1-99902729-T-C

Variant names:

• chr1-99902729-T-C
• rs779439947
• NM_000642.3:c.3635T>C

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_000028.3(AGL):​c.3635T>C​(p.Met1212Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000013 in 1,613,556 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. M1212L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: AGL NM_000028.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 5.92
• 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: Likely_benign. The variant received -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.3261655).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000028.3. 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.3635T>C	p.Met1212Thr	missense	Exon 27 of 34	NP_000633.2
	AGL	NM_000028.3		c.3635T>C	p.Met1212Thr	missense	Exon 27 of 34	NP_000019.2
	AGL	NM_000643.3		c.3635T>C	p.Met1212Thr	missense	Exon 27 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.3635T>C	p.Met1212Thr	missense	Exon 27 of 34	ENSP00000355106.3
	AGL	ENST00000294724.8	TSL:1	c.3635T>C	p.Met1212Thr	missense	Exon 27 of 34	ENSP00000294724.4
	AGL	ENST00000370163.7	TSL:1	c.3635T>C	p.Met1212Thr	missense	Exon 27 of 34	ENSP00000359182.3

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152166 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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: 0.00316

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000160 AC: 4 AN: 250738 AF XY: 0.0000221

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

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: 0.0000123 AC: 18 AN: 1461272 Hom.: 0 Cov.: 31 AF XY: 0.0000151 AC XY: 11 AN XY: 726956

African (AFR) AF: 0.0000299 AC: 1 AN: 33468

American (AMR) AF: 0.00 AC: 0 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26114

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53362

Middle Eastern (MID) AF: 0.00104 AC: 6 AN: 5764

European-Non Finnish (NFE) AF: 0.00000900 AC: 10 AN: 1111590

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

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152284 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74476

African (AFR) AF: 0.0000240 AC: 1 AN: 41584

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

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5172

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68022

Other (OTH) AF: 0.00 AC: 0 AN: 2112

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	4	-	Glycogen storage disease type III (4)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.066	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.075	T
Eigen	Benign	-0.041
Eigen_PC	Benign	0.17
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.33	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.97	L
PhyloP100		5.9
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.16
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.044	D
Polyphen		0.0010	B
Vest4		0.44
MutPred		0.63		Loss of MoRF binding (P = 0.1087)
MVP		0.83
MPC		0.049
ClinPred		0.35	T
GERP RS		5.9
Varity_R		0.16
gMVP		0.69
Mutation Taster		=94/6	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: rs779439947; hg19: chr1-100368285;