Variant 8-85333605-AGT-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001128831.4(CA1):c.368_369del(p.His123LeufsTer11) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000412 in 1,457,148 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

CA1
NM_001128831.4 frameshift

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.48

Variant links:

Genes affected

CA1 (HGNC:1368): (carbonic anhydrase 1) Carbonic anhydrases (CAs) are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide. They participate in a variety of biological processes, including respiration, calcification, acid-base balance, bone resorption, and the formation of aqueous humor, cerebrospinal fluid, saliva and gastric acid. They show extensive diversity in tissue distribution and in their subcellular localization. This CA1 gene is closely linked to the CA2 and CA3 genes on chromosome 8. It encodes a cytosolic protein that is found at the highest level in erythrocytes. Allelic variants of this gene have been described in some populations. Alternative splicing and the use of alternative promoters results in multiple transcript variants. [provided by RefSeq, Nov 2016]

CA1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CA1	NM_001128831.4 linkuse as main transcript	c.368_369del	p.His123LeufsTer11	frameshift_variant	5/8	ENST00000523022.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CA1	ENST00000523022.6 linkuse as main transcript	c.368_369del	p.His123LeufsTer11	frameshift_variant	5/8	1	NM_001128831.4	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250342

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135316

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000412

AC:

AN:

1457148

Hom.:

AF XY:

0.00000552

AC XY:

AN XY:

725168

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:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Renal tubular acidosis;C0035579:Rickets;C0220981:Metabolic acidosis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Diagnostics Services (NGS), CSIR - Centre For Cellular And Molecular Biology

Nov 09, 2019

A role of this CA1 gene in renal tubular acidosis was suggested earlier, however no disorder has been associated with this gene till date (Shapira et al. J Clin Invest 1974). Another gene of this family (CA2) is known to cause autosomal recessive osteopetrosis with renal tubular acidosis (MIM#259730). The c.368_369del variant is present in publicly available databases like Exome Aggregation Consortium (ExAC), Genome Aggregation Database (gnomAD) and dbSNP only in heterozygous state (minor allele frequency < 0.00001). The variant is not present in our in-house exome database. The variant was not reported to OMIM, ClinVar and Human Genome Mutation Database (HGMD) in any other affected individuals. In-silico pathogenicity prediction programs like MutationTaster2, CADD etc. predicted this variant as likely deleterious. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over