19-590037-C-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_001194.4(HCN2):​c.92C>A​(p.Pro31His) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 20)
Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

HCN2
NM_001194.4 missense

Scores

2
4
13

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.12
Variant links:
Genes affected
HCN2 (HGNC:4846): (hyperpolarization activated cyclic nucleotide gated potassium and sodium channel 2) The protein encoded by this gene is a hyperpolarization-activated cation channel involved in the generation of native pacemaker activity in the heart and in the brain. The encoded protein is activated by cAMP and can produce a fast, large current. Defects in this gene were noted as a possible cause of some forms of epilepsy. [provided by RefSeq, Jan 2017]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=0.20293239).
BS1
Variant frequency is greater than expected in population afr. gnomad4_exome allele frequency = 0.00000823 (4/486268) while in subpopulation AFR AF= 0.000215 (2/9312). AF 95% confidence interval is 0.0000374. There are 0 homozygotes in gnomad4_exome. There are 2 alleles in male gnomad4_exome subpopulation. Median coverage is 6. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
HCN2NM_001194.4 linkc.92C>A p.Pro31His missense_variant 1/8 ENST00000251287.3 NP_001185.3

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
HCN2ENST00000251287.3 linkc.92C>A p.Pro31His missense_variant 1/81 NM_001194.4 ENSP00000251287.1 Q9UL51

Frequencies

GnomAD3 genomes
Cov.:
20
GnomAD4 exome
AF:
0.00000823
AC:
4
AN:
486268
Hom.:
0
Cov.:
6
AF XY:
0.00000878
AC XY:
2
AN XY:
227700
show subpopulations
Gnomad4 AFR exome
AF:
0.000215
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00000450
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
20

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsMay 02, 2024The c.92C>A (p.P31H) alteration is located in exon 1 (coding exon 1) of the HCN2 gene. This alteration results from a C to A substitution at nucleotide position 92, causing the proline (P) at amino acid position 31 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.18
BayesDel_addAF
Uncertain
0.016
T
BayesDel_noAF
Benign
-0.22
CADD
Benign
19
DANN
Benign
0.94
DEOGEN2
Benign
0.23
T
Eigen
Benign
-0.78
Eigen_PC
Benign
-0.89
FATHMM_MKL
Benign
0.016
N
LIST_S2
Benign
0.20
T
M_CAP
Pathogenic
0.87
D
MetaRNN
Benign
0.20
T
MetaSVM
Uncertain
0.051
D
MutationAssessor
Benign
0.55
N
PrimateAI
Uncertain
0.68
T
PROVEAN
Benign
-0.13
N
REVEL
Benign
0.29
Sift
Pathogenic
0.0
D
Sift4G
Uncertain
0.0080
D
Polyphen
0.84
P
Vest4
0.14
MutPred
0.23
Loss of glycosylation at P31 (P = 0.0111);
MVP
0.49
MPC
1.7
ClinPred
0.15
T
GERP RS
1.1
Varity_R
0.15
gMVP
0.24

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-590037; API