16-87888260-G-A

Position:

chr16-87888260-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001739.2(CA5A):c.787C>T(p.Arg263Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000397 in 1,613,134 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000041 ( 0 hom. )

Consequence

CA5A
NM_001739.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.35

Variant links:

Genes affected

CA5A (HGNC:1377): (carbonic anhydrase 5A) 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. CA VA is localized in the mitochondria and expressed primarily in the liver. It may play an important role in ureagenesis and gluconeogenesis. CA5A gene maps to chromosome 16q24.3 and an unprocessed pseudogene has been assigned to 16p12-p11.2. [provided by RefSeq, Jul 2008]

CA5A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.977

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CA5A	NM_001739.2 linkuse as main transcript	c.787C>T	p.Arg263Cys	missense_variant	7/7	ENST00000649794.3	NP_001730.1
CA5A	NM_001367225.1 linkuse as main transcript	c.774+3539C>T		intron_variant			NP_001354154.1
CA5A	NR_159798.1 linkuse as main transcript	n.974C>T		non_coding_transcript_exon_variant	8/8
CA5A	NR_159799.1 linkuse as main transcript	n.747C>T		non_coding_transcript_exon_variant	6/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CA5A	ENST00000649794.3 linkuse as main transcript	c.787C>T	p.Arg263Cys	missense_variant	7/7		NM_001739.2	ENSP00000498065	P1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000280

AC:

AN:

250048

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135170

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000581

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:

0.0000354

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000411

AC:

AN:

1461012

Hom.:

Cov.:

AF XY:

0.0000399

AC XY:

AN XY:

726728

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000672

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000477

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000659

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hyperammonemic encephalopathy due to carbonic anhydrase VA deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 09, 2022

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 263 of the CA5A protein (p.Arg263Cys). This variant is present in population databases (rs764205965, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with CA5A-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.20

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.89

.;D

M_CAP

Pathogenic

0.44

MetaRNN

Pathogenic

0.98

D;D

MetaSVM

Uncertain

0.56

MutationAssessor

Pathogenic

3.7

H;H

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.56

PROVEAN

Pathogenic

-7.6

D;.

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;.

Polyphen

1.0

D;D

Vest4

0.52

MVP

0.95

MPC

0.33

ClinPred

1.0

GERP RS

4.8

Varity_R

0.79

gMVP

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.18

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