Genetic Variant SPATA4:p.Arg175Ser (chr4-176192792-G-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_144644.4(SPATA4):c.523C>A(p.Arg175Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,768 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R175C) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SPATA4
NM_144644.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.321

Publications

0 publications found

Variant links:

Genes affected

SPATA4 (HGNC:17333): (spermatogenesis associated 4) Predicted to enable microtubule binding activity. Predicted to be involved in regulation of cytoskeleton organization. Predicted to be located in cytoplasm. Predicted to be active in axoneme. [provided by Alliance of Genome Resources, Apr 2022]

SPATA4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11040309).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144644.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPATA4	NM_144644.4	MANE Select	c.523C>A	p.Arg175Ser	missense	Exon 4 of 6	NP_653245.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SPATA4	ENST00000280191.7	TSL:1 MANE Select	c.523C>A	p.Arg175Ser	missense	Exon 4 of 6	ENSP00000280191.2	Q8NEY3
SPATA4	ENST00000515234.1	TSL:1	c.4C>A	p.Arg2Ser	missense	Exon 3 of 5	ENSP00000422290.1	G5E9Y6
SPATA4	ENST00000508699.1	TSL:3	n.*352C>A		downstream_gene	N/A	ENSP00000425950.1	H0YA30

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461768

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727184

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111944

Other (OTH)

AF:

0.00

AC:

AN:

60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.65

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.0069

Eigen

Benign

-0.95

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.020

LIST_S2

Benign

0.65

M_CAP

Benign

0.0064

MetaRNN

Benign

0.11

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

PhyloP100

0.32

PrimateAI

Benign

0.20

PROVEAN

Benign

-1.1

REVEL

Benign

0.17

Sift

Benign

0.21

Sift4G

Benign

0.098

Polyphen

0.044

Vest4

0.12

MutPred

0.66

Loss of MoRF binding (P = 0.072)

MVP

0.23

MPC

0.12

ClinPred

0.21

GERP RS

0.11

Varity_R

0.14

gMVP

0.29

Mutation Taster

=77/23

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over