rs2297977

Variant names:

• chr1-42949617-G-T
• rs2297977
• NM_006516.4:c.19-6296C>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_006516.4(SLC2A1):​c.19-6296C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.23 in 152,114 control chromosomes in the GnomAD database, including 4,151 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.23 (4151 hom., cov: 32)
• Consequence: SLC2A1 NM_006516.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.03
• Publications: 8 publications found

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]

SLC2A1 Gene-Disease associations (from GenCC):

• encephalopathy due to GLUT1 deficiency

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• GLUT1 deficiency syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• childhood onset GLUT1 deficiency syndrome 2

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
• dystonia 9

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• epilepsy, idiopathic generalized, susceptibility to, 12

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• childhood absence epilepsy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary cryohydrocytosis with reduced stomatin

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• myoclonic-astatic epilepsy

  Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.66).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.253 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC2A1	NM_006516.4	c.19-6296C>A		intron_variant	Intron 1 of 9	ENST00000426263.10	NP_006507.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC2A1	ENST00000426263.10	c.19-6296C>A		intron_variant	Intron 1 of 9	1	NM_006516.4	ENSP00000416293.2

Frequencies

GnomAD3 genomes AF: 0.230 AC: 34964 AN: 151996 Hom.: 4151 Cov.: 32

Gnomad AFR AF: 0.257

Gnomad AMI AF: 0.161

Gnomad AMR AF: 0.249

Gnomad ASJ AF: 0.230

Gnomad EAS AF: 0.214

Gnomad SAS AF: 0.207

Gnomad FIN AF: 0.248

Gnomad MID AF: 0.275

Gnomad NFE AF: 0.210

Gnomad OTH AF: 0.224

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.230 AC: 34986 AN: 152114 Hom.: 4151 Cov.: 32 AF XY: 0.233 AC XY: 17331 AN XY: 74360

African (AFR) AF: 0.257 AC: 10660 AN: 41462

American (AMR) AF: 0.249 AC: 3811 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.230 AC: 796 AN: 3466

East Asian (EAS) AF: 0.214 AC: 1107 AN: 5180

South Asian (SAS) AF: 0.208 AC: 1001 AN: 4824

European-Finnish (FIN) AF: 0.248 AC: 2620 AN: 10566

Middle Eastern (MID) AF: 0.272 AC: 80 AN: 294

European-Non Finnish (NFE) AF: 0.210 AC: 14288 AN: 68006

Other (OTH) AF: 0.225 AC: 476 AN: 2114

Alfa AF: 0.215 Hom.: 12367

Bravo AF: 0.230

Asia WGS AF: 0.229 AC: 796 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	17
DANN	Benign	0.74
PhyloP100		1.0
Mutation Taster		=100/0	polymorphism (auto)

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: rs2297977; hg19: chr1-43415288;