NM_001692.4:c.144C>G

Variant names:

• chr2-70943683-C-G
• rs144845223
• NM_001692.4:c.144C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001692.4(ATP6V1B1):​c.144C>G​(p.Asn48Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,640 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. N48N) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ATP6V1B1 NM_001692.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.505
• Publications: 0 publications found

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]

ENSG00000258881 (HGNC:):

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]

ATP6V1B1-AS1 (HGNC:51118): (ATP6V1B1 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.4176402).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001692.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP6V1B1	NM_001692.4	MANE Select	c.144C>G	p.Asn48Lys	missense	Exon 2 of 14	NP_001683.2
	ATP6V1B1-AS1	NR_110273.1		n.524-1250G>C		intron	N/A
	ATP6V1B1-AS1	NR_110274.1		n.386-1250G>C		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP6V1B1	ENST00000234396.10	TSL:1 MANE Select	c.144C>G	p.Asn48Lys	missense	Exon 2 of 14	ENSP00000234396.4	P15313
	ENSG00000258881	ENST00000606025.5	TSL:5	c.476-1250G>C		intron	N/A	ENSP00000475641.1	U3KQ87
	ATP6V1B1	ENST00000872157.1		c.144C>G	p.Asn48Lys	missense	Exon 2 of 14	ENSP00000542216.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461640 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727126

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53232

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111982

Other (OTH) AF: 0.00 AC: 0 AN: 60382

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Uncertain	0.017	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	8.9
DANN	Uncertain	0.99
DEOGEN2	Benign	0.35	T
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.91
FATHMM_MKL	Benign	0.20	N
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.070	D
MetaRNN	Benign	0.42	T
MetaSVM	Benign	-0.75	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		-0.51
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-2.7	D
REVEL	Uncertain	0.36
Sift	Uncertain	0.021	D
Sift4G	Benign	0.65	T
Polyphen		0.0060	B
Vest4		0.70
MutPred		0.36		Gain of ubiquitination at N48 (P = 0.0258)
MVP		0.64
MPC		1.0
ClinPred		0.89	D
GERP RS		-5.4
Varity_R		0.36
gMVP		0.48
Mutation Taster		=55/45	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs144845223; hg19: chr2-71170813;