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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
intergenic/1:207336809-207336825-207344506-207344522--/. intergenic Na -/. intergenic 1:207336825-207344522 7697.0 Brown rat
Hnrnph2/10:35201130-35201131-35201070-35201071-+/+ Hnrnph2 protein_coding +/+ canonical (exon-exon) 10:35201131-35201071 60.0 Brown rat
intergenic/1:207344523-207344542-207363883-207363902--/. intergenic Na -/. intergenic 1:207344523-207363883 19360.0 Brown rat
intergenic/13:109065096-109065097-109051937-109051938-+/. intergenic Na +/. intergenic 13:109065096-109051937 13159.0 Brown rat
Ubb/10:47748245-47748250-47747561-47747566-+/+ Ubb protein_coding +/+ interior 10:47748245-47747561 684.0 Brown rat
Upf2/17:77205399-77205400-77223914-77223915--/- Upf2 protein_coding -/- interior 17:77205400-77223915 18515.0 Brown rat
intergenic/1:207337080-207337084-207348634-207348638--/. intergenic Na -/. intergenic 1:207337084-207348638 11554.0 Brown rat
Rn28s/11:484763-484766-485557-485560--/- Rn28s rRNA -/- interior 11:484766-485560 794.0 Brown rat
Klhl8/14:6133492-6133494-6129488-6129490-+/+ Klhl8 protein_coding +/+ canonical (exon-exon) 14:6133492-6129488 4004.0 Brown rat
Gtf2i/12:28062341-28062342-28058460-28058461-+/+ Gtf2i protein_coding +/+ canonical (exon-exon) 12:28062341-28058460 3881.0 Brown rat