19-49157879-G-C

Variant names:

• chr19-49157879-G-C
• rs999572673
• NM_017636.4:c.13G>C

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_017636.4(TRPM4):​c.13G>C​(p.Glu5Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000579 in 1,382,782 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E5K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000058 (0 hom.)
• Consequence: TRPM4 NM_017636.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.16
• Publications: 0 publications found

Genes affected

TRPM4 (HGNC:17993): (transient receptor potential cation channel subfamily M member 4) The protein encoded by this gene is a calcium-activated nonselective ion channel that mediates transport of monovalent cations across membranes, thereby depolarizing the membrane. The activity of the encoded protein increases with increasing intracellular calcium concentration, but this channel does not transport calcium. [provided by RefSeq, Mar 2016]

TRPM4 Gene-Disease associations (from GenCC):

• erythrokeratodermia variabilis et progressiva 6

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• progressive familial heart block type IB

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
• erythrokeratodermia variabilis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• progressive familial heart block

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Brugada syndrome

  Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.21762732).
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRPM4	NM_017636.4	c.13G>C	p.Glu5Gln	missense_variant	Exon 1 of 25	ENST00000252826.10	NP_060106.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRPM4	ENST00000252826.10	c.13G>C	p.Glu5Gln	missense_variant	Exon 1 of 25	1	NM_017636.4	ENSP00000252826.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000579 AC: 8 AN: 1382782 Hom.: 0 Cov.: 33 AF XY: 0.00000733 AC XY: 5 AN XY: 682348

African (AFR) AF: 0.00 AC: 0 AN: 31552

American (AMR) AF: 0.00 AC: 0 AN: 35666

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25154

East Asian (EAS) AF: 0.00 AC: 0 AN: 35738

South Asian (SAS) AF: 0.00 AC: 0 AN: 79146

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34278

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5024

European-Non Finnish (NFE) AF: 0.00000649 AC: 7 AN: 1078432

Other (OTH) AF: 0.0000173 AC: 1 AN: 57792

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Progressive familial heart block type IB Uncertain:1

Sep 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 5 of the TRPM4 protein (p.Glu5Gln). This variant is present in population databases (no rsID available, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with TRPM4-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Cardiovascular phenotype Uncertain:1

Apr 12, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.E5Q variant (also known as c.13G>C), located in coding exon 1 of the TRPM4 gene, results from a G to C substitution at nucleotide position 13. The glutamic acid at codon 5 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.081	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.10	T;T;T;.
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.26
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.72	T;T;T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.22	T;T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.4	.;L;.;L
PhyloP100		2.2
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.81	.;N;.;N
REVEL	Benign	0.16
Sift	Benign	0.18	.;T;.;T
Sift4G	Benign	0.35	T;T;D;T
Polyphen		0.14, 0.047	.;B;.;B
Vest4		0.20, 0.11, 0.17
MutPred		0.20		Loss of ubiquitination at K6 (P = 0.0511);Loss of ubiquitination at K6 (P = 0.0511);Loss of ubiquitination at K6 (P = 0.0511);Loss of ubiquitination at K6 (P = 0.0511);
MVP		0.76
MPC		0.86
ClinPred		0.79	D
GERP RS		3.2
PromoterAI		-0.063	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.31
Mutation Taster		=260/40	polymorphism

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: rs999572673; hg19: chr19-49661136;