chr15-34255385-G-GC

Variant names:

• chr15-34255385-G-GC
• rs1555380716
• NM_001365088.1:c.752dupG

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001365088.1(SLC12A6):​c.752dupG​(p.Ser252LeufsTer38) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. G251G) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SLC12A6 NM_001365088.1 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 7.91
• Publications: 0 publications found

Genes affected

SLC12A6 (HGNC:10914): (solute carrier family 12 member 6) This gene is a member of the K-Cl cotransporter (KCC) family. K-Cl cotransporters are integral membrane proteins that lower intracellular chloride concentrations below the electrochemical equilibrium potential. The proteins encoded by this gene are activated by cell swelling induced by hypotonic conditions. Alternate splicing results in multiple transcript variants encoding different isoforms. Mutations in this gene are associated with agenesis of the corpus callosum with peripheral neuropathy. [provided by RefSeq, Jul 2008]

SLC12A6 Gene-Disease associations (from GenCC):

• agenesis of the corpus callosum with peripheral neuropathy

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P, Ambry Genetics, Orphanet
• Charcot-Marie-Tooth disease, axonal, IIa 2II

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia

ENSG00000259468 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-34255385-G-GC is Pathogenic according to our data. Variant chr15-34255385-G-GC is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 523557.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001365088.1. 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
	SLC12A6	NM_001365088.1	MANE Select	c.752dupG	p.Ser252LeufsTer38	frameshift	Exon 8 of 26	NP_001352017.1	Q9UHW9-1
	SLC12A6	NM_133647.2		c.752dupG	p.Ser252LeufsTer38	frameshift	Exon 7 of 25	NP_598408.1	Q9UHW9-1
	SLC12A6	NM_001042496.2		c.725dupG	p.Ser243LeufsTer38	frameshift	Exon 8 of 26	NP_001035961.1	Q9UHW9-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC12A6	ENST00000354181.8	TSL:1 MANE Select	c.752dupG	p.Ser252LeufsTer38	frameshift	Exon 8 of 26	ENSP00000346112.3	Q9UHW9-1
	SLC12A6	ENST00000560611.5	TSL:1	c.752dupG	p.Ser252LeufsTer38	frameshift	Exon 7 of 25	ENSP00000454168.1	Q9UHW9-1
	SLC12A6	ENST00000558589.5	TSL:1	c.725dupG	p.Ser243LeufsTer38	frameshift	Exon 8 of 26	ENSP00000452776.1	Q9UHW9-4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	not provided (2)
1	-	-	Hypertelorism;C0175754:Corpus callosum, agenesis of;C0239234:Low-set ears;C0424503:Abnormal facial shape;C1850049:Clinodactyly of the 5th finger (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.9

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

Other links and lift over

dbSNP: rs1555380716; hg19: chr15-34547586;