rs145536989

Variant names:

• chr14-50885769-T-C
• rs145536989
• NM_001206673.2:c.536T>C

Your query was ambiguous. Multiple possible variants found:

• chr14-50885769-T-C
• chr14-50885769-T-G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001206673.2(ABHD12B):​c.536T>C​(p.Phe179Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,614,046 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. F179C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000036 (0 hom.)
• Consequence: ABHD12B NM_001206673.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.281
• Publications: 0 publications found

Genes affected

ABHD12B (HGNC:19837): (abhydrolase domain containing 12B) Predicted to enable acylglycerol lipase activity; lysophospholipase activity; and palmitoyl-(protein) hydrolase activity. Predicted to be involved in monoacylglycerol catabolic process and phosphatidylserine catabolic process. Predicted to be active in endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

PYGL (HGNC:9725): (glycogen phosphorylase L) This gene encodes a homodimeric protein that catalyses the cleavage of alpha-1,4-glucosidic bonds to release glucose-1-phosphate from liver glycogen stores. This protein switches from inactive phosphorylase B to active phosphorylase A by phosphorylation of serine residue 15. Activity of this enzyme is further regulated by multiple allosteric effectors and hormonal controls. Humans have three glycogen phosphorylase genes that encode distinct isozymes that are primarily expressed in liver, brain and muscle, respectively. The liver isozyme serves the glycemic demands of the body in general while the brain and muscle isozymes supply just those tissues. In glycogen storage disease type VI, also known as Hers disease, mutations in liver glycogen phosphorylase inhibit the conversion of glycogen to glucose and results in moderate hypoglycemia, mild ketosis, growth retardation and hepatomegaly. Alternative splicing results in multiple transcript variants encoding different isoforms.[provided by RefSeq, Feb 2011]

PYGL Gene-Disease associations (from GenCC):

• glycogen storage disease VI

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3959796).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001206673.2. 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
	ABHD12B	NM_001206673.2	MANE Select	c.536T>C	p.Phe179Ser	missense	Exon 7 of 13	NP_001193602.1	Q7Z5M8-1
	ABHD12B	NM_181814.2		c.305T>C	p.Phe102Ser	missense	Exon 5 of 11	NP_861535.1	Q7Z5M8-2
	ABHD12B	NM_181533.4		c.215T>C	p.Phe72Ser	missense	Exon 6 of 12	NP_853511.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABHD12B	ENST00000337334.7	TSL:1 MANE Select	c.536T>C	p.Phe179Ser	missense	Exon 7 of 13	ENSP00000336693.2	Q7Z5M8-1
	ABHD12B	ENST00000353130.5	TSL:1	c.305T>C	p.Phe102Ser	missense	Exon 5 of 11	ENSP00000343951.1	Q7Z5M8-2
	PYGL	ENST00000532462.5	TSL:1	c.2379+22502A>G		intron	N/A	ENSP00000431657.1	E9PK47

Frequencies

GnomAD3 genomes AF: 0.0000657 AC: 10 AN: 152158 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000966

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.0000735

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000597 AC: 15 AN: 251420 AF XY: 0.0000736

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.0000867

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.0000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000356 AC: 52 AN: 1461888 Hom.: 0 Cov.: 31 AF XY: 0.0000316 AC XY: 23 AN XY: 727244

African (AFR) AF: 0.000119 AC: 4 AN: 33480

American (AMR) AF: 0.0000671 AC: 3 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.0000374 AC: 2 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000360 AC: 40 AN: 1112008

Other (OTH) AF: 0.0000331 AC: 2 AN: 60396

GnomAD4 genome AF: 0.0000657 AC: 10 AN: 152158 Hom.: 0 Cov.: 31 AF XY: 0.0000538 AC XY: 4 AN XY: 74332

African (AFR) AF: 0.0000966 AC: 4 AN: 41428

American (AMR) AF: 0.0000655 AC: 1 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

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

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68020

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.0000434 Hom.: 0

Bravo AF: 0.0000642

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000494 AC: 6

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Benign	-0.0044	T
BayesDel_noAF	Uncertain	-0.050
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.031	T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Benign	0.60	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.40	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.9	M
PhyloP100		0.28
PrimateAI	Uncertain	0.53	T
PROVEAN	Pathogenic	-6.3	D
REVEL	Uncertain	0.29
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		0.95	P
Vest4		0.59
MVP		0.30
MPC		0.43
ClinPred		0.59	D
GERP RS		4.6
Varity_R		0.83
gMVP		0.84
Mutation Taster		=62/38	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs145536989; hg19: chr14-51352487;