chr5-36608517-A-C

Position:

• chr5-36608517-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004172.5(SLC1A3):​c.94A>C​(p.Lys32Gln) 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 benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC1A3 NM_004172.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.07

Genes affected

SLC1A3 (HGNC:10941): (solute carrier family 1 member 3) This gene encodes a member of a member of a high affinity glutamate transporter family. This gene functions in the termination of excitatory neurotransmission in central nervous system. Mutations are associated with episodic ataxia, Type 6. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Feb 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28727847).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC1A3	NM_004172.5	c.94A>C	p.Lys32Gln	missense_variant	2/10	ENST00000265113.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC1A3	ENST00000265113.9	c.94A>C	p.Lys32Gln	missense_variant	2/10	1	NM_004172.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 19, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant  is likely to be tolerated. This variant has not been reported in the literature in individuals affected with SLC1A3-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with glutamine, which is neutral and polar, at codon 32 of the SLC1A3 protein (p.Lys32Gln). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.050	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.011	T;.;T;T;T;T;.
Eigen	Benign	0.036
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.93	D;D;D;D;.;D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.29	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	.;.;L;.;.;.;L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-0.19	.;.;N;N;N;N;N
REVEL	Benign	0.097
Sift	Benign	0.13	.;.;T;T;T;T;T
Sift4G	Benign	0.30	T;T;T;T;T;T;T
Polyphen		0.024	.;.;B;.;.;.;.
Vest4		0.42
MutPred		0.41		Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);Loss of methylation at K32 (P = 0.0043);
MVP		0.66
MPC		0.46
ClinPred		0.85	D
GERP RS		5.5
Varity_R		0.21
gMVP		0.56

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: chr5-36608619;