19-49157896-C-G

Position:

• chr19-49157896-C-G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_017636.4(TRPM4):​c.24+6C>G variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000964 in 1,534,936 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 Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00012 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000094 (0 hom.)
• Consequence: TRPM4 NM_017636.4 splice_donor_region, intron
• Scores: Splicing: ADA: 0.0002703
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:3
• Conservation: PhyloP100: 0.266

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]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BP6: Variant 19-49157896-C-G is Benign according to our data. Variant chr19-49157896-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 389832.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}. Variant chr19-49157896-C-G is described in Lovd as [Likely_benign].
• BS2: High AC in GnomAd4 at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRPM4	NM_017636.4	c.24+6C>G		splice_donor_region_variant, intron_variant		ENST00000252826.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRPM4	ENST00000252826.10	c.24+6C>G		splice_donor_region_variant, intron_variant		1	NM_017636.4	P1

Frequencies

GnomAD3 genomes AF: 0.000118 AC: 18 AN: 152138 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000965

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000797 AC: 11 AN: 137972 Hom.: 0 AF XY: 0.0000272 AC XY: 2 AN XY: 73634

Gnomad AFR exome AF: 0.000125

Gnomad AMR exome AF: 0.000122

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000131

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000940 AC: 130 AN: 1382798 Hom.: 0 Cov.: 33 AF XY: 0.0000850 AC XY: 58 AN XY: 682402

Gnomad4 AFR exome AF: 0.0000317

Gnomad4 AMR exome AF: 0.000168

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000871

Gnomad4 NFE exome AF: 0.000107

Gnomad4 OTH exome AF: 0.0000865

GnomAD4 genome AF: 0.000118 AC: 18 AN: 152138 Hom.: 0 Cov.: 31 AF XY: 0.000148 AC XY: 11 AN XY: 74302

Gnomad4 AFR AF: 0.0000965

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000942

Gnomad4 NFE AF: 0.000176

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000277 Hom.: 0

Bravo AF: 0.0000945

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:3

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Benign:3

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 31, 2020	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Progressive familial heart block type IB Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Dec 25, 2023

This sequence change falls in intron 1 of the TRPM4 gene. It does not directly change the encoded amino acid sequence of the TRPM4 protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs767900879, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with TRPM4-related conditions. ClinVar contains an entry for this variant (Variation ID: 389832). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	13
DANN	Benign	0.75

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00027
dbscSNV1_RF	Benign	0.044
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

LitVar

Other links and lift over

dbSNP: rs767900879; hg19: chr19-49661153;