rs137852705

Variant names:

• chr16-23380731-C-G
• rs137852705
• NM_000336.3:c.1853C>G

Your query was ambiguous. Multiple possible variants found:

• chr16-23380731-C-G
• chr16-23380731-C-T

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_000336.3(SCNN1B):​c.1853C>G​(p.Pro618Arg) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P618S) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SCNN1B NM_000336.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.00
• Publications: 5 publications found

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]

SCNN1B Gene-Disease associations (from GenCC):

• Liddle syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• pseudohypoaldosteronism, type IB2, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE Submitted by: Ambry Genetics
• bronchiectasis with or without elevated sweat chloride 1

  Inheritance: AD, SD Classification: STRONG, LIMITED Submitted by: PanelApp Australia, Ambry Genetics
• pseudohypoaldosteronism, type IB1, autosomal recessive

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• Liddle syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_000336.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-23380730-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 805492.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.911

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000336.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCNN1B	NM_000336.3	MANE Select	c.1853C>G	p.Pro618Arg	missense	Exon 13 of 13	NP_000327.2
	SCNN1B	NM_001410900.1		c.1745C>G	p.Pro582Arg	missense	Exon 12 of 12	NP_001397829.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCNN1B	ENST00000343070.7	TSL:1 MANE Select	c.1853C>G	p.Pro618Arg	missense	Exon 13 of 13	ENSP00000345751.2
	SCNN1B	ENST00000307331.9	TSL:5	c.1988C>G	p.Pro663Arg	missense	Exon 14 of 14	ENSP00000302874.5
	SCNN1B	ENST00000568923.5	TSL:3	c.1772C>G	p.Pro591Arg	missense	Exon 12 of 12	ENSP00000456309.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.79	D
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.14	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		6.0
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-7.0	D
REVEL	Pathogenic	0.82
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.83
MutPred		0.72		Loss of glycosylation at P618 (P = 0.0152)
MVP		0.95
MPC		0.65
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.82
gMVP		0.81
Mutation Taster		=0/100	disease causing

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: rs137852705; hg19: chr16-23392052;