2-231925493-C-G

Position:

• chr2-231925493-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_024409.4(NPPC):​c.313G>C​(p.Gly105Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 34)
• Consequence: NPPC NM_024409.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.92

Genes affected

NPPC (HGNC:7941): (natriuretic peptide C) This gene encodes a preproprotein that is proteolytically processed to generate multiple protein products. These products include the cardiac natriuretic peptides CNP-53, CNP-29 and CNP-22, which belong to the natriuretic family of peptides. The encoded peptides exhibit vasorelaxation activity in laboratory animals and elevated levels of CNP-22 have been observed in the plasma of chronic heart failure patients. [provided by RefSeq, Oct 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NPPC	NM_024409.4	c.313G>C	p.Gly105Arg	missense_variant	2/3	ENST00000409852.2	NP_077720.1
NPPC	XM_011511245.4	c.313G>C	p.Gly105Arg	missense_variant	2/3		XP_011509547.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NPPC	ENST00000409852.2	c.313G>C	p.Gly105Arg	missense_variant	2/3	3	NM_024409.4	ENSP00000387159	P1
NPPC	ENST00000295440.2	c.313G>C	p.Gly105Arg	missense_variant	2/2	1		ENSP00000295440	P1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 22, 2021

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Not Available"). This variant has not been reported in the literature in individuals with NPPC-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with arginine at codon 105 of the NPPC protein (p.Gly105Arg). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and arginine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Benign	-0.086	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	D;D
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Benign	0.51	D
LIST_S2	Uncertain	0.87	.;D
M_CAP	Benign	0.058	D
MetaRNN	Uncertain	0.54	D;D
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.6	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-5.3	D;D
REVEL	Benign	0.25
Sift	Benign	0.070	T;T
Sift4G	Benign	0.11	T;T
Polyphen		0.99	D;D
Vest4		0.38
MutPred		0.53		Gain of methylation at G105 (P = 0.0404);Gain of methylation at G105 (P = 0.0404);
MVP		0.82
MPC		1.5
ClinPred		0.99	D
GERP RS		4.1
Varity_R		0.66
gMVP		0.52

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-232790203;