chr7-100627408-G-T

Variant names:

• chr7-100627408-G-T
• rs2075674
• NM_003227.4:c.1851C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_003227.4(TFR2):​c.1851C>A​(p.Ala617Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A617A) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TFR2 NM_003227.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.56
• Publications: 34 publications found

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 Gene-Disease associations (from GenCC):

• hemochromatosis type 3

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, PanelApp Australia

LOC124901709 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP7: Synonymous conserved (PhyloP=-1.56 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003227.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TFR2	NM_003227.4	MANE Select	c.1851C>A	p.Ala617Ala	synonymous	Exon 16 of 18	NP_003218.2
	TFR2	NM_001206855.3		c.1338C>A	p.Ala446Ala	synonymous	Exon 13 of 15	NP_001193784.1	Q9UP52-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TFR2	ENST00000223051.8	TSL:1 MANE Select	c.1851C>A	p.Ala617Ala	synonymous	Exon 16 of 18	ENSP00000223051.3	Q9UP52-1
	TFR2	ENST00000855275.1		c.1947C>A	p.Ala649Ala	synonymous	Exon 18 of 20	ENSP00000525334.1
	TFR2	ENST00000855257.1		c.1851C>A	p.Ala617Ala	synonymous	Exon 17 of 20	ENSP00000525316.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 59

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 3999

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	0.68
DANN	Benign	0.81
PhyloP100		-1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs2075674; hg19: chr7-100225031;