rs786204011

Positions:

chr1-11801257-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PP3_StrongPP5

The NM_005957.5(MTHFR):c.379C>T(p.His127Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

MTHFR
NM_005957.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:1

Conservation

PhyloP100: 9.20

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PM1

In a binding_site (size 0) in uniprot entity MTHR_HUMAN

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.99

PP5

Variant 1-11801257-G-A is Pathogenic according to our data. Variant chr1-11801257-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 187873.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MTHFR	NM_005957.5 linkuse as main transcript	c.379C>T	p.His127Tyr	missense_variant	3/12	ENST00000376590.9	NP_005948.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTHFR	ENST00000376590.9 linkuse as main transcript	c.379C>T	p.His127Tyr	missense_variant	3/12	1	NM_005957.5	ENSP00000365775	A1	P42898-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251448

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727244

show subpopulations

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:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Homocystinuria due to methylene tetrahydrofolate reductase deficiency

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Genomic Research Center, Shahid Beheshti University of Medical Sciences	May 03, 2020	- -
Pathogenic, no assertion criteria provided	clinical testing	University Children's Hospital, University of Zurich	-	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jul 20, 2023

Variant summary: MTHFR c.379C>T (p.His127Tyr) results in a conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 251448 control chromosomes. c.379C>T has been reported in the literature in homozygous and compound heterozygous individuals affected with MTHFR deficiency (e.g. Mercimek-Mahmutoglu_2015, Burda_2015). These data indicate that the variant may be associated with disease. One publication reports experimental evidence evaluating an impact on protein function, however, does not allow convincing conclusions about the variant effect (e.g. Weile_2021). The following publications have been ascertained in the context of this evaluation (PMID: 25736335, 25758715, 34214447). One submitter has cited clinical-significance assessments for this variant to ClinVar after 2014 and has classified the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.93

BayesDel_addAF

Pathogenic

0.56

BayesDel_noAF

Pathogenic

0.57

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.98

D;.;.;D;.;.;.;.

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.98

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.97

.;D;.;D;D;D;D;D

M_CAP

Pathogenic

0.64

MetaRNN

Pathogenic

0.99

D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.1

H;.;.;H;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.78

PROVEAN

Pathogenic

-5.9

D;D;D;D;.;.;.;D

REVEL

Pathogenic

0.97

Sift

Pathogenic

0.0

D;D;D;D;.;.;.;D

Sift4G

Pathogenic

0.0

D;D;D;D;.;.;.;.

Polyphen

1.0

D;.;.;D;.;.;.;.

Vest4

0.97

MutPred

0.92

Loss of catalytic residue at L126 (P = 0.2509);.;.;Loss of catalytic residue at L126 (P = 0.2509);.;Loss of catalytic residue at L126 (P = 0.2509);Loss of catalytic residue at L126 (P = 0.2509);Loss of catalytic residue at L126 (P = 0.2509);

MVP

0.99

MPC

1.0

ClinPred

1.0

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.98

gMVP

0.98

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

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