8-100220285-G-A

Position:

chr8-100220285-G-A

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_003114.5(SPAG1):c.1542G>A(p.Leu514=) variant causes a synonymous change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00359 in 1,607,124 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0031 ( 2 hom., cov: 33)

Exomes 𝑓: 0.0036 ( 14 hom. )

Consequence

SPAG1
NM_003114.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 7.76

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:

LOC105375669 (HGNC:):

LOC105375669 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.32).

BP6

Variant 8-100220285-G-A is Benign according to our data. Variant chr8-100220285-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 416525.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00309 (471/152290) while in subpopulation NFE AF= 0.00447 (304/68022). AF 95% confidence interval is 0.00406. There are 2 homozygotes in gnomad4. There are 233 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPAG1	NM_003114.5 linkuse as main transcript	c.1542G>A	p.Leu514=	synonymous_variant	13/19	ENST00000388798.7
LOC105375669	XR_928450.3 linkuse as main transcript			upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPAG1	ENST00000388798.7 linkuse as main transcript	c.1542G>A	p.Leu514=	synonymous_variant	13/19	1	NM_003114.5	P1	Q07617-1
SPAG1	ENST00000251809.4 linkuse as main transcript	c.1542G>A	p.Leu514=	synonymous_variant	13/19	5		P1	Q07617-1
SPAG1	ENST00000523302.1 linkuse as main transcript	n.343-4888G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00310

AC:

471

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000724

Gnomad AMI

AF:

0.0340

Gnomad AMR

AF:

0.000851

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00763

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00447

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.00284

AC:

692

AN:

243494

Hom.:

AF XY:

0.00273

AC XY:

359

AN XY:

131488

show subpopulations

Gnomad AFR exome

AF:

0.000558

Gnomad AMR exome

AF:

0.000527

Gnomad ASJ exome

AF:

0.00135

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00105

Gnomad FIN exome

AF:

0.00725

Gnomad NFE exome

AF:

0.00414

Gnomad OTH exome

AF:

0.00101

GnomAD4 exome

AF:

0.00365

AC:

5304

AN:

1454834

Hom.:

Cov.:

AF XY:

0.00355

AC XY:

2568

AN XY:

723540

show subpopulations

Gnomad4 AFR exome

AF:

0.000455

Gnomad4 AMR exome

AF:

0.000565

Gnomad4 ASJ exome

AF:

0.00116

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00129

Gnomad4 FIN exome

AF:

0.00725

Gnomad4 NFE exome

AF:

0.00407

Gnomad4 OTH exome

AF:

0.00367

GnomAD4 genome

AF:

0.00309

AC:

471

AN:

152290

Hom.:

Cov.:

AF XY:

0.00313

AC XY:

233

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.000722

Gnomad4 AMR

AF:

0.000850

Gnomad4 ASJ

AF:

0.00202

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000621

Gnomad4 FIN

AF:

0.00763

Gnomad4 NFE

AF:

0.00447

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.00361

Hom.:

Bravo

AF:

0.00260

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00507

EpiControl

AF:

0.00397

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Dec 01, 2023	SPAG1: BP4, BS2 -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Primary ciliary dyskinesia 28

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 29, 2024

- -

Primary ciliary dyskinesia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 30, 2016

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

BayesDel_noAF

Benign

-0.32

CADD

Benign

8.5

DANN

Benign

0.81

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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