10-87062648-G-A

Variant names:

• chr10-87062648-G-A
• rs148463565
• NM_005271.5:c.921+8C>T

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_005271.5(GLUD1):​c.921+8C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000373 in 1,608,834 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: GLUD1 NM_005271.5 splice_region, intron
• Scores: Splicing: ADA: 0.00002677
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0360
• Publications: 0 publications found

Genes affected

GLUD1 (HGNC:4335): (glutamate dehydrogenase 1) This gene encodes glutamate dehydrogenase, which is a mitochondrial matrix enzyme that catalyzes the oxidative deamination of glutamate to alpha-ketoglutarate and ammonia. This enzyme has an important role in regulating amino acid-induced insulin secretion. It is allosterically activated by ADP and inhibited by GTP and ATP. Activating mutations in this gene are a common cause of congenital hyperinsulinism. Alternative splicing of this gene results in multiple transcript variants. The related glutamate dehydrogenase 2 gene on the human X-chromosome originated from this gene via retrotransposition and encodes a soluble form of glutamate dehydrogenase. Related pseudogenes have been identified on chromosomes 10, 18 and X. [provided by RefSeq, Jan 2016]

GLUD1 Gene-Disease associations (from GenCC):

• hyperinsulinism-hyperammonemia syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Orphanet

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BS2: High AC in GnomAd4 at 5 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005271.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GLUD1	NM_005271.5	MANE Select	c.921+8C>T		splice_region intron	N/A	NP_005262.1	P00367-1
	GLUD1	NM_001318900.1		c.522+8C>T		splice_region intron	N/A	NP_001305829.1	P00367-3
	GLUD1	NM_001318901.1		c.420+8C>T		splice_region intron	N/A	NP_001305830.1	P00367-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GLUD1	ENST00000277865.5	TSL:1 MANE Select	c.921+8C>T		splice_region intron	N/A	ENSP00000277865.4	P00367-1
	GLUD1	ENST00000915201.1		c.969+8C>T		splice_region intron	N/A	ENSP00000585260.1
	GLUD1	ENST00000898383.1		c.921+8C>T		splice_region intron	N/A	ENSP00000568442.1

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 151812 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000804 AC: 2 AN: 248692 AF XY: 0.00

Gnomad AFR exome AF: 0.000125

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1456904 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 724768

African (AFR) AF: 0.0000300 AC: 1 AN: 33300

American (AMR) AF: 0.00 AC: 0 AN: 44396

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26006

East Asian (EAS) AF: 0.00 AC: 0 AN: 39656

South Asian (SAS) AF: 0.00 AC: 0 AN: 85774

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53332

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5750

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108496

Other (OTH) AF: 0.00 AC: 0 AN: 60194

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 151930 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74250

African (AFR) AF: 0.000121 AC: 5 AN: 41484

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10448

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67926

Other (OTH) AF: 0.00 AC: 0 AN: 2106

Alfa AF: 0.0000205 Hom.: 0

Bravo AF: 0.0000227

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	2.5
DANN	Benign	0.37
PhyloP100		-0.036

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000027
dbscSNV1_RF	Benign	0.0
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: rs148463565; hg19: chr10-88822405;