1-100206309-T-TAAAA

Variant names:

• chr1-100206309-T-TAAAA
• NM_001918.5:c.1210-9_1210-8insTTTT

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001918.5(DBT):​c.1210-9_1210-8insTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000769 in 1,300,892 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 7.7e-7 (0 hom.)
• Consequence: DBT NM_001918.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.732

Genes affected

DBT (HGNC:2698): (dihydrolipoamide branched chain transacylase E2) The branched-chain alpha-keto acid dehydrogenase complex (BCKD) is an inner-mitochondrial enzyme complex involved in the breakdown of the branched-chain amino acids isoleucine, leucine, and valine. The BCKD complex is thought to be composed of a core of 24 transacylase (E2) subunits, and associated decarboxylase (E1), dehydrogenase (E3), and regulatory subunits. This gene encodes the transacylase (E2) subunit. Mutations in this gene result in maple syrup urine disease, type 2. Alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DBT	NM_001918.5	c.1210-9_1210-8insTTTT		intron_variant	Intron 9 of 10	ENST00000370132.8	NP_001909.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DBT	ENST00000370132.8	c.1210-9_1210-8insTTTT		intron_variant	Intron 9 of 10	1	NM_001918.5	ENSP00000359151.3
DBT	ENST00000681617.1	c.1336-9_1336-8insTTTT		intron_variant	Intron 10 of 11			ENSP00000505544.1
DBT	ENST00000681780.1	c.667-9_667-8insTTTT		intron_variant	Intron 10 of 11			ENSP00000505780.1

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome AF: 7.69e-7 AC: 1 AN: 1300892 Hom.: 0 Cov.: 29 AF XY: 0.00000154 AC XY: 1 AN XY: 650270

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000125

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-100671865;