we can search circBase ID on the circBase website and get information about the circular RNA including DNA position and length of splice. However, it doesn't provide the circular RNAs sequence. My question is how to get a circular RNA sequence from its circBase ID?
You won't find them on circBase.
circAtlas has the mature spliced sequence available. You can search for circRNAs and find the sequence. Alternatively, download all circRNA sequences in a FASTA file here.
The catch is that the circRNA IDs are in 'circAtlas format', not circBase. You can download the circRNA BED file provided by circBase and circAtlas and match the coordinates to generate circBase-circAtlas mapping keys for extracting the sequence from the FASTA file.
Thank you for your reply, Barry. Upon further searching, I discovered that circular RNA sequences can be downloaded from the downloads section of circBase (http://circbase.org/cgi-bin/downloads.cgi) in FASTA format. However, I found out that all sequences must be downloaded in one file and cannot be downloaded one by one.
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No I did not. I know this is a cultural mannerism but it's antiquated. Please abandon this phrase, it can come across as condescending.
I didn't know