chr7-134661566-AC-A

Position:

• chr7-134661566-AC-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_001724.5(BPGM):​c.61del​(p.Arg21ValfsTer28) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,866 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: BPGM NM_001724.5 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.408

Genes affected

BPGM (HGNC:1093): (bisphosphoglycerate mutase) 2,3-diphosphoglycerate (2,3-DPG) is a small molecule found at high concentrations in red blood cells where it binds to and decreases the oxygen affinity of hemoglobin. This gene encodes a multifunctional enzyme that catalyzes 2,3-DPG synthesis via its synthetase activity, and 2,3-DPG degradation via its phosphatase activity. The enzyme also has phosphoglycerate phosphomutase activity. Deficiency of this enzyme increases the affinity of cells for oxygen. Mutations in this gene result in hemolytic anemia. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Sep 2009]

LOC124901750 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 4 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-134661566-AC-A is Pathogenic according to our data. Variant chr7-134661566-AC-A is described in ClinVar as [Pathogenic]. Clinvar id is 12092.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr7-134661566-AC-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BPGM	NM_001724.5	c.61del	p.Arg21ValfsTer28	frameshift_variant	2/3	ENST00000344924.8	NP_001715.1
LOC124901750	XR_007060537.1	n.29222-41619del		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BPGM	ENST00000344924.8	c.61del	p.Arg21ValfsTer28	frameshift_variant	2/3	1	NM_001724.5	ENSP00000342032	P1
BPGM	ENST00000393132.2	c.61del	p.Arg21ValfsTer28	frameshift_variant	3/4	5		ENSP00000376840	P1
BPGM	ENST00000418040.5	c.61del	p.Arg21ValfsTer28	frameshift_variant	3/4	5		ENSP00000399838	P1
BPGM	ENST00000443095.1	c.61del	p.Arg21ValfsTer28	frameshift_variant	2/2	4		ENSP00000403050

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461866 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727234

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Deficiency of bisphosphoglycerate mutase Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 15, 1992

- -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs786205092; hg19: chr7-134346318;