Table 3.

Details of N2 genes, AUGUSTUS protein-coding genes, and StringTie transcripts

Gene categoryGene number
All protein-coding genes in N219,972
Encoded protein spectra9508 (47.6% of all)
Could not be mapped onto CGC1 genome75
Could not be mapped; micropeptides49
Could not be mapped; micropeptides with StringTie2 matches24
Could not be mapped; had AUGUSTUS orthologs26
Could not be mapped; had AUGUSTUS orthologs and StringTie2 matches14
Could not be mapped; had unique AUGUSTUS orthologs15
Could not be mapped; encoded protein spectra3
Mapped onto CGC1 genome19,897
Mapped; overlapped StringTie2 transcripts18,755 (93.8% of mapped)
Mapped; overlapped AUGUSTUS genes19,427 (97.6% of mapped)
Overlapped AUGUSTUS genes with CGC1-specific exons46
Could not be translated after mapping24
Not translated but overlapped AUGUSTUS genes22 (91.7% of 24)
Could be translated but only with an altered product83
Only altered translation but overlapped AUGUSTUS predictions79 (95.2% of 83)
Encoded at least one protein identical to N219,790 (99.1% of all)
All ncRNA genes in N224,788
Could not be mapped onto CGC1 genome3
Mapped onto CGC1 genome24,785
Mapped; overlapped StringTie2 transcripts5173 (20.9% of mapped)
Could be transcribed but only with an altered product194
Encoded at least one transcript identical to N224,591 (99.2% of all)
All pseudogenes in N22131
Could not be mapped onto CGC1 genome4
Mapped onto CGC1 genome2127
Could be transcribed but only with an altered product35
Encoded at least one transcript identical to N22092 (98.2% of all)
All AUGUSTUS protein-coding genes in CGC1 genome21,238
Encoded protein spectra9640 (45.4% of all)
Overlapped StringTie2 transcripts19,746 (93.0% of all)
Overlapped N2 protein-coding genes19,232 (90.6% of all)
Did not overlap N2 protein-coding genes2006 (9.4% of all)
No N2 prot.-cod. gene overlap; overlapped only N2 DNA1779
Met criteria for new genes; overlapped only N2 DNA314
Met criteria; only N2 DNA; overlapped StringTie2 transcripts201 (64.0% of 314)
Met criteria; only N2 DNA; encoded protein spectra12 (3.8% of 314)
No N2 prot.-cod. gene overlap; overlapped CGC1-specific DNA227
Met criteria for new genes; overlapped CGC1-specific DNA183
New genes; CGC1-specific DNA; overlapped StringTie2 transcripts150 (82.0% of 183)
New genes; CGC1-specific DNA; encoded protein spectra13 (7.1% of 183)
All genomic loci encoding StringTie2 transcripts in CGC123,249
Overlapped N2 protein-coding genes16,961 (73.0% of all)
Overlapped N2 ncRNA genes2745 (11.8% of all)
Overlapped AUGUSTUS protein-coding genes18,059 (77.7% of all)
Not overlapping N2 or AUGUSTUS genes3868 (16.6% of all)
No N2/AUGUSTUS overlap; overlapped only N2 DNA; did not encode any ncRNA motifs from Rfam3693
No N2/AUGUSTUS overlap; overlapped CGC1-specific DNA; did not encode any ncRNA motifs from Rfam163

[i] We mapped nuclear (nonmitochondrial) N2 genes from the WS292 release of WormBase (Sternberg et al. 2024) to the CGC1 assembly as three sets: protein-coding, ncRNA, and pseudogenes. Of the 75 unmapped N2 protein-coding genes, 49 encoded micropeptides of nine to 15 amino acids (Olexiouk et al. 2018) that made them difficult to map. The other 26 unmapped N2 genes, which encoded proteins of 100 or more amino acids, all had orthologs among the AUGUSTUS gene predictions; of these, 15 were unique (1:1), whereas 11 were two to 13 AUGUSTUS genes each. We tested all unmapped genes for 100% full-length matches to StringTie2 transcripts in the CGC1 genome.