chr3-156093495-A-T

Variant names:

• chr3-156093495-A-T
• rs1984473
• ENST00000472028.5:c.-100-24716A>T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The ENST00000472028.5(KCNAB1):​c.-100-24716A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00247 in 152,092 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0025 (3 hom., cov: 32)
• Consequence: KCNAB1 ENST00000472028.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.260

Genes affected

KCNAB1 (HGNC:6228): (potassium voltage-gated channel subfamily A regulatory beta subunit 1) Potassium channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. This member includes distinct isoforms which are encoded by alternatively spliced transcript variants of this gene. Some of these isoforms are beta subunits, which form heteromultimeric complexes with alpha subunits and modulate the activity of the pore-forming alpha subunits. [provided by RefSeq, Apr 2015]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BS2: High Homozygotes in GnomAd4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNAB1	ENST00000472028.5	c.-100-24716A>T		intron_variant	Intron 1 of 8	4		ENSP00000420755.1
KCNAB1	ENST00000477912.5	n.46-24716A>T		intron_variant	Intron 1 of 9	4
KCNAB1	ENST00000478609.5	n.46-24716A>T		intron_variant	Intron 1 of 3	4

Frequencies

GnomAD3 genomes AF: 0.00247 AC: 375 AN: 151976 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.000725

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00229

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000853

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00434

Gnomad OTH AF: 0.00239

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00247 AC: 375 AN: 152092 Hom.: 3 Cov.: 32 AF XY: 0.00233 AC XY: 173 AN XY: 74344

Gnomad4 AFR AF: 0.000723

Gnomad4 AMR AF: 0.00229

Gnomad4 ASJ AF: 0.000288

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000853

Gnomad4 NFE AF: 0.00434

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.000209 Hom.: 7043

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.45
DANN	Benign	0.69

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1984473; hg19: chr3-155811284;