19-33301502-G-C

Variant names:

• chr19-33301502-G-C
• rs747606716
• NM_004364.5:c.913C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4 BP6

The NM_004364.5(CEBPA):​c.913C>G​(p.Gln305Glu) variant causes a missense 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. 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. Q305K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CEBPA NM_004364.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 2.08
• Publications: 0 publications found

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)

ENSG00000267727 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 18 uncertain in NM_004364.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.37456185).
• BP6: Variant 19-33301502-G-C is Benign according to our data. Variant chr19-33301502-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 566890.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004364.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEBPA	NM_004364.5	MANE Select	c.913C>G	p.Gln305Glu	missense	Exon 1 of 1	NP_004355.2
	CEBPA	NM_001287424.2		c.1018C>G	p.Gln340Glu	missense	Exon 1 of 1	NP_001274353.1
	CEBPA	NM_001287435.2		c.871C>G	p.Gln291Glu	missense	Exon 1 of 1	NP_001274364.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEBPA	ENST00000498907.3	TSL:6 MANE Select	c.913C>G	p.Gln305Glu	missense	Exon 1 of 1	ENSP00000427514.1
	ENSG00000267727	ENST00000587312.1	TSL:3	n.224G>C		non_coding_transcript_exon	Exon 1 of 2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Acute myeloid leukemia Uncertain:1

Jun 26, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamine with glutamic acid at codon 305 of the CEBPA protein (p.Gln305Glu). The glutamine residue is moderately conserved and there is a small physicochemical difference between glutamine and glutamic acid. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with CEBPA-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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.

Inborn genetic diseases Benign:1

Aug 13, 2025

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 v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.55
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.50
CADD	Pathogenic	30
DANN	Uncertain	0.98
DEOGEN2	Benign	0.39	T
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.029	D
MetaRNN	Benign	0.37	T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	1.7	L
PhyloP100		2.1
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.078
Sift	Benign	0.22	T
Sift4G	Benign	0.18	T
Polyphen		0.95	P
Vest4		0.29
MutPred		0.39		Loss of MoRF binding (P = 0.0696)
MVP		0.52
ClinPred		0.54	D
GERP RS		4.7
Varity_R		0.35
gMVP		0.80
Mutation Taster		=89/11	polymorphism

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: rs747606716; hg19: chr19-33792408;