8-85442184-C-A

Variant names:

• chr8-85442184-C-A
• NM_005181.4:c.344C>A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_005181.4(CA3):​c.344C>A​(p.Ala115Glu) variant causes a missense change. The variant allele was found at a frequency of 0.000000718 in 1,392,290 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: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: CA3 NM_005181.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.59

Genes affected

CA3 (HGNC:1374): (carbonic anhydrase 3) Carbonic anhydrase III (CAIII) is a member of a multigene family (at least six separate genes are known) that encodes carbonic anhydrase isozymes. These carbonic anhydrases are a class of metalloenzymes that catalyze the reversible hydration of carbon dioxide and are differentially expressed in a number of cell types. The expression of the CA3 gene is strictly tissue specific and present at high levels in skeletal muscle and much lower levels in cardiac and smooth muscle. A proportion of carriers of Duchenne muscle dystrophy have a higher CA3 level than normal. The gene spans 10.3 kb and contains seven exons and six introns. [provided by RefSeq, Oct 2008]

CA3-AS1 (HGNC:51657): (CA3 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.908

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CA3	NM_005181.4	c.344C>A	p.Ala115Glu	missense_variant	Exon 3 of 7	ENST00000285381.3	NP_005172.1
CA3-AS1	NR_121630.1	n.454G>T		non_coding_transcript_exon_variant	Exon 3 of 3
CA3-AS1	NR_121631.1	n.226G>T		non_coding_transcript_exon_variant	Exon 3 of 3
CA3-AS1	NR_121632.1	n.243G>T		non_coding_transcript_exon_variant	Exon 3 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CA3	ENST00000285381.3	c.344C>A	p.Ala115Glu	missense_variant	Exon 3 of 7	1	NM_005181.4	ENSP00000285381.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.18e-7 AC: 1 AN: 1392290 Hom.: 0 Cov.: 23 AF XY: 0.00000144 AC XY: 1 AN XY: 696746

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.54e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 01, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.344C>A (p.A115E) alteration is located in exon 3 (coding exon 3) of the CA3 gene. This alteration results from a C to A substitution at nucleotide position 344, causing the alanine (A) at amino acid position 115 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.81
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.21	T
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.027	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Benign	-0.68	T
MutationAssessor	Uncertain	2.7	M
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-2.0	N
REVEL	Uncertain	0.30
Sift	Benign	0.060	T
Sift4G	Benign	0.11	T
Polyphen		1.0	D
Vest4		0.79
MutPred		0.76		Gain of disorder (P = 0.0332);
MVP		0.67
MPC		0.72
ClinPred		0.97	D
GERP RS		6.0
Varity_R		0.81
gMVP		0.92

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-86354413;