NM_002633.3:c.23A>G

Variant names:

• chr1-63593511-A-G
• NM_002633.3:c.23A>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002633.3(PGM1):​c.23A>G​(p.Lys8Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,554 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/18 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. K8N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PGM1 NM_002633.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.58

Genes affected

PGM1 (HGNC:8905): (phosphoglucomutase 1) The protein encoded by this gene is an isozyme of phosphoglucomutase (PGM) and belongs to the phosphohexose mutase family. There are several PGM isozymes, which are encoded by different genes and catalyze the transfer of phosphate between the 1 and 6 positions of glucose. In most cell types, this PGM isozyme is predominant, representing about 90% of total PGM activity. In red cells, PGM2 is a major isozyme. This gene is highly polymorphic. Mutations in this gene cause glycogen storage disease type 14. Alternativley spliced transcript variants encoding different isoforms have been identified in this gene.[provided by RefSeq, Mar 2010]

ITGB3BP (HGNC:6157): (integrin subunit beta 3 binding protein) This gene encodes a transcriptional coregulator that binds to and enhances the activity of members of the nuclear receptor families, thyroid hormone receptors and retinoid X receptors. This protein also acts as a corepressor of NF-kappaB-dependent signaling. This protein induces apoptosis in breast cancer cells through a caspase 2-mediated signaling pathway. This protein is also a component of the centromere-specific histone H3 variant nucleosome associated complex (CENP-NAC) and may be involved in mitotic progression by recruiting the histone H3 variant CENP-A to the centromere. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26099142).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PGM1	NM_002633.3	c.23A>G	p.Lys8Arg	missense_variant	Exon 1 of 11	ENST00000371084.8	NP_002624.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PGM1	ENST00000371084.8	c.23A>G	p.Lys8Arg	missense_variant	Exon 1 of 11	1	NM_002633.3	ENSP00000360125.3
PGM1	ENST00000650546.1	c.23A>G	p.Lys8Arg	missense_variant	Exon 1 of 12			ENSP00000497812.1
ITGB3BP	ENST00000478138.1	n.197+14T>C		intron_variant	Intron 1 of 4	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461554 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727098

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Jul 13, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.23A>G (p.K8R) alteration is located in exon 1 (coding exon 1) of the PGM1 gene. This alteration results from a A to G substitution at nucleotide position 23, causing the lysine (K) at amino acid position 8 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.35	T;.
Eigen	Benign	-0.021
Eigen_PC	Benign	0.097
FATHMM_MKL	Benign	0.63	D
LIST_S2	Benign	0.84	T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.26	T;T
MetaSVM	Benign	-0.86	T
MutationAssessor	Benign	1.8	L;.
PROVEAN	Benign	-0.65	N;.
REVEL	Benign	0.16
Sift	Benign	0.10	T;.
Sift4G	Benign	0.079	T;.
Polyphen		0.0	B;.
Vest4		0.17
MutPred		0.29		Loss of methylation at K8 (P = 0.008);Loss of methylation at K8 (P = 0.008);
MVP		0.74
ClinPred		0.74	D
GERP RS		4.4
Varity_R		0.39

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-64059182;