NM_006172.4:c.425G>C

Variant names:

• chr1-11847138-C-G
• rs781197146
• NM_006172.4:c.425G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006172.4(NPPA):​c.425G>C​(p.Ser142Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000142 in 1,407,814 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. S142N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NPPA NM_006172.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.20
• Publications: 0 publications found

Genes affected

NPPA (HGNC:7939): (natriuretic peptide A) The protein encoded by this gene belongs to the natriuretic peptide family. Natriuretic peptides are implicated in the control of extracellular fluid volume and electrolyte homeostasis. This protein is synthesized as a large precursor (containing a signal peptide), which is processed to release a peptide from the N-terminus with similarity to vasoactive peptide, cardiodilatin, and another peptide from the C-terminus with natriuretic-diuretic activity. Mutations in this gene have been associated with atrial fibrillation familial type 6. This gene is located adjacent to another member of the natriuretic family of peptides on chromosome 1. [provided by RefSeq, Oct 2015]

CLCN6 (HGNC:2024): (chloride voltage-gated channel 6) This gene encodes a member of the voltage-dependent chloride channel protein family. Members of this family can function as either chloride channels or antiporters. This protein is primarily localized to late endosomes and functions as a chloride/proton antiporter. Alternate splicing results in both coding and non-coding variants. Additional alternately spliced variants have been described but their full-length structure is unknown. [provided by RefSeq, Mar 2012]

NPPA-AS1 (HGNC:37635): (NPPA antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.873

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006172.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPPA	NM_006172.4	MANE Select	c.425G>C	p.Ser142Thr	missense	Exon 2 of 3	NP_006163.1
	NPPA-AS1	NR_037806.1		n.1480-296C>G		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPPA	ENST00000376480.7	TSL:1 MANE Select	c.425G>C	p.Ser142Thr	missense	Exon 2 of 3	ENSP00000365663.3
	CLCN6	ENST00000446542.5	TSL:1	n.782-296C>G		intron	N/A
	NPPA	ENST00000376476.1	TSL:3	c.275G>C	p.Ser92Thr	missense	Exon 2 of 3	ENSP00000365659.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000142 AC: 2 AN: 1407814 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 694678

African (AFR) AF: 0.00 AC: 0 AN: 31694

American (AMR) AF: 0.00 AC: 0 AN: 36584

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22596

East Asian (EAS) AF: 0.00 AC: 0 AN: 39098

South Asian (SAS) AF: 0.0000127 AC: 1 AN: 78992

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51720

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5494

European-Non Finnish (NFE) AF: 9.23e-7 AC: 1 AN: 1083748

Other (OTH) AF: 0.00 AC: 0 AN: 57888

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.28	T
Eigen	Pathogenic	0.84
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.050	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	0.40	D
PhyloP100		5.2
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.55
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.79
MutPred		0.74		Loss of glycosylation at S142 (P = 0.0192)
MVP		0.99
MPC		0.18
ClinPred		0.99	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.54
Mutation Taster		=76/24	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: rs781197146; hg19: chr1-11907195;