rs768557500

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_022051.3(EGLN1):c.419C>T(p.Ala140Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000124 in 1,454,392 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A140S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 1 hom. )

Consequence

EGLN1
NM_022051.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: -0.00300

Publications

0 publications found

Variant links:

Genes affected

EGLN1 (HGNC:1232): (egl-9 family hypoxia inducible factor 1) The protein encoded by this gene catalyzes the post-translational formation of 4-hydroxyproline in hypoxia-inducible factor (HIF) alpha proteins. HIF is a transcriptional complex that plays a central role in mammalian oxygen homeostasis. This protein functions as a cellular oxygen sensor, and under normal oxygen concentration, modification by prolyl hydroxylation is a key regulatory event that targets HIF subunits for proteasomal destruction via the von Hippel-Lindau ubiquitylation complex. Mutations in this gene are associated with erythrocytosis familial type 3 (ECYT3). [provided by RefSeq, Nov 2009]

EGLN1 Gene-Disease associations (from GenCC):

erythrocytosis, familial, 3
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
autosomal dominant secondary polycythemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hemoglobin, high altitude adaptation
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
hereditary pheochromocytoma-paraganglioma
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

EGLN1 links:

ENSG00000287856 (HGNC:):

ENSG00000287856 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.11740473).

BP6

Variant 1-231421470-G-A is Benign according to our data. Variant chr1-231421470-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 407204.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000923 (14/151692) while in subpopulation NFE AF = 0.000192 (13/67842). AF 95% confidence interval is 0.000113. There are 0 homozygotes in GnomAd4. There are 6 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EGLN1	NM_022051.3 link	c.419C>T	p.Ala140Val	missense_variant	Exon 1 of 5	ENST00000366641.4	NP_071334.1	Q9GZT9-1R4SCQ0
EGLN1	NM_001377260.1 link	c.419C>T	p.Ala140Val	missense_variant	Exon 1 of 4		NP_001364189.1
EGLN1	NM_001377261.1 link	c.419C>T	p.Ala140Val	missense_variant	Exon 1 of 4		NP_001364190.1
EGLN1	XM_024447734.2 link	c.419C>T	p.Ala140Val	missense_variant	Exon 1 of 3		XP_024303502.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EGLN1	ENST00000366641.4 link	c.419C>T	p.Ala140Val	missense_variant	Exon 1 of 5	1	NM_022051.3	ENSP00000355601.3		Q9GZT9-1
ENSG00000287856	ENST00000662216.1 link	c.30+40968C>T		intron_variant	Intron 3 of 6			ENSP00000499467.1		A0A590UJK7

Frequencies

GnomAD3 genomes

AF:

0.0000923

AC:

AN:

151692

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.000192

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000102

AC:

AN:

59082

AF XY:

0.000197

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000103

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000246

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000128

AC:

167

AN:

1302700

Hom.:

Cov.:

AF XY:

0.000137

AC XY:

AN XY:

633954

show subpopulations

African (AFR)

AF:

0.0000362

AC:

AN:

27660

American (AMR)

AF:

0.0000951

AC:

AN:

21036

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18790

East Asian (EAS)

AF:

0.00

AC:

AN:

33724

South Asian (SAS)

AF:

0.00

AC:

AN:

63232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

43982

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4824

European-Non Finnish (NFE)

AF:

0.000153

AC:

158

AN:

1035842

Other (OTH)

AF:

0.000112

AC:

AN:

53610

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.518

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000923

AC:

AN:

151692

Hom.:

Cov.:

AF XY:

0.0000810

AC XY:

AN XY:

74082

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41368

American (AMR)

AF:

0.00

AC:

AN:

15256

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5116

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10514

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.000192

AC:

AN:

67842

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000319

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.0000362

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Erythrocytosis, familial, 3

Uncertain:1

Dec 08, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 140 of the EGLN1 protein (p.Ala140Val). This variant is present in population databases (rs768557500, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with EGLN1-related conditions. ClinVar contains an entry for this variant (Variation ID: 407204). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

not provided

Uncertain:1

Feb 23, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Oct 25, 2022

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.080

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.26

Eigen

Benign

-0.93

Eigen_PC

Benign

-0.99

FATHMM_MKL

Benign

0.13

LIST_S2

Benign

0.50

M_CAP

Pathogenic

0.58

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.72

MutationAssessor

Benign

0.55

PhyloP100

-0.0030

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-0.15

REVEL

Benign

0.094

Sift

Benign

0.50

Sift4G

Benign

0.48

Polyphen

0.33

Vest4

0.045

MVP

0.65

MPC

1.7

ClinPred

0.053

GERP RS

0.80

PromoterAI

-0.12

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.039

gMVP

0.18

Mutation Taster

=93/7

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over