rs760763834

Variant names:

• chr1-99862303-C-T
• rs760763834
• NM_000642.3:c.340C>T

Variant summary

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

The NM_000642.3(AGL):​c.340C>T​(p.Arg114Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000143 in 1,613,804 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R114H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000039 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000012 (1 hom.)
• Consequence: AGL NM_000642.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 2.08
• Publications: 1 publications found

Genes affected

AGL (HGNC:321): (amylo-alpha-1, 6-glucosidase, 4-alpha-glucanotransferase) This gene encodes the glycogen debrancher enzyme which is involved in glycogen degradation. This enzyme has two independent catalytic activities which occur at different sites on the protein: a 4-alpha-glucotransferase activity and a amylo-1,6-glucosidase activity. Mutations in this gene are associated with glycogen storage disease although a wide range of enzymatic and clinical variability occurs which may be due to tissue-specific alternative splicing. Alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

AGL Gene-Disease associations (from GenCC):

• glycogen storage disease III

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, Laboratory for Molecular Medicine, Myriad Women’s Health, Orphanet, G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp

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 (MetaRNN=0.11782643).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000642.3. 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
	AGL	NM_000642.3	MANE Select	c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	NP_000633.2
	AGL	NM_000028.3		c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	NP_000019.2
	AGL	NM_000643.3		c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	NP_000634.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGL	ENST00000361915.8	TSL:1 MANE Select	c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	ENSP00000355106.3
	AGL	ENST00000294724.8	TSL:1	c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	ENSP00000294724.4
	AGL	ENST00000370163.7	TSL:1	c.340C>T	p.Arg114Cys	missense	Exon 4 of 34	ENSP00000359182.3

Frequencies

GnomAD3 genomes AF: 0.0000395 AC: 6 AN: 151998 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000966

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: 0.0000147

Gnomad OTH AF: 0.000480

GnomAD2 exomes AF: 0.0000318 AC: 8 AN: 251476 AF XY: 0.0000147

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000116 AC: 17 AN: 1461806 Hom.: 1 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 727210

African (AFR) AF: 0.0000896 AC: 3 AN: 33478

American (AMR) AF: 0.0000447 AC: 2 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39672

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000630 AC: 7 AN: 1111972

Other (OTH) AF: 0.0000166 AC: 1 AN: 60390

GnomAD4 genome AF: 0.0000395 AC: 6 AN: 151998 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74244

African (AFR) AF: 0.0000966 AC: 4 AN: 41394

American (AMR) AF: 0.00 AC: 0 AN: 15250

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3464

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10564

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68006

Other (OTH) AF: 0.000480 AC: 1 AN: 2084

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.0000416

ExAC AF: 0.0000247 AC: 3

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	2	-	Glycogen storage disease type III (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	22
DANN	Benign	0.58
DEOGEN2	Benign	0.14	T
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.91
FATHMM_MKL	Benign	0.15	N
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.3	L
PhyloP100		2.1
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.10
Sift	Benign	0.14	T
Sift4G	Benign	0.081	T
Polyphen		0.0	B
Vest4		0.44
MVP		0.53
MPC		0.050
ClinPred		0.028	T
GERP RS		2.6
Varity_R		0.059
gMVP		0.66
Mutation Taster		=86/14	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs760763834; hg19: chr1-100327859;