ENST00000476008.1:n.480+8222G>T

Variant names:

• chr7-44189469-C-A
• rs1799884
• ENST00000476008.1:n.480+8222G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000476008.1(GCK):​n.480+8222G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GCK ENST00000476008.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.555
• Publications: 0 publications found

Genes affected

GCK (HGNC:4195): (glucokinase) This gene encodes a member of the hexokinase family of proteins. Hexokinases phosphorylate glucose to produce glucose-6-phosphate, the first step in most glucose metabolism pathways. In contrast to other forms of hexokinase, this enzyme is not inhibited by its product glucose-6-phosphate but remains active while glucose is abundant. The use of multiple promoters and alternative splicing of this gene result in distinct protein isoforms that exhibit tissue-specific expression in the pancreas and liver. In the pancreas, this enzyme plays a role in glucose-stimulated insulin secretion, while in the liver, this enzyme is important in glucose uptake and conversion to glycogen. Mutations in this gene that alter enzyme activity have been associated with multiple types of diabetes and hyperinsulinemic hypoglycemia. [provided by RefSeq, Aug 2017]

GCK Gene-Disease associations (from GenCC):

• hyperinsulinism due to glucokinase deficiency

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• maturity-onset diabetes of the young type 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• monogenic diabetes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• diabetes mellitus, noninsulin-dependent

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• permanent neonatal diabetes mellitus 1

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
• transient neonatal diabetes mellitus

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
• maturity-onset diabetes of the young

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• permanent neonatal diabetes mellitus

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.24).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000476008.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GCK	NM_000162.5	MANE Select	c.-516G>T		upstream_gene	N/A	NP_000153.1
	GCK	NM_001354800.1		c.-516G>T		upstream_gene	N/A	NP_001341729.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GCK	ENST00000476008.1	TSL:5	n.480+8222G>T		intron	N/A
	GCK	ENST00000403799.8	TSL:1 MANE Select	c.-516G>T		upstream_gene	N/A	ENSP00000384247.3
	GCK	ENST00000671824.1		c.-516G>T		upstream_gene	N/A	ENSP00000500264.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 47858 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 24760

African (AFR) AF: 0.00 AC: 0 AN: 1794

American (AMR) AF: 0.00 AC: 0 AN: 3712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 948

East Asian (EAS) AF: 0.00 AC: 0 AN: 3162

South Asian (SAS) AF: 0.00 AC: 0 AN: 5878

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 1636

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 154

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 28200

Other (OTH) AF: 0.00 AC: 0 AN: 2374

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.24
CADD	Benign	15
DANN	Benign	0.76
PhyloP100		0.56
PromoterAI		0.0053	Neutral

Splicing

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

Other links and lift over

dbSNP: rs1799884; hg19: chr7-44229068;