19-33301358-C-T

Variant names:

• chr19-33301358-C-T
• rs1317158199
• NM_004364.5:c.1057G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_004364.5(CEBPA):​c.1057G>A​(p.Ala353Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,450,578 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 Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A353A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CEBPA NM_004364.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.38
• Publications: 1 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 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 17 uncertain in NM_004364.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18287405).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEBPA	NM_004364.5	MANE Select	c.1057G>A	p.Ala353Thr	missense	Exon 1 of 1	NP_004355.2
	CEBPA	NM_001287424.2		c.1162G>A	p.Ala388Thr	missense	Exon 1 of 1	NP_001274353.1	P49715-4
	CEBPA	NM_001287435.2		c.1015G>A	p.Ala339Thr	missense	Exon 1 of 1	NP_001274364.1	P49715-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CEBPA	ENST00000498907.3	TSL:6 MANE Select	c.1057G>A	p.Ala353Thr	missense	Exon 1 of 1	ENSP00000427514.1	P49715-1
	ENSG00000267727	ENST00000587312.1	TSL:3	n.80C>T		non_coding_transcript_exon	Exon 1 of 2
	ENSG00000267580	ENST00000589932.1	TSL:2	n.*190C>T		downstream_gene	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000426 AC: 1 AN: 234598 AF XY: 0.00

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: 0.0000618

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1450578 Hom.: 0 Cov.: 31 AF XY: 0.00000139 AC XY: 1 AN XY: 721820

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

African (AFR) AF: 0.00 AC: 0 AN: 33374

American (AMR) AF: 0.00 AC: 0 AN: 44164

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26018

East Asian (EAS) AF: 0.00 AC: 0 AN: 39478

South Asian (SAS) AF: 0.0000117 AC: 1 AN: 85750

European-Finnish (FIN) AF: 0.0000220 AC: 1 AN: 45462

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1110388

Other (OTH) AF: 0.00 AC: 0 AN: 60182

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0662318), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Acute myeloid leukemia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.47
BayesDel_addAF	Benign	-0.080	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.34	T
Eigen	Benign	-0.028
Eigen_PC	Benign	0.12
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.5	L
PhyloP100		3.4
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.080
Sift	Uncertain	0.025	D
Sift4G	Uncertain	0.037	D
Polyphen		0.32	B
Vest4		0.29
MutPred		0.15		Loss of ubiquitination at K352 (P = 0.0589)
MVP		0.36
ClinPred		0.75	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.26
gMVP		0.76
Mutation Taster		=79/21	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: rs1317158199; hg19: chr19-33792264;