16-56894607-C-G

Variant names:

• chr16-56894607-C-G
• NM_001126108.2:c.2598C>G
• SLC12A3 p.Gly866Gly

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001126108.2(SLC12A3):​c.2598C>G​(p.Gly866Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. G866G) has been classified as Benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: SLC12A3 NM_001126108.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.55
• Publications: 0 publications found

Genes affected

SLC12A3 (HGNC:10912): (solute carrier family 12 member 3) This gene encodes a renal thiazide-sensitive sodium-chloride cotransporter that is important for electrolyte homeostasis. This cotransporter mediates sodium and chloride reabsorption in the distal convoluted tubule. Mutations in this gene cause Gitelman syndrome, a disease similar to Bartter's syndrome, that is characterized by hypokalemic alkalosis combined with hypomagnesemia, low urinary calcium, and increased renin activity associated with normal blood pressure. This cotransporter is the target for thiazide diuretics that are used for treating high blood pressure. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

SLC12A3 Gene-Disease associations (from GenCC):

• Gitelman syndrome

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001126108.2. 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
	SLC12A3	NM_001126108.2	MANE Select	c.2598C>G	p.Gly866Gly	synonymous	Exon 22 of 26	NP_001119580.2	P55017-1
	SLC12A3	NM_000339.3		c.2625C>G	p.Gly875Gly	synonymous	Exon 22 of 26	NP_000330.3	P55017-2
	SLC12A3	NM_001126107.2		c.2622C>G	p.Gly874Gly	synonymous	Exon 22 of 26	NP_001119579.2	P55017-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC12A3	ENST00000563236.6	TSL:1 MANE Select	c.2598C>G	p.Gly866Gly	synonymous	Exon 22 of 26	ENSP00000456149.2	P55017-1
	SLC12A3	ENST00000438926.6	TSL:1	c.2625C>G	p.Gly875Gly	synonymous	Exon 22 of 26	ENSP00000402152.2	P55017-2
	SLC12A3	ENST00000566786.5	TSL:1	c.2622C>G	p.Gly874Gly	synonymous	Exon 22 of 26	ENSP00000457552.1	P55017-3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
CADD	Benign	0.85
DANN	Benign	0.64
PhyloP100		-1.6

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.29		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.29		Position offset: 35

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr16-56928519;