rs779788281

Variant names:

• chr5-45695893-A-C
• rs779788281
• NM_021072.4:c.201T>G

Your query was ambiguous. Multiple possible variants found:

• chr5-45695893-A-C
• chr5-45695893-A-G
• chr5-45695893-A-T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_021072.4(HCN1):​c.201T>G​(p.Gly67Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. G67G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HCN1 NM_021072.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.00
• Publications: 0 publications found

Genes affected

HCN1 (HGNC:4845): (hyperpolarization activated cyclic nucleotide gated potassium channel 1) The membrane protein encoded by this gene is a hyperpolarization-activated cation channel that contributes to the native pacemaker currents in heart and neurons. The encoded protein can homodimerize or heterodimerize with other pore-forming subunits to form a potassium channel. This channel may act as a receptor for sour tastes. [provided by RefSeq, Oct 2011]

HCN1 Gene-Disease associations (from GenCC):

• developmental and epileptic encephalopathy, 24

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• generalized epilepsy with febrile seizures plus

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• generalized epilepsy with febrile seizures plus, type 10

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP7: Synonymous conserved (PhyloP=0 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HCN1	NM_021072.4	c.201T>G	p.Gly67Gly	synonymous_variant	Exon 1 of 8	ENST00000303230.6	NP_066550.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HCN1	ENST00000303230.6	c.201T>G	p.Gly67Gly	synonymous_variant	Exon 1 of 8	1	NM_021072.4	ENSP00000307342.4
HCN1	ENST00000673735.1	c.201T>G	p.Gly67Gly	synonymous_variant	Exon 1 of 9			ENSP00000501107.1
HCN1	ENST00000634658.1	c.201T>G	p.Gly67Gly	synonymous_variant	Exon 1 of 2	3		ENSP00000489134.1
HCN1	ENST00000638054.1	n.-168T>G		upstream_gene_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	11
DANN	Benign	0.62
PhyloP100		0.0
PromoterAI		-0.024	Neutral

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: rs779788281; hg19: chr5-45695995;