5-79119274-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_001713.3(BHMT):c.182G>A(p.Arg61Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000342 in 1,608,308 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 1 hom., cov: 33)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

BHMT
NM_001713.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.57

Variant links:

Genes affected

BHMT (HGNC:1047): (betaine--homocysteine S-methyltransferase) This gene encodes a cytosolic enzyme that catalyzes the conversion of betaine and homocysteine to dimethylglycine and methionine, respectively. Defects in this gene could lead to hyperhomocyst(e)inemia, but such a defect has not yet been observed. [provided by RefSeq, Jul 2008]

BHMT links:

LOC124901012 (HGNC:):

LOC124901012 links:

DMGDH (HGNC:24475): (dimethylglycine dehydrogenase) This gene encodes an enzyme involved in the catabolism of choline, catalyzing the oxidative demethylation of dimethylglycine to form sarcosine. The enzyme is found as a monomer in the mitochondrial matrix, and uses flavin adenine dinucleotide and folate as cofactors. Mutation in this gene causes dimethylglycine dehydrogenase deficiency, characterized by a fishlike body odor, chronic muscle fatigue, and elevated levels of the muscle form of creatine kinase in serum. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

DMGDH links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.747

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BHMT	NM_001713.3 link	c.182G>A	p.Arg61Gln	missense_variant	Exon 3 of 8	ENST00000274353.10	NP_001704.2	Q93088V9HWA4
LOC124901012	XR_007058837.1 link	n.42C>T		non_coding_transcript_exon_variant	Exon 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BHMT	ENST00000274353.10 link	c.182G>A	p.Arg61Gln	missense_variant	Exon 3 of 8	1	NM_001713.3	ENSP00000274353.5	Q93088
BHMT	ENST00000524080.1 link	c.166+3375G>A		intron_variant	Intron 2 of 4	2		ENSP00000428240.1	E5RJH0
BHMT	ENST00000520703.1 link	n.259G>A		non_coding_transcript_exon_variant	Exon 3 of 3	2
DMGDH	ENST00000520388.5 link	n.491+1067C>T		intron_variant	Intron 3 of 4	4

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000489

AC:

AN:

245522

Hom.:

AF XY:

0.0000377

AC XY:

AN XY:

132698

show subpopulations

Gnomad AFR exome

AF:

0.000186

Gnomad AMR exome

AF:

0.0000611

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000535

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

0.0000323

AC:

AN:

1456050

Hom.:

Cov.:

AF XY:

0.0000331

AC XY:

AN XY:

724184

show subpopulations

Gnomad4 AFR exome

AF:

0.0000302

Gnomad4 AMR exome

AF:

0.0000466

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000236

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000252

Gnomad4 OTH exome

AF:

0.000216

GnomAD4 genome

AF:

0.0000525

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74450

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000659

AC:

Asia WGS

AF:

0.00895

AC:

AN:

3478

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 20, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.182G>A (p.R61Q) alteration is located in exon 3 (coding exon 3) of the BHMT gene. This alteration results from a G to A substitution at nucleotide position 182, causing the arginine (R) at amino acid position 61 to be replaced by a glutamine (Q). 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

0.14

BayesDel_addAF

Benign

-0.072

BayesDel_noAF

Uncertain

-0.060

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.28

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.87

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.80

M_CAP

Benign

0.030

MetaRNN

Pathogenic

0.75

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.4

PrimateAI

Pathogenic

0.86

PROVEAN

Uncertain

-3.0

REVEL

Uncertain

0.39

Sift

Uncertain

0.0080

Sift4G

Benign

0.13

Polyphen

1.0

Vest4

0.86

MutPred

0.52

Loss of MoRF binding (P = 0.0185);

MVP

0.48

MPC

0.17

ClinPred

0.51

GERP RS

5.6

Varity_R

0.77

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over