rs374771569

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 1P and 3B. PP2BP4_ModerateBS1_Supporting

The NM_145207.3(AFG2A):c.436G>A(p.Val146Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000647 in 1,591,388 control chromosomes in the GnomAD database, including 1 homozygotes. 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: 𝑓 0.00030 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000040 ( 1 hom. )

Consequence

AFG2A
NM_145207.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.717

Publications

0 publications found

Variant links:

Genes affected

AFG2A (HGNC:18119): (AFG2 AAA ATPase homolog A) This gene encodes a member of the ATPase associated with diverse activities family, whose members are defined by a highly conserved ATPase domain. Members of this family participate in diverse cellular processes that include membrane fusion, DNA replication, microtubule severing, and protein degradation. The protein encoded by this gene has a putative mitochondrial targeting sequence and has been proposed to function in maintenance of mitochondrial function and integrity during mouse spermatogenesis. Allelic variants in this gene have been associated with epilepsy, hearing loss, and cognitive disability syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2016]

AFG2A Gene-Disease associations (from GenCC):

microcephaly-intellectual disability-sensorineural hearing loss-epilepsy-abnormal muscle tone syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, PanelApp Australia

AFG2A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 22 curated pathogenic missense variants (we use a threshold of 10). The gene has 7 curated benign missense variants. Gene score misZ: 0.46019 (below the threshold of 3.09). Trascript score misZ: 1.2041 (below the threshold of 3.09). GenCC associations: The gene is linked to microcephaly-intellectual disability-sensorineural hearing loss-epilepsy-abnormal muscle tone syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.078553975).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000296 (45/152254) while in subpopulation AFR AF = 0.000987 (41/41538). AF 95% confidence interval is 0.000747. There are 0 homozygotes in GnomAd4. There are 23 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AFG2A	NM_145207.3 link	c.436G>A	p.Val146Met	missense_variant	Exon 3 of 16	ENST00000274008.5	NP_660208.2	Q8NB90-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
AFG2A	ENST00000274008.5 link	c.436G>A	p.Val146Met	missense_variant	Exon 3 of 16	1	NM_145207.3	ENSP00000274008.3	Q8NB90-1
AFG2A	ENST00000422835.2 link	n.478G>A		non_coding_transcript_exon_variant	Exon 3 of 15	1
AFG2A	ENST00000675612.1 link	c.433G>A	p.Val145Met	missense_variant	Exon 3 of 17			ENSP00000502453.1	A0A6Q8PGU6
AFG2A	ENST00000674886.1 link	n.498G>A		non_coding_transcript_exon_variant	Exon 3 of 11

Frequencies

GnomAD3 genomes

AF:

0.000296

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000990

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000693

AC:

AN:

230850

AF XY:

0.0000797

show subpopulations

Gnomad AFR exome

AF:

0.000720

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000182

GnomAD4 exome

AF:

0.0000403

AC:

AN:

1439134

Hom.:

Cov.:

AF XY:

0.0000448

AC XY:

AN XY:

714968

show subpopulations

African (AFR)

AF:

0.00102

AC:

AN:

32244

American (AMR)

AF:

0.0000509

AC:

AN:

39322

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25456

East Asian (EAS)

AF:

0.00

AC:

AN:

38594

South Asian (SAS)

AF:

0.000183

AC:

AN:

82000

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53210

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5704

European-Non Finnish (NFE)

AF:

9.07e-7

AC:

AN:

1103120

Other (OTH)

AF:

0.000118

AC:

AN:

59484

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

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

AF:

0.000296

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.000987

AC:

AN:

41538

American (AMR)

AF:

0.000131

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000415

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000164

Hom.:

Bravo

AF:

0.000280

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jun 26, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.436G>A (p.V146M) alteration is located in exon 3 (coding exon 3) of the SPATA5 gene. This alteration results from a G to A substitution at nucleotide position 436, causing the valine (V) at amino acid position 146 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Dec 15, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Microcephaly-intellectual disability-sensorineural hearing loss-epilepsy-abnormal muscle tone syndrome

Uncertain:1

Nov 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 146 of the SPATA5 protein (p.Val146Met). This variant is present in population databases (rs374771569, gnomAD 0.08%). This variant has not been reported in the literature in individuals affected with SPATA5-related conditions. ClinVar contains an entry for this variant (Variation ID: 475731). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SPATA5 protein function. 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

-0.29

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.047

Eigen

Benign

-0.073

Eigen_PC

Benign

-0.077

FATHMM_MKL

Benign

0.58

LIST_S2

Uncertain

0.91

M_CAP

Benign

0.035

MetaRNN

Benign

0.079

MetaSVM

Uncertain

0.18

PhyloP100

0.72

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.45

REVEL

Benign

0.25

Sift

Uncertain

0.020

Sift4G

Uncertain

0.013

Polyphen

0.81

Vest4

0.22

MVP

0.93

MPC

0.39

ClinPred

0.067

GERP RS

0.38

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.053

gMVP

0.28

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over