14-62950365-G-A

Variant names:

• chr14-62950365-G-A
• rs767226876
• NM_139318.5:c.1137C>T

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_Moderate BP6_Moderate BP7 BS1 BS2

The NM_139318.5(KCNH5):​c.1137C>T​(p.Val379Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000103 in 1,461,794 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: KCNH5 NM_139318.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.285
• Publications: 0 publications found

Genes affected

KCNH5 (HGNC:6254): (potassium voltage-gated channel subfamily H member 5) This gene encodes a member of voltage-gated potassium channels. Members of this family have diverse functions, including regulating neurotransmitter and hormone release, cardiac function, and cell volume. This protein is an outward-rectifying, noninactivating channel. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

KCNH5 Gene-Disease associations (from GenCC):

• infantile-onset epilepsy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy 112

  Inheritance: AD Classification: STRONG Submitted by: G2P

ACMG classification

Our verdict: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.46).
• BP6: Variant 14-62950365-G-A is Benign according to our data. Variant chr14-62950365-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 461385.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.285 with no splicing effect.
• BS1: Variant frequency is greater than expected in population amr. GnomAdExome4 allele frequency = 0.0000103 (15/1461794) while in subpopulation AMR AF = 0.000313 (14/44714). AF 95% confidence interval is 0.000189. There are 0 homozygotes in GnomAdExome4. There are 5 alleles in the male GnomAdExome4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAdExome4 at 15 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_139318.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNH5	NM_139318.5	MANE Select	c.1137C>T	p.Val379Val	synonymous	Exon 7 of 11	NP_647479.2
	KCNH5	NM_172375.3		c.1137C>T	p.Val379Val	synonymous	Exon 7 of 10	NP_758963.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNH5	ENST00000322893.12	TSL:1 MANE Select	c.1137C>T	p.Val379Val	synonymous	Exon 7 of 11	ENSP00000321427.7
	KCNH5	ENST00000420622.6	TSL:1	c.1137C>T	p.Val379Val	synonymous	Exon 7 of 10	ENSP00000395439.2
	KCNH5	ENST00000394964.3	TSL:1	n.1302C>T		non_coding_transcript_exon	Exon 7 of 7

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.0000438 AC: 11 AN: 250862 AF XY: 0.0000221

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000318

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000103 AC: 15 AN: 1461794 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 727198

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.000313 AC: 14 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111962

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000416

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Developmental and epileptic encephalopathy Benign:1

Oct 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	5.7
DANN	Benign	0.64
PhyloP100		0.28

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs767226876; hg19: chr14-63417083;