7-134661820-T-G

Position:

• chr7-134661820-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_001724.5(BPGM):​c.313T>G​(p.Leu105Val) variant causes a missense 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BPGM NM_001724.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.328

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 Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a chain Bisphosphoglycerate mutase (size 257) in uniprot entity PMGE_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_001724.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09006128).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BPGM	NM_001724.5	c.313T>G	p.Leu105Val	missense_variant	2/3	ENST00000344924.8	NP_001715.1
LOC124901750	XR_007060537.1	n.29222-41872A>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BPGM	ENST00000344924.8	c.313T>G	p.Leu105Val	missense_variant	2/3	1	NM_001724.5	ENSP00000342032	P1
BPGM	ENST00000393132.2	c.313T>G	p.Leu105Val	missense_variant	3/4	5		ENSP00000376840	P1
BPGM	ENST00000418040.5	c.313T>G	p.Leu105Val	missense_variant	3/4	5		ENSP00000399838	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 18, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with BPGM-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 105 of the BPGM protein (p.Leu105Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.074	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	16
DANN	Uncertain	0.98
DEOGEN2	Benign	0.074	T;T;T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.39
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.79	.;.;T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.090	T;T;T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	0.45	N;N;N
MutationTaster	Benign	0.99	D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	0.11	N;N;N
REVEL	Benign	0.050
Sift	Benign	0.089	T;T;T
Sift4G	Benign	0.19	T;T;T
Polyphen		0.022	B;B;B
Vest4		0.23
MutPred		0.32		Gain of MoRF binding (P = 0.0878);Gain of MoRF binding (P = 0.0878);Gain of MoRF binding (P = 0.0878);
MVP		0.53
MPC		0.40
ClinPred		0.12	T
GERP RS		2.4
Varity_R		0.31
gMVP		0.69

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: chr7-134346572;