Genetic Variant SSR4:p.Ala3_Ala5del (chrX-153794683-AGGCGATGGC-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PM4

The NM_006280.3(SSR4):c.6_14delGGCGATGGC(p.Ala3_Ala5del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.00000413 in 1,211,270 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000088 ( 0 hom., 0 hem., cov: 26)

Exomes 𝑓: 0.0000036 ( 0 hom. 0 hem. )

Consequence

SSR4
NM_006280.3 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.77

Variant links:

Genes affected

SSR4 (HGNC:11326): (signal sequence receptor subunit 4) This gene encodes the delta subunit of the translocon-associated protein complex which is involved in translocating proteins across the endoplasmic reticulum membrane. The encoded protein is located in the Xq28 region and is arranged in a compact head-to-head manner with the isocitrate dehydrogenase 3 (NAD+) gamma gene and both genes are driven by a CpG-embedded bidirectional promoter. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Mar 2011]

SSR4 links:

IDH3G (HGNC:5386): (isocitrate dehydrogenase (NAD(+)) 3 non-catalytic subunit gamma) Isocitrate dehydrogenases catalyze the oxidative decarboxylation of isocitrate to 2-oxoglutarate. These enzymes belong to two distinct subclasses, one of which utilizes NAD(+) as the electron acceptor and the other NADP(+). Five isocitrate dehydrogenases have been reported: three NAD(+)-dependent isocitrate dehydrogenases, which localize to the mitochondrial matrix, and two NADP(+)-dependent isocitrate dehydrogenases, one of which is mitochondrial and the other predominantly cytosolic. NAD(+)-dependent isocitrate dehydrogenases catalyze the allosterically regulated rate-limiting step of the tricarboxylic acid cycle. Each isozyme is a heterotetramer that is composed of two alpha subunits, one beta subunit, and one gamma subunit. The protein encoded by this gene is the gamma subunit of one isozyme of NAD(+)-dependent isocitrate dehydrogenase. This gene is a candidate gene for periventricular heterotopia. Several alternatively spliced transcript variants of this gene have been described, but only some of their full length natures have been determined. [provided by RefSeq, Jul 2008]

IDH3G links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Nonframeshift variant in NON repetitive region in NM_006280.3.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SSR4	NM_006280.3 link	c.6_14delGGCGATGGC	p.Ala3_Ala5del	disruptive_inframe_deletion	Exon 1 of 6	ENST00000370086.8	NP_006271.1	P51571

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SSR4	ENST00000370086.8 link	c.6_14delGGCGATGGC	p.Ala3_Ala5del	disruptive_inframe_deletion	Exon 1 of 6	1	NM_006280.3	ENSP00000359103.3		P51571

Frequencies

GnomAD3 genomes

AF:

0.00000883

AC:

AN:

113274

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35434

show subpopulations

Gnomad AFR

AF:

0.0000320

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000549

AC:

AN:

182024

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67208

show subpopulations

Gnomad AFR exome

AF:

0.0000767

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:

0.00000364

AC:

AN:

1097945

Hom.:

AF XY:

0.00

AC XY:

AN XY:

363401

show subpopulations

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:

0.00000475

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000882

AC:

AN:

113325

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35495

show subpopulations

Gnomad4 AFR

AF:

0.0000319

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over