12-48133403-C-A

Variant names:

• chr12-48133403-C-A
• NM_000289.6:c.516C>A
• PFKM p.Thr172Thr

Variant summary

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

The NM_000289.6(PFKM):​c.516C>A​(p.Thr172Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T172T) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PFKM NM_000289.6 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -3.96
• Publications: 0 publications found

Genes affected

PFKM (HGNC:8877): (phosphofructokinase, muscle) Three phosphofructokinase isozymes exist in humans: muscle, liver and platelet. These isozymes function as subunits of the mammalian tetramer phosphofructokinase, which catalyzes the phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate. Tetramer composition varies depending on tissue type. This gene encodes the muscle-type isozyme. Mutations in this gene have been associated with glycogen storage disease type VII, also known as Tarui disease. Alternatively spliced transcript variants have been described.[provided by RefSeq, Nov 2009]

PFKM Gene-Disease associations (from GenCC):

• glycogen storage disease VII

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

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_000289.6. 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
	PFKM	NM_000289.6	MANE Select	c.516C>A	p.Thr172Thr	synonymous	Exon 6 of 23	NP_000280.1	P08237-1
	PFKM	NM_001354735.1		c.825C>A	p.Thr275Thr	synonymous	Exon 9 of 26	NP_001341664.1	A0A2R8Y891
	PFKM	NM_001354736.1		c.825C>A	p.Thr275Thr	synonymous	Exon 9 of 26	NP_001341665.1	A0A2R8Y891

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PFKM	ENST00000359794.11	TSL:1 MANE Select	c.516C>A	p.Thr172Thr	synonymous	Exon 6 of 23	ENSP00000352842.5	P08237-1
	PFKM	ENST00000312352.11	TSL:1	c.516C>A	p.Thr172Thr	synonymous	Exon 6 of 23	ENSP00000309438.7	P08237-1
	PFKM	ENST00000547587.5	TSL:1	c.516C>A	p.Thr172Thr	synonymous	Exon 5 of 22	ENSP00000449426.1	P08237-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.29
CADD	Benign	11
DANN	Benign	0.79
PhyloP100		-4.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.36		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.36		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr12-48527186;