8-100183424-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003114.5(SPAG1):c.476C>T(p.Ala159Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000461 in 1,497,902 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 0.00019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

SPAG1
NM_003114.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.56

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.09329215).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPAG1	NM_003114.5 link	c.476C>T	p.Ala159Val	missense_variant	Exon 5 of 19	ENST00000388798.7	NP_003105.2	Q07617-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SPAG1	ENST00000388798.7 link	c.476C>T	p.Ala159Val	missense_variant	Exon 5 of 19	1	NM_003114.5	ENSP00000373450.3	Q07617-1
SPAG1	ENST00000251809.4 link	c.476C>T	p.Ala159Val	missense_variant	Exon 5 of 19	5		ENSP00000251809.3	Q07617-1
SPAG1	ENST00000520508.5 link	c.476C>T	p.Ala159Val	missense_variant	Exon 5 of 10	5		ENSP00000428070.1	Q07617-2
SPAG1	ENST00000520643.5 link	c.476C>T	p.Ala159Val	missense_variant	Exon 5 of 10	2		ENSP00000427716.1	Q07617-2

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

151990

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000387

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000959

GnomAD3 exomes

AF:

0.0000461

AC:

AN:

238498

Hom.:

AF XY:

0.0000386

AC XY:

AN XY:

129436

show subpopulations

Gnomad AFR exome

AF:

0.000324

Gnomad AMR exome

AF:

0.0000650

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000707

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000182

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000297

AC:

AN:

1345794

Hom.:

Cov.:

AF XY:

0.0000222

AC XY:

AN XY:

674510

show subpopulations

Gnomad4 AFR exome

AF:

0.0000663

Gnomad4 AMR exome

AF:

0.0000737

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000519

Gnomad4 SAS exome

AF:

0.0000501

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000246

Gnomad4 OTH exome

AF:

0.0000535

GnomAD4 genome

AF:

0.000191

AC:

AN:

152108

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.000386

Gnomad4 AMR

AF:

0.000458

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000949

Alfa

AF:

0.000115

Hom.:

Bravo

AF:

0.000246

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000117

AC:

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia 28

Uncertain:2

Nov 18, 2021

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 159 of the SPAG1 protein (p.Ala159Val). This variant is present in population databases (rs370505284, gnomAD 0.04%). This missense change has been observed in individual(s) with clinical features of SPAG1-related conditions (Invitae). ClinVar contains an entry for this variant (Variation ID: 474663). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.49

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.048

.;T;.;T

Eigen

Uncertain

0.47

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Uncertain

0.76

LIST_S2

Uncertain

0.87

.;D;D;.

M_CAP

Benign

0.0058

MetaRNN

Benign

0.093

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.6

M;M;M;M

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.7

D;N;D;N

REVEL

Benign

0.072

Sift

Benign

0.12

T;T;T;T

Sift4G

Benign

0.19

T;T;T;T

Polyphen

1.0

.;D;.;D

Vest4

0.32

MVP

0.65

MPC

0.30

ClinPred

0.23

GERP RS

4.3

Varity_R

0.098

gMVP

0.19

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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