19-33301415-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_004364.5(CEBPA):c.1000G>A(p.Glu334Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,459,300 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 Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E334Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CEBPA
NM_004364.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:2

Conservation

PhyloP100: 6.14

Publications

4 publications found

Variant links:

Genes affected

CEBPA (HGNC:1833): (CCAAT enhancer binding protein alpha) This intronless gene encodes a transcription factor that contains a basic leucine zipper (bZIP) domain and recognizes the CCAAT motif in the promoters of target genes. The encoded protein functions in homodimers and also heterodimers with CCAAT/enhancer-binding proteins beta and gamma. Activity of this protein can modulate the expression of genes involved in cell cycle regulation as well as in body weight homeostasis. Mutation of this gene is associated with acute myeloid leukemia. The use of alternative in-frame non-AUG (GUG) and AUG start codons results in protein isoforms with different lengths. Differential translation initiation is mediated by an out-of-frame, upstream open reading frame which is located between the GUG and the first AUG start codons. [provided by RefSeq, Dec 2013]

CEBPA Gene-Disease associations (from GenCC):

acute myeloid leukemia
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Genomics England PanelApp, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)

CEBPA links:

ENSG00000267727 (HGNC:):

ENSG00000267727 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.88

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CEBPA	NM_004364.5 link	c.1000G>A	p.Glu334Lys	missense_variant	Exon 1 of 1	ENST00000498907.3	NP_004355.2
CEBPA	NM_001287424.2 link	c.1105G>A	p.Glu369Lys	missense_variant	Exon 1 of 1		NP_001274353.1
CEBPA	NM_001287435.2 link	c.958G>A	p.Glu320Lys	missense_variant	Exon 1 of 1		NP_001274364.1
CEBPA	NM_001285829.2 link	c.643G>A	p.Glu215Lys	missense_variant	Exon 1 of 1		NP_001272758.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
CEBPA	ENST00000498907.3 link	c.1000G>A	p.Glu334Lys	missense_variant	Exon 1 of 1	6	NM_004364.5	ENSP00000427514.1
ENSG00000267727	ENST00000587312.1 link	n.137C>T		non_coding_transcript_exon_variant	Exon 1 of 2	3
ENSG00000267580	ENST00000589932.1 link	n.*247C>T		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000406

AC:

AN:

246288

AF XY:

0.00000746

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1459300

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726098

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26110

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51288

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111708

Other (OTH)

AF:

0.00

AC:

AN:

60342

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.600

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Acute myeloid leukemia

Pathogenic:1Uncertain:1

Department of Zoology, Division of Science and Technology, University of Education

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 26, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. 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. ClinVar contains an entry for this variant (Variation ID: 580178). This variant has not been reported in the literature in individuals affected with CEBPA-related conditions. This variant is present in population databases (rs369632687, gnomAD 0.003%). This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 334 of the CEBPA protein (p.Glu334Lys). -

Inborn genetic diseases

Uncertain:1

Mar 18, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.E334K variant (also known as c.1000G>A), located in coding exon 1 of the CEBPA gene, results from a G to A substitution at nucleotide position 1000. The glutamic acid at codon 334 is replaced by lysine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

0.10

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.84

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.043

MetaRNN

Pathogenic

0.88

MetaSVM

Uncertain

0.047

MutationAssessor

Pathogenic

3.8

PhyloP100

6.1

PrimateAI

Pathogenic

0.89

PROVEAN

Uncertain

-3.9

REVEL

Uncertain

0.54

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0060

Polyphen

1.0

Vest4

0.88

MutPred

0.69

Gain of MoRF binding (P = 0.0138);

MVP

0.70

ClinPred

1.0

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.76

gMVP

0.99

Mutation Taster

=47/53

disease causing

(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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over