rs1553689580

chr3-11025543-T-C

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Very_Strong

The NM_003042.4(SLC6A1):c.809T>C(p.Phe270Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC6A1 NM_003042.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 7.88

Genes affected

SLC6A1 (HGNC:11042): (solute carrier family 6 member 1) The protein encoded by this gene is a gamma-aminobutyric acid (GABA) transporter that localizes to the plasma membrane. The encoded protein removes GABA from the synaptic cleft, restoring it to presynaptic terminals. [provided by RefSeq, Jan 2017]

ACMG classification

Verdict is Pathogenic. Variant got 15 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 10 uncertain in NM_003042.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, SLC6A1
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.923
• PP5: Variant 3-11025543-T-C is Pathogenic according to our data. Variant chr3-11025543-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 520878.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC6A1	NM_003042.4	c.809T>C	p.Phe270Ser	missense_variant	8/16	ENST00000287766.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC6A1	ENST00000287766.10	c.809T>C	p.Phe270Ser	missense_variant	8/16	1	NM_003042.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 05, 2015

- -

Myoclonic-atonic epilepsy Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Invitae

Oct 03, 2023

This sequence change replaces phenylalanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 270 of the SLC6A1 protein (p.Phe270Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of SLC6A1-related conditions (PMID: 29315614). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 520878). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt SLC6A1 protein function. Experimental studies have shown that this missense change affects SLC6A1 function (PMID: 30132828). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.30
Cadd	Uncertain	26
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D;D;D;D;D;.;D;.;D;D;D;D;.;D;D;D;.;D;D;D;.;D;D;D;.;.
Eigen	Uncertain	0.32
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.92	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.083	D
MutationAssessor	Pathogenic	3.3	M;M;M;M;M;.;M;.;M;M;M;M;.;M;M;M;.;M;M;M;.;M;M;M;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.85	D
Polyphen		0.010	B;B;B;B;B;.;B;.;B;B;B;B;.;B;B;B;.;B;B;B;.;B;B;B;.;.
Vest4		0.99
MutPred		0.80		Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);.;Loss of stability (P = 0.031);.;Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);.;Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);.;Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);.;Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);Loss of stability (P = 0.031);
MVP		0.92
MPC		1.9
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.92
gMVP		0.86

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

LitVar

Other links and lift over

dbSNP: rs1553689580; hg19: chr3-11067229;