rs121964880

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_001692.4(ATP6V1B1):c.242T>C(p.Leu81Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000616 in 1,461,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

ATP6V1B1
NM_001692.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10

Conservation

PhyloP100: 5.95

Publications

10 publications found

Variant links:

Genes affected

ATP6V1B1 (HGNC:853): (ATPase H+ transporting V1 subunit B1) 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 B subunit isoforms and is found in the kidney. Mutations in this gene cause distal renal tubular acidosis associated with sensorineural deafness. [provided by RefSeq, Jul 2008]

ATP6V1B1 links:

ENSG00000258881 (HGNC:):

ENSG00000258881 links:

VAX2 (HGNC:12661): (ventral anterior homeobox 2) This gene encodes a homeobox protein and is almost exclusively expressed in the ventral portion of the retina during development. In mouse studies, this gene was found to be required for the correct formation of the optic fissure and other aspects of retinal development. [provided by RefSeq, Sep 2008]

VAX2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.987

PP5

Variant 2-70958113-T-C is Pathogenic according to our data. Variant chr2-70958113-T-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 12228.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP6V1B1	NM_001692.4 link	c.242T>C	p.Leu81Pro	missense_variant	Exon 3 of 14	ENST00000234396.10	NP_001683.2
ATP6V1B1	XM_011532907.3 link	c.362T>C	p.Leu121Pro	missense_variant	Exon 2 of 13		XP_011531209.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATP6V1B1	ENST00000234396.10 link	c.242T>C	p.Leu81Pro	missense_variant	Exon 3 of 14	1	NM_001692.4	ENSP00000234396.4
ENSG00000258881	ENST00000606025.5 link	c.476-15680A>G		intron_variant	Intron 5 of 5	5		ENSP00000475641.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250636

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461842

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727210

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86244

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53386

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000719

AC:

AN:

1112010

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

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.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Renal tubular acidosis with progressive nerve deafness

Pathogenic:6

Feb 04, 2020

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

Oct 08, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 01, 2013

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Apr 01, 2022

Revvity Omics, Revvity

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jun 19, 2025

Myriad Genetics, Inc.

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

NM_001692.3(ATP6V1B1):c.242T>C(L81P) is a missense variant classified as likely pathogenic in the context of distal renal tubular acidosis with deafness, ATP6V1B1-related. L81P has been observed in cases with relevant disease (PMID: 9916796, 12579397, 20805693, 19639346, 22509993). Relevant functional assessments of this variant are available in the literature (PMID: 18368028, 16769747). L81P has been observed in referenced population frequency databases. In summary, NM_001692.3(ATP6V1B1):c.242T>C(L81P) is a missense variant that has been observed more frequently in cases with the relevant disease than in healthy populations. Please note: this variant was assessed in the context of healthy population screening.

Nov 07, 2021

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: ATP6V1B1 c.242T>C (p.Leu81Pro) results in a non-conservative amino acid change located in the ATPase, F1/V1/A1 complex, alpha/beta subunit, N-terminal domain (IPR004100) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 250636 control chromosomes. c.242T>C has been reported in the literature as homozygous and compound heterozygous genotypes in multiple individuals affected with phenotypes of Renal Tubular Acidosis With Progressive Nerve Deafness (example, Jobst-Schwan_2020, Stover_2011, Palazzo_2017). These data indicate that the variant is very likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function. The most pronounced variant effect results in lack of B1E subunit interaction, failed V-ATPase assembly, and consequent loss of function as disease-causing mechanisms (Fuster_2008). Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as pathogenic/likely pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic.

not provided

Pathogenic:2

Oct 04, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 81 of the ATP6V1B1 protein (p.Leu81Pro). This variant is present in population databases (rs121964880, gnomAD 0.003%). This missense change has been observed in individuals with renal tubular acidosis (PMID: 9916796, 12414817, 28233610). ClinVar contains an entry for this variant (Variation ID: 12228). 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) performed at Invitae indicates that this missense variant is expected to disrupt ATP6V1B1 protein function. Experimental studies have shown that this missense change affects ATP6V1B1 function (PMID: 16769747, 18368028). For these reasons, this variant has been classified as Pathogenic.

Aug 05, 2024

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Published functional studies demonstrate this variant impairs H+ ATPase mediated proton secretion and trafficking (PMID: 16769747, 18368028); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 19639346, 16769747, 18368028, 28803436, 21614596, 28893421, 29310826, 17216496, 31959358, 12579397, 18386070, 35052694, 9916796, 12414817, 28005240, 28233610, 22509993)

Nephrocalcinosis;C0392525:Nephrolithiasis

Pathogenic:1

Sep 08, 2017

Yale Center for Mendelian Genomics, Yale University

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Distal renal tubular acidosis

Pathogenic:1

Oct 22, 2019

Yale Center for Mendelian Genomics, Yale University

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.42

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.80

D;.;.

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.80

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.98

D;D;D

M_CAP

Pathogenic

0.41

MetaRNN

Pathogenic

0.99

D;D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.1

H;.;.

PhyloP100

5.9

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-5.7

D;.;D

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;.;D

Sift4G

Pathogenic

0.0

D;.;D

Vest4

0.99

ClinPred

1.0

GERP RS

4.8

Varity_R

0.99

gMVP

0.96

Mutation Taster

=12/88

disease causing (ClinVar)

(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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over