NM_001215.4:c.228G>T

Variant names:

• chr1-8949411-G-T
• rs2274330
• NM_001215.4:c.228G>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001215.4(CA6):​c.228G>T​(p.Gly76Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,566 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.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CA6 NM_001215.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.905
• Publications: 11 publications found

Genes affected

CA6 (HGNC:1380): (carbonic anhydrase 6) The protein encoded by this gene is one of several isozymes of carbonic anhydrase. This protein is found only in salivary glands and saliva and protein may play a role in the reversible hydratation of carbon dioxide though its function in saliva is unknown. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001215.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CA6	NM_001215.4	MANE Select	c.228G>T	p.Gly76Gly	synonymous	Exon 2 of 8	NP_001206.2
	CA6	NM_001270500.2		c.228G>T	p.Gly76Gly	synonymous	Exon 2 of 8	NP_001257429.1
	CA6	NM_001270501.2		c.79+3446G>T		intron	N/A	NP_001257430.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CA6	ENST00000377443.7	TSL:1 MANE Select	c.228G>T	p.Gly76Gly	synonymous	Exon 2 of 8	ENSP00000366662.2
	CA6	ENST00000377436.6	TSL:1	c.228G>T	p.Gly76Gly	synonymous	Exon 2 of 8	ENSP00000366654.3
	CA6	ENST00000480186.7	TSL:2	c.228G>T	p.Gly76Gly	synonymous	Exon 2 of 3	ENSP00000435280.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000401 AC: 1 AN: 249508 AF XY: 0.00000741

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000548

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1460566 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 726636

African (AFR) AF: 0.00 AC: 0 AN: 33382

American (AMR) AF: 0.00 AC: 0 AN: 44606

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26084

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39636

South Asian (SAS) AF: 0.00 AC: 0 AN: 86138

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53396

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111220

Other (OTH) AF: 0.0000166 AC: 1 AN: 60342

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	14
DANN	Benign	0.33
PhyloP100		-0.91
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.97		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.97		Position offset: -2
DS_DL_spliceai		0.80		Position offset: 31

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs2274330; hg19: chr1-9009470;