rs754439480

Variant names:

• chr14-62950200-T-A
• rs754439480
• NM_139318.5:c.1302A>T

Your query was ambiguous. Multiple possible variants found:

• chr14-62950200-T-A
• chr14-62950200-T-G

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_139318.5(KCNH5):​c.1302A>T​(p.Gly434Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G434G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: KCNH5 NM_139318.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.48
• 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: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP7: Synonymous conserved (PhyloP=1.48 with no splicing effect.

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.1302A>T	p.Gly434Gly	synonymous	Exon 7 of 11	NP_647479.2
	KCNH5	NM_172375.3		c.1302A>T	p.Gly434Gly	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.1302A>T	p.Gly434Gly	synonymous	Exon 7 of 11	ENSP00000321427.7
	KCNH5	ENST00000420622.6	TSL:1	c.1302A>T	p.Gly434Gly	synonymous	Exon 7 of 10	ENSP00000395439.2
	KCNH5	ENST00000394964.3	TSL:1	n.1467A>T		non_coding_transcript_exon	Exon 7 of 7

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461730 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727164

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39682

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111912

Other (OTH) AF: 0.00 AC: 0 AN: 60386

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	9.9
DANN	Benign	0.73
PhyloP100		1.5

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs754439480; hg19: chr14-63416918;