NM_006516.4:c.988C>G

Variant names:

• chr1-42929018-G-C
• rs80359826
• NM_006516.4:c.988C>G
• SLC2A1 p.Arg330Gly

GermlineCancer (beta)

Variant summary

Our verdict is Likely pathogenic.

+7 Likely Pathogenic

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 7 classification points (ACMG Germline Pathogenicity v2019). PM1PM2PP2PP3_Moderate

The NM_006516.4(SLC2A1):c.988C>G (p.Arg330Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (REVEL) classifies this variant as likely damaging/oncogenic. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.R330Q: Uncertain_significance (ClinVar VariationId 3618512, 2 stars); p.R330= (synonymous): Likely_benign (ClinVar VariationId 702407, 1 star)

• Frequency: Genomes: not found (cov: 33)
• Consequence: SLC2A1 NM_006516.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.55
• Publications: 10 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), Orphanet, G2P
• GLUT1 deficiency syndrome

  Inheritance: SD, AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, 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: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
• 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

Classification according to ACMG Germline Pathogenicity v2019

Classification was made for transcript:

Our verdict: Likely_pathogenic. The variant received 7 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	PM1Mutational hot spot or critical domain		UniProt domain with ≥4 pathogenic missense and OR ≥ 5 vs. background — hotspot (PM1); In-domain: 4 pathogenic, 0 benign rare missense variants (OR vs. background: 45.0).; ±8 AA neighbourhood: 11 pathogenic, 0 benign (OR vs. background: 115.0).
	PM2Absent/extremely low in population databases		Absent from gnomAD (AD/XL gene) — PM2; Absent from gnomAD at well-covered site (MOI: AD+AR) (threshold 0.0001) — PM2 moderate.
	PP2Missense in gene with low missense rate		Missense in gene constrained for missense variation where missense is common disease mechanism (PP2); Missense in a gene constrained for missense variation (gnomAD Z-score: 4.681). ClinVar shows strong pathogenic missense enrichment: 154 P/LP and 25 B/LB missense entries (ratio 6.2×).
	PP3Computational evidence supports damaging effect		Germline meta computational scorer (REVEL/MetaRNN/BayesDel) predicts damaging effect — moderate evidence (PP3); Splicing verdict: not pathogenic.; Germline computational verdict: pathogenic (Moderate).

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_006516.4. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	SLC2A1 NM_006516.4	MANE Select	c.988C>G p.Arg330Gly	missense	Exon 8 of 10	Prot: NP_006507.2 UniProt:

SLC2A1 NM_006516.4

MANE Select

HGVSc / HGVSpc.988C>Gp.Arg330Gly

Exon rankExon 8 of 10

missense

Prot: NP_006507.2UniProt: P11166

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	SLC2A1 ENST00000426263.10	TSL:1MANE Select	c.988C>G p.Arg330Gly	missense	Exon 8 of 10	Prot: ENSP00000416293.2 UniProt:
	SLC2A1 ENST00000889577.1		c.985C>G p.Arg329Gly	missense	Exon 8 of 10	Prot: ENSP00000559636.1 UniProt:
	SLC2A1 ENST00000958848.1		c.988C>G p.Arg330Gly	missense	Exon 8 of 10	Prot: ENSP00000628907.1 UniProt:

SLC2A1 ENST00000426263.10

TSL:1MANE Select

HGVSc / HGVSpc.988C>Gp.Arg330Gly

Exon rankExon 8 of 10

missense

Prot: ENSP00000416293.2UniProt: P11166

SLC2A1 ENST00000889577.1

HGVSc / HGVSpc.985C>Gp.Arg329Gly

Exon rankExon 8 of 10

missense

Prot: ENSP00000559636.1UniProt: A0ACI8RFT3

SLC2A1 ENST00000958848.1

HGVSc / HGVSpc.988C>Gp.Arg330Gly

Exon rankExon 8 of 10

missense

Prot: ENSP00000628907.1UniProt: A0ACI8V0G7

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 3 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:33
GnomAD4 exome	AF:	AC:	Hom:	AN:	Cov:32
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:33

Showing 3 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Pathogenic	24
AlphaMissense	Uncertain	0.51
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.92	D
Eigen	Pathogenic	0.74
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.95	D
FuncVEP CTI	Benign	0.24
GPN-Star LLR	N/A	-9.5
GPN-Star score	N/A	9.5
LIST_S2	Benign	0.76	T
M_CAP	Pathogenic	0.38	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	0.83	D
Mutation Taster	N/A	34/66	disease causing
MutationAssessor	Pathogenic	3.7	H
PhyloP100	Uncertain	4.5
popEVE	Benign	-4.2
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.023	D
Varity_R	N/A	0.91
VESM-3B	Benign	-9.8

Showing 28 of 28 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.020
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs80359826;

hg19: chr1-43394689;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar