNAs in the stressed sample. It is calculated by the number of cold-stressed samples containing this circRNAs / total number of cold-stressed samples
genome_view link web link to JBrowser of the genome
circRNA_view link web link to circRNA structure
expression_view link web link to circRNA expression profile
gene OS12T0123100 the gene containing this circRNA
isoform OS12T0123100-01 the isoform containing this circRNA
tissue multipleTissue tissue information for this circRNA
chr 12 chromosome information for this circRNA
width 92 the length of this circRNA
start_anno exon,CDS the start position overlaps not only the boundary of exon, but also that of CDS
end_anno exon the end position overlaps the boundary of exon
antisense this circRNA are NOT antisense to existing gene
algorithm CIRCexplorer2 this circRNA are detected by CIRCexplorer2 software
splicedSeq GGGAGCCCTTCCGCCGCCGCCGCCGCCCCGATGTTGGGACACCTCCGGCGATCCTCCCAACGACTGCCCGTAGCCAACCTCGCCGTATACT the spliced sequence without intron sequence
predAA MLGHLRRSSQRLPVANLAVYWEPFRRRRRP the spliced sequence does NOT have stop-codon, and has potential to produce amino acid sequence
miRNA - there is NO miRNA candidate that interacts with the circular RNA (the results are predicted from psRNATarget)
superCircRNARegion 12:1094820-1096549_- super enriched region that hosts the circular RNA
crop rice crop species containing this circRNA
strand - strand information of this circRNA
start 1096458 start information of this circRNA
end 1096549 end information of this circRNA
seq GGGAGCCCTTCCGCCGCCGCCGCCGCCCCGATGTTGGGACACCTCCGGCGATCCTCCCAACGACTGCCCGTAGCCAACCTCGCCGTATACT full sequences of this circRNA from the start to the end position




Please feel free to send validated circular RNAs to johnsunx1@126.com or johnsunx1@yahoo.com. All new circular RNAs will be deposited into the database in 24 hours.


Any users can freely access and use CropCircDB for academic or industrial purpose without registrations and charge.


Please see "PUBLICATION" web page.