NCBI taxid 105358
✓ Has minor (U12-type) introns
1,126 high-confidence minor introns · 1,183 including lower-confidence candidates (score 50–90) · snRNA machinery: corroborated· proteome BUSCO 99.2%
Download this genome's introns: minor introns (CSV) · all introns (BED)

genomes: 105358

One row per species (2,634 genomes) — start here to look up an organism. Each row carries its minor-intron verdict (u12_status), high-confidence and total U12-type intron counts, snRNA status, and proteome completeness (BUSCO); click the taxonomy_id or species name to open its full genome page. Featured views: U12-type loss landscape U12-type % vs genome size U12-type intron count vs proteome BUSCO Minor vs total introns

Data license: ODbL · Data source: Larue & Roy, 2023

This data as json

taxonomy_id species common_name group phylum order family u12_status n_minor_introns percent_minor_introns u12_density_percentile n_u12_all n_major_introns motif_category z_excess hc_u12_cds hc_u12_exon snrna_status minor_snrnas n_minor_snrna u11_E u12_E u4atac_E u6atac_E total_genes total_introns_scored genome_size_bp gc_content coding_gc_content n_contigs assembly_n50 assembly_l50 busco_score accession genome_version source assembly_url ncbi_taxonomy_url wikipedia_url common_name_level taxonomy genome_path annotation_path
105358 Diadema antillarum sea urchin invertebrates Echinodermata Diadematoida Diadematidae U12_POSITIVE 1,126 0.42% 99.28 1,183 282,764 DETECTED 560.2222855524226 1,102 24 corroborated U11, U12, U4atac, U6atac 4 1.6e-21 5.7e-28 2.9e-17 3.6e-34 37,758 283,947 1,754,659,819 38.478 52.188 2,963 1,566,639 317 99.2 GCF_040938485.1 OU_Dant_1.0 refseq https://www.ncbi.nlm.nih.gov/datasets/genome/GCF_040938485.1/ https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=105358 https://en.wikipedia.org/wiki/Diadema_antillarum group
Diadema antillarum;Diadema;Diadematidae;Diadematoida;Acroechinoidea;Euechinoidea;Echinoidea;Echinozoa;Eleutherozoa;Echinodermata;Deuterostomia;Bilateria;Eumetazoa;Metazoa;Opisthokonta;Eukaryota;cellular organisms
 invertebrates/refseq/diadema_antillarum-OU_Dant_1.0/diadema_antillarum.GCF_040938485.1_OU_Dant_1.0_genomic.fna.gz invertebrates/refseq/diadema_antillarum-OU_Dant_1.0/diadema_antillarum.GCF_040938485.1_OU_Dant_1.0_genomic.gff.gz

Links from other tables

Filter introns: U12-type set: Introns are called on the longest isoform per gene.

Splice-site logos for Diadema antillarum

Rendered in the browser from motif_pwm counts via the Schneider-Stephens / WebLogo 3 information formula. The U12-type set control in the filter bar above switches the U12-type population — in these logos and every distribution chart below — between high-confidence calls (adjusted score ≥ 90) and motif-positive introns (p_motif ≥ 0.5: every intron whose splice-signal motif is U12-like, even where the genome made few or no calls). U2-type is the fixed genome-wide background.

Y-axis:

U12-type introns

U2-type introns

Intron distributions for Diadema antillarum

Pre-aggregated from the full intron set (intron_stats); rendered client-side with Vega-Lite. Bars are grouped by set (U12-type = green, U2-type = gray).

Phase
Intron termini
Intron location
CDSexon
Score (intronIC, 0-100)
Intron length
Branch-point offset (nt to 3′SS)
Relative position in transcript (%)

Motif-score model for Diadema antillarum

intronIC's per-species tail model: the U2-type (major) background motif-score distribution (gray, log-scaled) in p_motif space, its extrapolated exponential tail (dashed — how far U2-type scores are expected to reach by chance), and the U12-type calls (green, p_motif ≥ 0.9). Calls sitting far to the right of the U2-type tail are the evidence for a genuine minor-spliceosome population.