rs1553709380

Variant names:

• chr3-113778833-C-A
• rs1553709380
• NM_001690.4:c.80C>A

Your query was ambiguous. Multiple possible variants found:

• chr3-113778833-C-A
• chr3-113778833-C-G

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM2 PM5 PP2 PP3_Strong

The NM_001690.4(ATP6V1A):​c.80C>A​(p.Pro27His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000142 in 1,409,632 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. 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. P27R) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ATP6V1A NM_001690.4 missense, splice_region
• Scores: Splicing: ADA: 0.9279
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.31
• Publications: 0 publications found

Genes affected

ATP6V1A (HGNC:851): (ATPase H+ transporting V1 subunit A) This gene encodes a component of vacuolar ATPase (V-ATPase), a multisubunit enzyme that mediates acidification of eukaryotic intracellular organelles. V-ATPase dependent organelle acidification is necessary for such intracellular processes as protein sorting, zymogen activation, receptor-mediated endocytosis, and synaptic vesicle proton gradient generation. V-ATPase is composed of a cytosolic V1 domain and a transmembrane V0 domain. The V1 domain consists of three A and three B subunits, two G subunits plus the C, D, E, F, and H subunits. The V1 domain contains the ATP catalytic site. The V0 domain consists of five different subunits: a, c, c', c", and d. Additional isoforms of many of the V1 and V0 subunit proteins are encoded by multiple genes or alternatively spliced transcript variants. This encoded protein is one of two V1 domain A subunit isoforms and is found in all tissues. Transcript variants derived from alternative polyadenylation exist. [provided by RefSeq, Jul 2008]

ATP6V1A Gene-Disease associations (from GenCC):

• developmental and epileptic encephalopathy 93

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autosomal recessive cutis laxa type 2D

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P, Genomics England PanelApp, Ambry Genetics
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive cutis laxa type 2, classic type

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-113778833-C-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 545526.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in the ATP6V1A gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 17 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: 3.3731 (above the threshold of 3.09). Trascript score misZ: 4.7152 (above the threshold of 3.09). GenCC associations: The gene is linked to autosomal recessive cutis laxa type 2D, developmental and epileptic encephalopathy 93, autosomal recessive cutis laxa type 2, classic type, undetermined early-onset epileptic encephalopathy.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.961

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001690.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP6V1A	NM_001690.4	MANE Select	c.80C>A	p.Pro27His	missense splice_region	Exon 2 of 15	NP_001681.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP6V1A	ENST00000273398.8	TSL:1 MANE Select	c.80C>A	p.Pro27His	missense splice_region	Exon 2 of 15	ENSP00000273398.3
	ATP6V1A	ENST00000703904.2		c.80C>A	p.Pro27His	missense splice_region	Exon 3 of 16	ENSP00000515542.1
	ATP6V1A	ENST00000496747.6	TSL:5	c.-20C>A		5_prime_UTR_premature_start_codon_gain	Exon 2 of 15	ENSP00000417545.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000142 AC: 2 AN: 1409632 Hom.: 0 Cov.: 27 AF XY: 0.00 AC XY: 0 AN XY: 701380

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

African (AFR) AF: 0.00 AC: 0 AN: 30970

American (AMR) AF: 0.0000269 AC: 1 AN: 37124

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24540

East Asian (EAS) AF: 0.00 AC: 0 AN: 37492

South Asian (SAS) AF: 0.00 AC: 0 AN: 77574

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5364

European-Non Finnish (NFE) AF: 9.21e-7 AC: 1 AN: 1086134

Other (OTH) AF: 0.00 AC: 0 AN: 58014

⚠️ 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.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.39	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	5.2	H
PhyloP100		7.3
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-7.8	D
REVEL	Pathogenic	0.88
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.81
MutPred		0.83		Gain of catalytic residue at P27 (P = 0.0057)
MVP		0.87
MPC		1.9
ClinPred		1.0	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.95
gMVP		0.88
Mutation Taster		=12/88	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.93
dbscSNV1_RF	Pathogenic	0.79
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

Other links and lift over

dbSNP: rs1553709380; hg19: chr3-113497680; COSMIC: COSV105851963;