11-72192195-C-A

Position:

chr11-72192195-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_016729.3(FOLR1):c.22C>A(p.Gln8Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000144 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

FOLR1
NM_016729.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.109

Variant links:

Genes affected

FOLR1 (HGNC:3791): (folate receptor alpha) The protein encoded by this gene is a member of the folate receptor family. Members of this gene family bind folic acid and its reduced derivatives, and transport 5-methyltetrahydrofolate into cells. This gene product is a secreted protein that either anchors to membranes via a glycosyl-phosphatidylinositol linkage or exists in a soluble form. Mutations in this gene have been associated with neurodegeneration due to cerebral folate transport deficiency. Due to the presence of two promoters, multiple transcription start sites, and alternative splicing, multiple transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Oct 2009]

FOLR1 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.18341455).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
FOLR1	NM_016729.3 linkuse as main transcript	c.22C>A	p.Gln8Lys	missense_variant	1/4	ENST00000393676.5	NP_057941.1
FOLR1	NM_000802.3 linkuse as main transcript	c.22C>A	p.Gln8Lys	missense_variant	2/5		NP_000793.1
FOLR1	NM_016724.3 linkuse as main transcript	c.22C>A	p.Gln8Lys	missense_variant	3/6		NP_057936.1
FOLR1	NM_016725.3 linkuse as main transcript	c.22C>A	p.Gln8Lys	missense_variant	2/5		NP_057937.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FOLR1	ENST00000393676.5 linkuse as main transcript	c.22C>A	p.Gln8Lys	missense_variant	1/4	1	NM_016729.3	ENSP00000377281	P1
	ENST00000378140.3 linkuse as main transcript	n.419+6318G>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251390

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135864

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:

0.000229

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.0000165

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:

0.000174

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000312

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 23, 2019

The p.Q8K variant (also known as c.22C>A), located in coding exon 1 of the FOLR1 gene, results from a C to A substitution at nucleotide position 22. The glutamine at codon 8 is replaced by lysine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Jan 01, 2023

FOLR1: PM2, BP4 -

Cerebral folate transport deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 19, 2022

This sequence change replaces glutamine, which is neutral and polar, with lysine, which is basic and polar, at codon 8 of the FOLR1 protein (p.Gln8Lys). This variant is present in population databases (rs770851094, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with FOLR1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.30

T;T;T;T

Eigen

Benign

-0.99

Eigen_PC

Benign

-0.97

FATHMM_MKL

Benign

0.091

LIST_S2

Benign

0.68

.;.;.;T

M_CAP

Benign

0.026

MetaRNN

Benign

0.18

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.1

L;L;L;L

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.37

N;N;N;N

REVEL

Benign

0.12

Sift

Benign

0.17

T;T;T;T

Sift4G

Benign

1.0

T;T;T;T

Polyphen

0.035

B;B;B;B

Vest4

0.26

MutPred

0.74

Gain of ubiquitination at Q8 (P = 0.023);Gain of ubiquitination at Q8 (P = 0.023);Gain of ubiquitination at Q8 (P = 0.023);Gain of ubiquitination at Q8 (P = 0.023);

MVP

0.52

MPC

0.56

ClinPred

0.023

GERP RS

1.5

Varity_R

0.099

gMVP

0.69

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