NM_005957.5:c.1667C>T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_005957.5(MTHFR):c.1667C>T(p.Pro556Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,856 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 Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P556P) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

MTHFR
NM_005957.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 9.31

Publications

1 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: G2P, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

MTHFR links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.811

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005957.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MTHFR	NM_005957.5	MANE Select	c.1667C>T	p.Pro556Leu	missense	Exon 11 of 12	NP_005948.3
MTHFR	NM_001330358.2		c.1790C>T	p.Pro597Leu	missense	Exon 11 of 12	NP_001317287.1	P42898-2
MTHFR	NM_001410750.1		c.1787C>T	p.Pro596Leu	missense	Exon 11 of 12	NP_001397679.1	Q5SNW7

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MTHFR	ENST00000376590.9	TSL:1 MANE Select	c.1667C>T	p.Pro556Leu	missense	Exon 11 of 12	ENSP00000365775.3	P42898-1
MTHFR	ENST00000423400.7	TSL:1	c.1787C>T	p.Pro596Leu	missense	Exon 11 of 12	ENSP00000398908.3	Q5SNW7
MTHFR	ENST00000376592.6	TSL:1	c.1667C>T	p.Pro556Leu	missense	Exon 11 of 12	ENSP00000365777.1	P42898-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

251378

AF XY:

0.0000221

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461856

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727228

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111988

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Homocystinuria due to methylene tetrahydrofolate reductase deficiency (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.83

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.22

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.72

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.97

M_CAP

Benign

0.063

MetaRNN

Pathogenic

0.81

MetaSVM

Uncertain

-0.15

MutationAssessor

Pathogenic

3.2

PhyloP100

9.3

PrimateAI

Uncertain

0.74

PROVEAN

Pathogenic

-6.3

REVEL

Uncertain

0.54

Sift

Benign

0.14

Sift4G

Benign

0.13

Polyphen

0.60

Vest4

0.90

MutPred

0.50

Loss of disorder (P = 0.0549)

MVP

0.85

MPC

0.83

ClinPred

0.93

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.62

gMVP

0.81

Mutation Taster

=8/92

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over