chr16-23380736-T-C

Position:

• chr16-23380736-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP3 PP5

The NM_000336.3(SCNN1B):​c.1858T>C​(p.Tyr620His) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y620C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SCNN1B NM_000336.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 5.74

Genes affected

SCNN1B (HGNC:10600): (sodium channel epithelial 1 subunit beta) Nonvoltage-gated, amiloride-sensitive, sodium channels control fluid and electrolyte transport across epithelia in many organs. These channels are heteromeric complexes consisting of 3 subunits: alpha, beta, and gamma. This gene encodes the beta subunit, and mutations in this gene have been associated with pseudohypoaldosteronism type 1 (PHA1), and Liddle syndrome. [provided by RefSeq, Apr 2009]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in NM_000336.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.789
• PP5: Variant 16-23380736-T-C is Pathogenic according to our data. Variant chr16-23380736-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 8833.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCNN1B	NM_000336.3	c.1858T>C	p.Tyr620His	missense_variant	13/13	ENST00000343070.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCNN1B	ENST00000343070.7	c.1858T>C	p.Tyr620His	missense_variant	13/13	1	NM_000336.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Liddle syndrome 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Apr 01, 1996

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.82	D;.;.;.
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.92	D;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.79	D;D;D;D
MetaSVM	Uncertain	0.16	D
MutationAssessor	Uncertain	2.8	M;.;.;.
MutationTaster	Benign	1.0	A;A;A;A
PrimateAI	Uncertain	0.77	T
PROVEAN	Uncertain	-3.9	D;D;D;D
REVEL	Pathogenic	0.76
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		1.0	D;.;.;.
Vest4		0.79
MutPred		0.59		Loss of phosphorylation at Y620 (P = 0.0205);.;.;.;
MVP		0.93
MPC		0.73
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.75
gMVP		0.67

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

LitVar

Other links and lift over

dbSNP: rs137852707; hg19: chr16-23392057;