1-99902707-C-G

Variant names:

• chr1-99902707-C-G
• rs775498547
• NM_000642.3:c.3613C>G

Variant summary

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

The NM_000642.3(AGL):​c.3613C>G​(p.Gln1205Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000404 in 1,461,034 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. Q1205Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000040 (0 hom.)
• Consequence: AGL NM_000642.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 7.54
• Publications: 2 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: Ambry Genetics, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Laboratory for Molecular Medicine, Myriad Women’s Health

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGL	NM_000642.3	MANE Select	c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	NP_000633.2	P35573-1
	AGL	NM_000028.3		c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	NP_000019.2	P35573-1
	AGL	NM_000643.3		c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	NP_000634.2	A0A0S2A4E4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGL	ENST00000361915.8	TSL:1 MANE Select	c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	ENSP00000355106.3	P35573-1
	AGL	ENST00000294724.8	TSL:1	c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	ENSP00000294724.4	P35573-1
	AGL	ENST00000370163.7	TSL:1	c.3613C>G	p.Gln1205Glu	missense	Exon 27 of 34	ENSP00000359182.3	P35573-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 250638 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000579

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000265

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000404 AC: 59 AN: 1461034 Hom.: 0 Cov.: 30 AF XY: 0.0000385 AC XY: 28 AN XY: 726864

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.0000224 AC: 1 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39654

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53346

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000513 AC: 57 AN: 1111378

Other (OTH) AF: 0.0000166 AC: 1 AN: 60350

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000406 Hom.: 0

Bravo AF: 0.0000189

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000259 AC: 1

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Glycogen storage disease type III (2)
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.025	T
BayesDel_noAF	Benign	-0.10
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.24	T
Eigen	Pathogenic	0.73
Eigen_PC	Pathogenic	0.74
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.036	D
MetaRNN	Uncertain	0.65	D
MetaSVM	Benign	-0.38	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		7.5
PrimateAI	Uncertain	0.52	T
PROVEAN	Uncertain	-2.4	N
REVEL	Uncertain	0.46
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.023	D
Polyphen		0.93	P
Vest4		0.56
MutPred		0.73		Gain of ubiquitination at K1210 (P = 0.1191)
MVP		0.87
MPC		0.25
ClinPred		0.74	D
GERP RS		6.0
Varity_R		0.38
gMVP		0.82
Mutation Taster		=55/45	polymorphism

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: rs775498547; hg19: chr1-100368263; COSMIC: COSV99038330;