rs772104483

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP3_ModeratePP5

The ENST00000223051.8(TFR2):c.1409G>T(p.Ser470Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,804 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: 0.0000014 ( 0 hom. )

Consequence

TFR2
ENST00000223051.8 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 3.11

Variant links:

Genes affected

TFR2 (HGNC:11762): (transferrin receptor 2) This gene encodes a single-pass type II membrane protein, which is a member of the transferrin receptor-like family. This protein mediates cellular uptake of transferrin-bound iron, and may be involved in iron metabolism, hepatocyte function and erythrocyte differentiation. Mutations in this gene have been associated with hereditary hemochromatosis type III. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, May 2011]

TFR2 links:

LOC124901709 (HGNC:):

LOC124901709 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.899

PP5

Variant 7-100628288-C-A is Pathogenic according to our data. Variant chr7-100628288-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 577309.We mark this variant Likely_pathogenic, oryginal submissions are: {Pathogenic=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
TFR2	NM_003227.4 linkuse as main transcript	c.1409G>T	p.Ser470Ile	missense_variant	11/18	ENST00000223051.8	NP_003218.2
LOC124901709	XR_007060454.1 linkuse as main transcript	n.434-2868C>A		intron_variant, non_coding_transcript_variant
TFR2	NM_001206855.3 linkuse as main transcript	c.896G>T	p.Ser299Ile	missense_variant	8/15		NP_001193784.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TFR2	ENST00000223051.8 linkuse as main transcript	c.1409G>T	p.Ser470Ile	missense_variant	11/18	1	NM_003227.4	ENSP00000223051	P1	Q9UP52-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

251076

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135774

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461804

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727198

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary hemochromatosis

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 21, 2019

This sequence change replaces serine with isoleucine at codon 470 of the TFR2 protein (p.Ser470Ile). The serine residue is highly conserved and there is a large physicochemical difference between serine and isoleucine. This variant is present in population databases (rs772104483, ExAC 0.009%). This variant has been reported as homozygous in an individual affected with hereditary hemochromatosis (Invitae). 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 disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. For these reasons, this variant has been classified as Pathogenic. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

May 15, 2024

Variant summary: TFR2 c.1409G>T (p.Ser470Ile) results in a non-conservative amino acid change located in the Peptidase M28 (IPR007484) of 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 8e-06 in 251076 control chromosomes. c.1409G>T has been reported in the literature in the homozygous state in at least 1 individual affected with Hemochromatosis Type 3 (example, Khayat_2019). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 29985876). ClinVar contains an entry for this variant (Variation ID: 577309). 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

0.98

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.44

T;T

Eigen

Pathogenic

0.75

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.87

D;.

M_CAP

Uncertain

0.089

MetaRNN

Pathogenic

0.90

D;D

MetaSVM

Uncertain

-0.060

MutationAssessor

Pathogenic

3.4

M;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.64

PROVEAN

Pathogenic

-5.3

D;D

REVEL

Pathogenic

0.65

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.96

MutPred

0.69

Loss of disorder (P = 0.0272);Loss of disorder (P = 0.0272);

MVP

0.77

MPC

1.2

ClinPred

0.99

GERP RS

4.8

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.6

Varity_R

0.95

gMVP

0.95

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