Genetic Variant MTHFR:c.587-1332C>T (chr1-11797731-G-A) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBA1

The NM_005957.5(MTHFR):c.587-1332C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.127 in 152,206 control chromosomes in the GnomAD database, including 1,487 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.13 ( 1487 hom., cov: 32)

Consequence

MTHFR
NM_005957.5 intron

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.216

Publications

41 publications found

Variant links:

Genes affected

MTHFR (HGNC:7436): (methylenetetrahydrofolate reductase) The protein encoded by this gene catalyzes the conversion of 5,10-methylenetetrahydrofolate to 5-methyltetrahydrofolate, a co-substrate for homocysteine remethylation to methionine. Genetic variation in this gene influences susceptibility to occlusive vascular disease, neural tube defects, colon cancer and acute leukemia, and mutations in this gene are associated with methylenetetrahydrofolate reductase deficiency.[provided by RefSeq, Oct 2009]

MTHFR Gene-Disease associations (from GenCC):

homocystinuria due to methylene tetrahydrofolate reductase deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet

MTHFR links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 1-11797731-G-A is Benign according to our data. Variant chr1-11797731-G-A is described in ClinVar as Benign. ClinVar VariationId is 1168301.Status of the report is criteria_provided_single_submitter, 1 stars.

BA1

GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.197 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTHFR	NM_005957.5 link	c.587-1332C>T		intron_variant	Intron 4 of 11	ENST00000376590.9	NP_005948.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTHFR	ENST00000376590.9 link	c.587-1332C>T		intron_variant	Intron 4 of 11	1	NM_005957.5	ENSP00000365775.3

Frequencies

GnomAD3 genomes

AF:

0.127

AC:

19367

AN:

152088

Hom.:

1489

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0439

Gnomad AMI

AF:

0.200

Gnomad AMR

AF:

0.103

Gnomad ASJ

AF:

0.209

Gnomad EAS

AF:

0.0980

Gnomad SAS

AF:

0.206

Gnomad FIN

AF:

0.169

Gnomad MID

AF:

0.253

Gnomad NFE

AF:

0.167

Gnomad OTH

AF:

0.148

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

GnomAD4 genome

AF:

0.127

AC:

19365

AN:

152206

Hom.:

1487

Cov.:

AF XY:

0.128

AC XY:

9515

AN XY:

74410

show subpopulations

African (AFR)

AF:

0.0439

AC:

1824

AN:

41548

American (AMR)

AF:

0.103

AC:

1571

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.209

AC:

725

AN:

3472

East Asian (EAS)

AF:

0.0980

AC:

508

AN:

5184

South Asian (SAS)

AF:

0.207

AC:

1001

AN:

4832

European-Finnish (FIN)

AF:

0.169

AC:

1790

AN:

10576

Middle Eastern (MID)

AF:

0.235

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.167

AC:

11383

AN:

68002

Other (OTH)

AF:

0.148

AC:

312

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

875

1749

2624

3498

4373

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

232

464

696

928

1160

<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:

0.156

Hom.:

2951

Bravo

AF:

0.118

Asia WGS

AF:

0.152

AC:

530

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Homocystinuria due to methylene tetrahydrofolate reductase deficiency

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

4.3

(source)

DANN

Benign

0.60

PhyloP100

0.22

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over