chr8-100194231-A-AGAG

Variant names:

• chr8-100194231-A-AGAG
• NM_003114.5:c.1059_1060insGAG

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_003114.5(SPAG1):​c.1059_1060insGAG​(p.Lys353_Ser354insGlu) variant causes a conservative inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,464 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SPAG1 NM_003114.5 conservative_inframe_insertion
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.19

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a modified_residue Phosphoserine (size 0) in uniprot entity SPAG1_HUMAN
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPAG1	NM_003114.5	c.1059_1060insGAG	p.Lys353_Ser354insGlu	conservative_inframe_insertion	Exon 10 of 19	ENST00000388798.7	NP_003105.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPAG1	ENST00000388798.7	c.1059_1060insGAG	p.Lys353_Ser354insGlu	conservative_inframe_insertion	Exon 10 of 19	1	NM_003114.5	ENSP00000373450.3
SPAG1	ENST00000251809.4	c.1059_1060insGAG	p.Lys353_Ser354insGlu	conservative_inframe_insertion	Exon 10 of 19	5		ENSP00000251809.3
SPAG1	ENST00000520508.5	c.1059_1060insGAG	p.Lys353_Ser354insGlu	conservative_inframe_insertion	Exon 10 of 10	5		ENSP00000428070.1
SPAG1	ENST00000520643.5	c.1059_1060insGAG	p.Lys353_Ser354insGlu	conservative_inframe_insertion	Exon 10 of 10	2		ENSP00000427716.1

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1457464 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 725260

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.02e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

EpiCase AF: 0.00

EpiControl AF: 0.0000595

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Splicing

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: chr8-101206459;