7-34658489-G-A

Position:

• chr7-34658489-G-A

Variant summary

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

The NM_207172.2(NPSR1):​c.77G>A​(p.Cys26Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,808 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NPSR1 NM_207172.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.12

Genes affected

NPSR1 (HGNC:23631): (neuropeptide S receptor 1) This gene encodes a member of the vasopressin/oxytocin subfamily of G protein-coupled receptors. The encoded membrane protein acts as a receptor for neuropeptide S and affects a variety of cellular processes through its signaling. Increased expression of this gene in ciliated cells of the respiratory epithelium and in bronchial smooth muscle cells is associated with asthma. Polymorphisms in this gene have also been associated with asthma susceptibility, panic disorders, inflammatory bowel disease, and rheumatoid arthritis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

NPSR1-AS1 (HGNC:22128): (NPSR1 antisense RNA 1) This gene is located within a region that has been associated with asthma susceptibility. The locus is considered non-protein-coding based on lack of protein homology and a lack of experimental support for an encoded protein. Three alternatively spliced transcript variants have been identified for this gene. [provided by RefSeq, May 2010]

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
NPSR1	NM_207172.2	c.77G>A	p.Cys26Tyr	missense_variant	1/9	ENST00000360581.6	NP_997055.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NPSR1	ENST00000360581.6	c.77G>A	p.Cys26Tyr	missense_variant	1/9	1	NM_207172.2	ENSP00000353788.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461808 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727210

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 29, 2024

The c.77G>A (p.C26Y) alteration is located in exon 1 (coding exon 1) of the NPSR1 gene. This alteration results from a G to A substitution at nucleotide position 77, causing the cysteine (C) at amino acid position 26 to be replaced by a tyrosine (Y). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.030
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.16	.;.;T;.;.;.;.
Eigen	Benign	0.038
Eigen_PC	Benign	0.044
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.91	D;D;D;D;D;D;D
M_CAP	Benign	0.014	T
MetaRNN	Uncertain	0.70	D;D;D;D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.97	L;L;L;L;L;L;L
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.95	N;N;N;N;N;N;N
REVEL	Benign	0.24
Sift	Uncertain	0.0020	D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;D;D
Polyphen		0.88, 1.0, 0.92	.;.;P;D;P;P;D
Vest4		0.72
MutPred		0.47		Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);Gain of phosphorylation at C26 (P = 0.0395);
MVP		0.62
MPC		0.16
ClinPred		0.92	D
GERP RS		4.4
Varity_R		0.35
gMVP		0.47

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: chr7-34698101;