NM_000799.4:c.246+21_246+24delTTTT

Variant names:

• chr7-100722057-CTTTT-C
• rs111249118
• NM_000799.4:c.246+21_246+24delTTTT

Variant summary

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

The NM_000799.4(EPO):​c.246+21_246+24delTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000034 in 1,381,958 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000028 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000035 (0 hom.)
• Consequence: EPO NM_000799.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.35
• Publications: 0 publications found

Genes affected

EPO (HGNC:3415): (erythropoietin) This gene encodes a secreted, glycosylated cytokine composed of four alpha helical bundles. The encoded protein is mainly synthesized in the kidney, secreted into the blood plasma, and binds to the erythropoietin receptor to promote red blood cell production, or erythropoiesis, in the bone marrow. Expression of this gene is upregulated under hypoxic conditions, in turn leading to increased erythropoiesis and enhanced oxygen-carrying capacity of the blood. Expression of this gene has also been observed in brain and in the eye, and elevated expression levels have been observed in diabetic retinopathy and ocular hypertension. Recombinant forms of the encoded protein exhibit neuroprotective activity against a variety of potential brain injuries, as well as antiapoptotic functions in several tissue types, and have been used in the treatment of anemia and to enhance the efficacy of cancer therapies. [provided by RefSeq, Aug 2017]

EPO Gene-Disease associations (from GenCC):

• erythrocytosis, familial, 5

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autosomal dominant secondary polycythemia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Diamond-Blackfan anemia-like

  Inheritance: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000799.4. 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
	EPO	NM_000799.4	MANE Select	c.246+21_246+24delTTTT		intron	N/A	NP_000790.2	G9JKG7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EPO	ENST00000252723.3	TSL:1 MANE Select	c.246+10_246+13delTTTT		intron	N/A	ENSP00000252723.2	P01588

Frequencies

GnomAD3 genomes AF: 0.0000284 AC: 4 AN: 140912 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.000103

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000118 AC: 13 AN: 109950 AF XY: 0.000116

Gnomad AFR exome AF: 0.000319

Gnomad AMR exome AF: 0.000158

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000456

Gnomad FIN exome AF: 0.000374

Gnomad NFE exome AF: 0.0000191

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000346 AC: 43 AN: 1241046 Hom.: 0 AF XY: 0.0000322 AC XY: 20 AN XY: 620492

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000727 AC: 2 AN: 27524

American (AMR) AF: 0.0000702 AC: 2 AN: 28472

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21516

East Asian (EAS) AF: 0.0000545 AC: 2 AN: 36714

South Asian (SAS) AF: 0.0000139 AC: 1 AN: 71798

European-Finnish (FIN) AF: 0.000249 AC: 11 AN: 44154

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4802

European-Non Finnish (NFE) AF: 0.0000241 AC: 23 AN: 954028

Other (OTH) AF: 0.0000384 AC: 2 AN: 52038

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.0000284 AC: 4 AN: 140912 Hom.: 0 Cov.: 31 AF XY: 0.0000439 AC XY: 3 AN XY: 68278

African (AFR) AF: 0.000103 AC: 4 AN: 38654

American (AMR) AF: 0.00 AC: 0 AN: 13896

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3312

East Asian (EAS) AF: 0.00 AC: 0 AN: 4952

South Asian (SAS) AF: 0.00 AC: 0 AN: 4430

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 8362

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 296

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 64218

Other (OTH) AF: 0.00 AC: 0 AN: 1902

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.4

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

Other links and lift over

dbSNP: rs111249118; hg19: chr7-100319680;