Genetic Variant CEBPA:p.Ala9Ala (chr19-33302388-C-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_ModerateBP6_ModerateBP7

The NM_004364.5(CEBPA):c.27G>A(p.Ala9Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000174 in 1,149,216 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. A9A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000017 ( 0 hom. )

Consequence

CEBPA
NM_004364.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.01

Publications

0 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 links:

CEBPA-DT (HGNC:25710): (CEBPA divergent transcript)

CEBPA-DT links:

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ACMG classification

Classification was made for transcript

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=-0.25).

BP6

Variant 19-33302388-C-T is Benign according to our data. Variant chr19-33302388-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 456676.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=1.01 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CEBPA	NM_004364.5 link	c.27G>A	p.Ala9Ala	synonymous_variant	Exon 1 of 1	ENST00000498907.3	NP_004355.2
CEBPA	NM_001287424.2 link	c.132G>A	p.Ala44Ala	synonymous_variant	Exon 1 of 1		NP_001274353.1
CEBPA	NM_001287435.2 link	c.-16G>A		5_prime_UTR_variant	Exon 1 of 1		NP_001274364.1
CEBPA	NM_001285829.2 link	c.-331G>A		5_prime_UTR_variant	Exon 1 of 1		NP_001272758.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CEBPA	ENST00000498907.3 link	c.27G>A	p.Ala9Ala	synonymous_variant	Exon 1 of 1	6	NM_004364.5	ENSP00000427514.1
CEBPA-DT	ENST00000718467.1 link	n.46+589C>T		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000174

AC:

AN:

1149216

Hom.:

Cov.:

AF XY:

0.00000362

AC XY:

AN XY:

552444

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

23022

American (AMR)

AF:

0.00

AC:

AN:

8420

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

14896

East Asian (EAS)

AF:

0.00

AC:

AN:

26714

South Asian (SAS)

AF:

0.00

AC:

AN:

33898

European-Finnish (FIN)

AF:

0.00

AC:

AN:

36360

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4092

European-Non Finnish (NFE)

AF:

0.00000209

AC:

AN:

955822

Other (OTH)

AF:

0.00

AC:

AN:

45992

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

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.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Acute myeloid leukemia

Benign:1

Mar 01, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Benign

0.95

PhyloP100

1.0

PromoterAI

0.038

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

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