Genetic Variant MTHFD1:c.1674+375G>A (chr14-64439547-G-A) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_005956.4(MTHFD1):c.1674+375G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0525 in 152,092 control chromosomes in the GnomAD database, including 347 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.053 ( 347 hom., cov: 32)

Consequence

MTHFD1
NM_005956.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.55

Publications

5 publications found

Variant links:

Genes affected

MTHFD1 (HGNC:7432): (methylenetetrahydrofolate dehydrogenase, cyclohydrolase and formyltetrahydrofolate synthetase 1) This gene encodes a protein that possesses three distinct enzymatic activities, 5,10-methylenetetrahydrofolate dehydrogenase, 5,10-methenyltetrahydrofolate cyclohydrolase and 10-formyltetrahydrofolate synthetase. Each of these activities catalyzes one of three sequential reactions in the interconversion of 1-carbon derivatives of tetrahydrofolate, which are substrates for methionine, thymidylate, and de novo purine syntheses. The trifunctional enzymatic activities are conferred by two major domains, an aminoterminal portion containing the dehydrogenase and cyclohydrolase activities and a larger synthetase domain. [provided by RefSeq, Jul 2008]

MTHFD1 Gene-Disease associations (from GenCC):

combined immunodeficiency and megaloblastic anemia with or without hyperhomocysteinemia
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

MTHFD1 links:

ENSG00000258824 (HGNC:):

ENSG00000258824 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.92).

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.122 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTHFD1	NM_005956.4 link	c.1674+375G>A		intron_variant	Intron 17 of 27	ENST00000652337.1	NP_005947.3	P11586
MTHFD1	NM_001364837.1 link	c.1674+375G>A		intron_variant	Intron 17 of 26		NP_001351766.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTHFD1	ENST00000652337.1 link	c.1674+375G>A		intron_variant	Intron 17 of 27		NM_005956.4	ENSP00000498336.1		P11586

Frequencies

GnomAD3 genomes

AF:

0.0525

AC:

7975

AN:

151974

Hom.:

344

Cov.:

show subpopulations

Gnomad AFR

AF:

0.125

Gnomad AMI

AF:

0.0625

Gnomad AMR

AF:

0.0277

Gnomad ASJ

AF:

0.0124

Gnomad EAS

AF:

0.000963

Gnomad SAS

AF:

0.0166

Gnomad FIN

AF:

0.0179

Gnomad MID

AF:

0.0506

Gnomad NFE

AF:

0.0282

Gnomad OTH

AF:

0.0435

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.0525

AC:

7991

AN:

152092

Hom.:

347

Cov.:

AF XY:

0.0505

AC XY:

3755

AN XY:

74338

show subpopulations

African (AFR)

AF:

0.125

AC:

5172

AN:

41464

American (AMR)

AF:

0.0276

AC:

421

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.0124

AC:

AN:

3470

East Asian (EAS)

AF:

0.000965

AC:

AN:

5180

South Asian (SAS)

AF:

0.0168

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.0179

AC:

189

AN:

10556

Middle Eastern (MID)

AF:

0.0510

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0282

AC:

1916

AN:

67998

Other (OTH)

AF:

0.0436

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

374

749

1123

1498

1872

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

164

246

328

410

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0505

Hom.:

Bravo

AF:

0.0562

Asia WGS

AF:

0.0220

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.92

CADD

Benign

0.15

(source)

DANN

Benign

0.66

PhyloP100

-1.5

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over