8-100194256-G-A

Position:

chr8-100194256-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_003114.5(SPAG1):c.1084G>A(p.Gly362Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000529 in 1,607,300 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

SPAG1
NM_003114.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 0.665

Variant links:

Genes affected

SPAG1 (HGNC:11212): (sperm associated antigen 1) 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 expressed by this gene is recognized by anti-sperm agglutinating antibodies from an infertile woman. Furthermore, immunization of female rats with the recombinant human protein reduced fertility. This protein localizes to the plasma membrane of germ cells in the testis and to the post-acrosomal plasma membrane of mature spermatozoa. Recombinant polypeptide binds GTP and exhibits GTPase activity. Thus, this protein may regulate GTP signal transduction pathways involved in spermatogenesis and fertilization. Two transcript variants of this gene encode the same protein. [provided by RefSeq, Jul 2008]

SPAG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.02872166).

BP6

Variant 8-100194256-G-A is Benign according to our data. Variant chr8-100194256-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 573113.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPAG1	NM_003114.5 linkuse as main transcript	c.1084G>A	p.Gly362Ser	missense_variant	10/19	ENST00000388798.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPAG1	ENST00000388798.7 linkuse as main transcript	c.1084G>A	p.Gly362Ser	missense_variant	10/19	1	NM_003114.5	P1	Q07617-1
SPAG1	ENST00000251809.4 linkuse as main transcript	c.1084G>A	p.Gly362Ser	missense_variant	10/19	5		P1	Q07617-1
SPAG1	ENST00000520508.5 linkuse as main transcript	c.1084G>A	p.Gly362Ser	missense_variant	10/10	5			Q07617-2
SPAG1	ENST00000520643.5 linkuse as main transcript	c.1084G>A	p.Gly362Ser	missense_variant	10/10	2			Q07617-2

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000482

AC:

AN:

248754

Hom.:

AF XY:

0.0000446

AC XY:

AN XY:

134588

show subpopulations

Gnomad AFR exome

AF:

0.0000624

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000893

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000529

AC:

AN:

1455188

Hom.:

Cov.:

AF XY:

0.0000483

AC XY:

AN XY:

724214

show subpopulations

Gnomad4 AFR exome

AF:

0.0000899

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000633

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152112

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000115

Hom.:

Bravo

AF:

0.0000529

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia 28

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 28, 2020

This sequence change replaces glycine with serine at codon 362 of the SPAG1 protein (p.Gly362Ser). The glycine residue is weakly conserved and there is a small physicochemical difference between glycine and serine. This variant is present in population databases (rs755866717, ExAC 0.01%). This variant has not been reported in the literature in individuals with SPAG1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The serine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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. -

Primary ciliary dyskinesia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 09, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.55

CADD

Benign

3.3

DANN

Benign

0.53

DEOGEN2

Benign

0.0087

.;T;.;T

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.019

LIST_S2

Benign

0.54

.;T;T;.

M_CAP

Benign

0.0087

MetaRNN

Benign

0.029

T;T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-1.8

N;N;N;N

MutationTaster

Benign

0.61

D;D;N;N

PrimateAI

Benign

0.45

PROVEAN

Benign

1.4

N;N;N;N

REVEL

Benign

0.016

Sift

Benign

0.71

T;T;T;T

Sift4G

Benign

0.59

T;T;T;T

Polyphen

0.0

.;B;.;B

Vest4

0.053

MVP

0.30

MPC

0.15

ClinPred

0.027

GERP RS

3.0

Varity_R

0.031

gMVP

0.11

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over