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Species: Human
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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
5_8S_rRNA::intergenic/GL000220.1:156077-156078-110536-110537-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156078-110537 45541.0 Human
5_8S_rRNA::intergenic/GL000220.1:156077-156078-114247-114248-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156078-114248 41830.0 Human
5_8S_rRNA::intergenic/GL000220.1:156077-156078-114361-114362-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156077-114361 41716.0 Human
5_8S_rRNA::intergenic/GL000220.1:156078-156079-112022-112023-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156079-112023 44056.0 Human
5_8S_rRNA::intergenic/GL000220.1:156080-156082-115744-115746-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156082-115746 40336.0 Human
5_8S_rRNA::intergenic/GL000220.1:156086-156086-109414-109414-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156086-109414 46672.0 Human
5_8S_rRNA::intergenic/GL000220.1:156137-156142-109682-109687-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156137-109682 46455.0 Human
5_8S_rRNA::intergenic/KI270733.1:174032-174033-134733-134734-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174033-134734 39299.0 Human
5_8S_rRNA::intergenic/KI270733.1:174034-174034-171046-171046-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174034-171046 2988.0 Human
5_8S_rRNA::intergenic/KI270733.1:174035-174035-127382-127382-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174035-127382 46653.0 Human