NCBI taxid 103944
✓ Has minor (U12-type) introns
647 high-confidence minor introns · 683 including lower-confidence candidates (score 50–90) · snRNA machinery: corroborated· proteome BUSCO 96.4%
Download this genome's introns: minor introns (CSV) · all introns (BED)

genomes: 103944

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
103944 Protobothrops mucrosquamatus brown spotted pit viper vertebrates Chordata Squamata Viperidae U12_POSITIVE 647 0.40% 97.95 683 171,499 DETECTED 319.4579970866265 643 4 corroborated U11, U12, U4atac, U6atac 4 4.9e-22 1.8e-33 5.6e-20 4e-30 22,391 172,182 1,673,876,332 39.966 47.568 52,280 424,052 924 96.4 GCF_001527695.2 P.Mucros_1.0 refseq https://www.ncbi.nlm.nih.gov/datasets/genome/GCF_001527695.2/ https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=103944 https://en.wikipedia.org/wiki/Protobothrops_mucrosquamatus species
protobothrops mucrosquamatus;protobothrops;crotalinae;viperidae;colubroidea;serpentes;toxicofera;episquamata;unidentata;bifurcata;squamata;lepidosauria;sauria;sauropsida;amniota;tetrapoda;dipnotetrapodomorpha;sarcopterygii;euteleostomi;teleostomi;gnathostomata;vertebrata;craniata;chordata;deuterostomia;bilateria;eumetazoa;metazoa;opisthokonta;eukaryota;cellular organisms
 vertebrates/refseq/protobothrops_mucrosquamatus-P.Mucros_1.0/protobothrops_mucrosquamatus.GCF_001527695.2_P.Mucros_1.0_genomic.fna.gz vertebrates/refseq/protobothrops_mucrosquamatus-P.Mucros_1.0/protobothrops_mucrosquamatus.GCF_001527695.2_P.Mucros_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 Protobothrops mucrosquamatus

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 Protobothrops mucrosquamatus

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 Protobothrops mucrosquamatus

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.