rs2229681

chr1-42928995-G-Achr1-42928995-G-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_006516.4(SLC2A1):c.1011C>T(p.His337=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0148 in 1,613,778 control chromosomes in the GnomAD database, including 2,452 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.071 (1279 hom., cov: 33)
  • Exomes 𝑓: 0.0088 (1173 hom.)
• Consequence: SLC2A1 NM_006516.4 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:17
• Conservation: PhyloP100: 3.27

Genes affected

SLC2A1 (HGNC:11005): (solute carrier family 2 member 1) This gene encodes a major glucose transporter in the mammalian blood-brain barrier. The encoded protein is found primarily in the cell membrane and on the cell surface, where it can also function as a receptor for human T-cell leukemia virus (HTLV) I and II. Mutations in this gene have been found in a family with paroxysmal exertion-induced dyskinesia. [provided by RefSeq, Apr 2013]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.56).
• BP6: Variant 1-42928995-G-A is Benign according to our data. Variant chr1-42928995-G-A is described in ClinVar as [Benign]. Clinvar id is 95406.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-42928995-G-A is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=3.27 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.24 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC2A1	NM_006516.4	c.1011C>T	p.His337=	synonymous_variant	8/10	ENST00000426263.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC2A1	ENST00000426263.10	c.1011C>T	p.His337=	synonymous_variant	8/10	1	NM_006516.4	P1

Frequencies

GnomAD3 genomes AF: 0.0711 AC: 10824 AN: 152198 Hom.: 1265 Cov.: 33

Gnomad AFR AF: 0.244

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0276

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00250

Gnomad SAS AF: 0.0281

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000896

Gnomad OTH AF: 0.0488

GnomAD3 exomes AF: 0.0214 AC: 5365 AN: 250780 Hom.: 534 AF XY: 0.0175 AC XY: 2380 AN XY: 135654

Gnomad AFR exome AF: 0.246

Gnomad AMR exome AF: 0.0131

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00435

Gnomad SAS exome AF: 0.0226

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000758

Gnomad OTH exome AF: 0.0109

GnomAD4 exome AF: 0.00885 AC: 12931 AN: 1461462 Hom.: 1173 Cov.: 32 AF XY: 0.00843 AC XY: 6129 AN XY: 727090

Gnomad4 AFR exome AF: 0.253

Gnomad4 AMR exome AF: 0.0143

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00191

Gnomad4 SAS exome AF: 0.0229

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000487

Gnomad4 OTH exome AF: 0.0189

GnomAD4 genome AF: 0.0715 AC: 10885 AN: 152316 Hom.: 1279 Cov.: 33 AF XY: 0.0694 AC XY: 5169 AN XY: 74486

Gnomad4 AFR AF: 0.244

Gnomad4 AMR AF: 0.0276

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00251

Gnomad4 SAS AF: 0.0275

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000897

Gnomad4 OTH AF: 0.0482

Alfa AF: 0.0257 Hom.: 173

Bravo AF: 0.0793

Asia WGS AF: 0.0290 AC: 102 AN: 3478

EpiCase AF: 0.000545

EpiControl AF: 0.00119

ClinVar

Significance: Benign

Submissions summary: Benign:17

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:8

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 22, 2012	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jul 14, 2014	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

Dystonia 9 Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -

Encephalopathy due to GLUT1 deficiency Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -

Inborn genetic diseases Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 25, 2016

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Childhood onset GLUT1 deficiency syndrome 2 Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

GLUT1 deficiency syndrome 1, autosomal recessive Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Feb 01, 2024

- -

Hereditary cryohydrocytosis with reduced stomatin Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

Epilepsy, idiopathic generalized, susceptibility to, 12 Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.56
Cadd	Benign	9.4
Dann	Benign	0.91
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.7

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: rs2229681; hg19: chr1-43394666;