9-35808216-A-G

Variant names:

• chr9-35808216-A-G
• rs143258253
• ENST00000340291.6:c.1463T>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BS1_Supporting

The NM_003995.4(NPR2):​c.2713-293A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000336 in 1,613,906 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00016 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00035 (0 hom.)
• Consequence: NPR2 NM_003995.4 intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.33
• Publications: 1 publications found

Genes affected

SPAG8 (HGNC:14105): (sperm associated antigen 8) The correlation of anti-sperm antibodies with cases of unexplained infertility implicates a role for these antibodies in blocking fertilization. Improved diagnosis and treatment of immunologic infertility, as well as identification of proteins for targeted contraception, are dependent on the identification and characterization of relevant sperm antigens. The protein encoded by this gene is recognized by sperm agglutinating antibodies from an infertile woman. This protein is localized in germ cells of the testis at all stages of spermatogenesis and is localized to the acrosomal region of mature spermatozoa. This protein interacts with ACT (activator of CREM in testis) and may play a role in CREM (cAMP response element modulator)-ACT-mediated gene transcription during spermatogenesis. This protein may also play a role in spermatogenesis by regulating microtubule formation and cell division. Alternatively spliced variants that encode different protein isoforms have been described but the full-length sequences of only two have been determined. [provided by RefSeq, Jul 2012]

NPR2 (HGNC:7944): (natriuretic peptide receptor 2) This gene encodes natriuretic peptide receptor B, one of two integral membrane receptors for natriuretic peptides. Both NPR1 and NPR2 contain five functional domains: an extracellular ligand-binding domain, a single membrane-spanning region, and intracellularly a protein kinase homology domain, a helical hinge region involved in oligomerization, and a carboxyl-terminal guanylyl cyclase catalytic domain. The protein is the primary receptor for C-type natriuretic peptide (CNP), which upon ligand binding exhibits greatly increased guanylyl cyclase activity. Mutations in this gene are the cause of acromesomelic dysplasia Maroteaux type. [provided by RefSeq, Jul 2008]

NPR2 Gene-Disease associations (from GenCC):

• acromesomelic dysplasia 1, Maroteaux type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• short stature with nonspecific skeletal abnormalities 1

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• tall stature-scoliosis-macrodactyly of the great toes syndrome

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.02664724).
• BS1: Variant frequency is greater than expected in population sas. GnomAdExome4 allele frequency = 0.000354 (518/1461884) while in subpopulation SAS AF = 0.000556 (48/86258). AF 95% confidence interval is 0.000431. There are 0 homozygotes in GnomAdExome4. There are 272 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPR2	NM_003995.4	c.2713-293A>G		intron_variant	Intron 18 of 21	ENST00000342694.7	NP_003986.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPR2	ENST00000342694.7	c.2713-293A>G		intron_variant	Intron 18 of 21	1	NM_003995.4	ENSP00000341083.2

Frequencies

GnomAD3 genomes AF: 0.000158 AC: 24 AN: 151904 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000524

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000235

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000231 AC: 58 AN: 251484 AF XY: 0.000294

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000299

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000354 AC: 518 AN: 1461884 Hom.: 0 Cov.: 31 AF XY: 0.000374 AC XY: 272 AN XY: 727244

African (AFR) AF: 0.000149 AC: 5 AN: 33478

American (AMR) AF: 0.000179 AC: 8 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.000556 AC: 48 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.000392 AC: 436 AN: 1112006

Other (OTH) AF: 0.000348 AC: 21 AN: 60396

GnomAD4 genome AF: 0.000158 AC: 24 AN: 152022 Hom.: 0 Cov.: 32 AF XY: 0.000215 AC XY: 16 AN XY: 74308

African (AFR) AF: 0.00 AC: 0 AN: 41448

American (AMR) AF: 0.000524 AC: 8 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5162

South Asian (SAS) AF: 0.00 AC: 0 AN: 4808

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10560

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000235 AC: 16 AN: 67984

Other (OTH) AF: 0.00 AC: 0 AN: 2108

Alfa AF: 0.000181 Hom.: 0

Bravo AF: 0.000215

TwinsUK AF: 0.000809 AC: 3

ALSPAC AF: 0.00 AC: 0

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000349 AC: 3

ExAC AF: 0.000239 AC: 29

EpiCase AF: 0.000545

EpiControl AF: 0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 28, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1463T>C (p.M488T) alteration is located in exon 8 (coding exon 8) of the SPAG8 gene. This alteration results from a T to C substitution at nucleotide position 1463, causing the methionine (M) at amino acid position 488 to be replaced by a threonine (T). 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
BayesDel_addAF	Benign	-0.54	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	0.85
DANN	Benign	0.85
Eigen	Benign	-0.87
Eigen_PC	Benign	-0.95
FATHMM_MKL	Benign	0.0097	N
LIST_S2	Benign	0.18	T
M_CAP	Benign	0.0092	T
MetaRNN	Benign	0.027	T
MetaSVM	Benign	-1.0	T
PhyloP100		-1.3
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.15	N
REVEL	Benign	0.025
Sift	Pathogenic	0.0	D
Polyphen		0.0030	B
Vest4		0.30
MVP		0.16
MPC		0.25
ClinPred		0.038	T
GERP RS		0.78
gMVP		0.23
Mutation Taster		=99/1	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: rs143258253; hg19: chr9-35808213; COSMIC: COSV52414310; COSMIC: COSV52414310;