chr17-3448917-T-C

Variant names:

• chr17-3448917-T-C
• rs746418036
• NM_001170698.2:c.562A>G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001170698.2(SPATA22):​c.562A>G​(p.Met188Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,774 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: SPATA22 NM_001170698.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.278

Genes affected

SPATA22 (HGNC:30705): (spermatogenesis associated 22) Predicted to be involved in regulation of meiotic cell cycle. Predicted to act upstream of or within several processes, including fertilization; gamete generation; and meiosis I cell cycle process. Predicted to be located in chromosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.041021347).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPATA22	NM_001170698.2	c.562A>G	p.Met188Val	missense_variant	Exon 6 of 9	ENST00000572969.6	NP_001164169.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPATA22	ENST00000572969.6	c.562A>G	p.Met188Val	missense_variant	Exon 6 of 9	1	NM_001170698.2	ENSP00000460187.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000119 AC: 3 AN: 251354 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135836

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461774 Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3 AN XY: 727184

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000312 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 17, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.562A>G (p.M188V) alteration is located in exon 6 (coding exon 5) of the SPATA22 gene. This alteration results from a A to G substitution at nucleotide position 562, causing the methionine (M) at amino acid position 188 to be replaced by a valine (V). 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
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	0.65
DANN	Benign	0.51
DEOGEN2	Benign	0.0034	T;T;.;T;T;.;.;T;T;.
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.84
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.60	.;.;T;.;T;T;T;T;T;T
M_CAP	Benign	0.0028	T
MetaRNN	Benign	0.041	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	L;L;.;L;L;.;L;.;.;.
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-0.41	N;.;N;.;.;N;N;.;.;.
REVEL	Benign	0.030
Sift	Benign	0.38	T;.;T;.;.;T;T;.;.;.
Sift4G	Benign	0.48	T;T;T;T;T;T;T;.;.;.
Polyphen		0.0	B;B;B;B;B;B;.;.;.;.
Vest4		0.13
MutPred		0.15		Loss of MoRF binding (P = 0.105);Loss of MoRF binding (P = 0.105);.;Loss of MoRF binding (P = 0.105);Loss of MoRF binding (P = 0.105);.;Loss of MoRF binding (P = 0.105);.;.;.;
MVP		0.048
MPC		0.027
ClinPred		0.026	T
GERP RS		2.1
Varity_R		0.063
gMVP		0.14

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

Publications

LitVar

Other links and lift over

dbSNP: rs746418036; hg19: chr17-3352211;