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Species: Brown rat
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circRNA ID Gene Gene Type Strand (circRNA/Gene)
circRNA Type i

The back-fusion junctions (BFJs) of circRNAs from genic regions may have three possible positions relative to the nearest exon-intron boundaries of their cognate linear transcripts, giving rise to three circRNA subtypes:

(1) canonical (or completely boundary) circRNAs with both BFJs aligning to exon-intron boundaries;

(2) half interior (or half boundary) circRNAs with one, but not both, of the BFJs aligning to exon-intron boundaries;

(3) complete interior (or non-boundary) circRNAs with both junctions appearing inside of exons or introns.

Lariats are byproducts of splicing and can be regarded as variants of canonical circRNAs; for clarity, we list lariats separately here.

Intergenic circRNAs, derived from intergenic regions that often encode poorly annotated noncoding transcripts, can be considered a new distinct subtype of their own.

We collectively refer to complete interior, half interior, and intergenic circRNAs as noncanonical circRNAs (nc-circRNAs) to distinguish them from canonical circRNAs (c-circRNAs).

CircRNA Types Diagram
Position Length Species
Ttc3/11:47174609-47174610-47173096-47173097-+/+ Ttc3 protein_coding +/+ canonical (exon-exon) 11:47174609-47173096 1513.0 Brown rat
intergenic/11:272555-272556-273312-273313--/. intergenic Na -/. intergenic 11:272555-273312 757.0 Brown rat
intergenic/20:3441463-3441469-3483701-3483707--/. intergenic Na -/. intergenic 20:3441469-3483707 42238.0 Brown rat
Hsdl2/5:79264122-79264129-79264038-79264045-+/+ Hsdl2 protein_coding +/+ interior 5:79264129-79264045 84.0 Brown rat
RNase_MRP/5:62544817-62544818-62545006-62545007--/- RNase_MRP ribozyme -/- interior 5:62544818-62545007 189.0 Brown rat
Lrp6/4:169104707-169104708-169105101-169105102--/- Lrp6 protein_coding -/- canonical (exon-exon) 4:169104708-169105102 394.0 Brown rat
Rn28s/11:484767-484768-485542-485543--/- Rn28s rRNA -/- interior 11:484768-485543 775.0 Brown rat
intergenic/1:212512588-212512589-212512669-212512670--/. intergenic Na -/. intergenic 1:212512589-212512670 81.0 Brown rat
intergenic/1:207337348-207337355-207356650-207356657--/. intergenic Na -/. intergenic 1:207337348-207356650 19302.0 Brown rat
intergenic/1:212517258-212517266-212517336-212517344--/. intergenic Na -/. intergenic 1:212517266-212517344 78.0 Brown rat