chr4-122934228-G-A

Position:

• chr4-122934228-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP6

The NM_145207.3(AFG2A):​c.637G>A​(p.Asp213Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000651 in 1,614,064 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00038 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000032 (1 hom.)
• Consequence: AFG2A NM_145207.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 0.483

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]

SPATA5 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.029960632).
• BP6: Variant 4-122934228-G-A is Benign according to our data. Variant chr4-122934228-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 574573.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AFG2A	NM_145207.3	c.637G>A	p.Asp213Asn	missense_variant	5/16	ENST00000274008.5	NP_660208.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPATA5	ENST00000274008.5	c.637G>A	p.Asp213Asn	missense_variant	5/16	1	NM_145207.3	ENSP00000274008.3

Frequencies

GnomAD3 genomes AF: 0.000381 AC: 58 AN: 152180 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00130

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000398 AC: 10 AN: 251444 Hom.: 0 AF XY: 0.0000368 AC XY: 5 AN XY: 135898

Gnomad AFR exome AF: 0.000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000322 AC: 47 AN: 1461884 Hom.: 1 Cov.: 31 AF XY: 0.0000275 AC XY: 20 AN XY: 727244

Gnomad4 AFR exome AF: 0.00125

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: 0.00000180

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.000381 AC: 58 AN: 152180 Hom.: 0 Cov.: 33 AF XY: 0.000256 AC XY: 19 AN XY: 74346

Gnomad4 AFR AF: 0.00130

Gnomad4 AMR AF: 0.000196

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000750 Hom.: 0

Bravo AF: 0.000412

ESP6500AA AF: 0.00113 AC: 5

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.0000330 AC: 4

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Microcephaly-intellectual disability-sensorineural hearing loss-epilepsy-abnormal muscle tone syndrome Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 26, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	New York Genome Center	Jun 19, 2020	- -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 10, 2023

The c.637G>A (p.D213N) alteration is located in exon 5 (coding exon 5) of the SPATA5 gene. This alteration results from a G to A substitution at nucleotide position 637, causing the aspartic acid (D) at amino acid position 213 to be replaced by an asparagine (N). 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	0.070
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	2.3
DANN	Benign	0.93
DEOGEN2	Benign	0.0082	T
Eigen	Benign	-0.98
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.030	T
MetaSVM	Uncertain	-0.23	T
PrimateAI	Benign	0.25	T
PROVEAN	Benign	0.090	N
REVEL	Benign	0.13
Sift	Benign	0.25	T
Sift4G	Benign	0.53	T
Polyphen		0.0	B
Vest4		0.057
MVP		0.85
MPC		0.14
ClinPred		0.018	T
GERP RS		-0.20
Varity_R		0.044
gMVP		0.29

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: rs139066705; hg19: chr4-123855383;