rs558462037

chr19-33302231-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM1

The NM_004364.5(CEBPA):c.184A>G(p.Ile62Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000501 in 1,495,708 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. I62M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000055 (0 hom.)
• Consequence: CEBPA NM_004364.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.56

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a mutagenesis_site Decreased interaction with TRIB1. (size 0) in uniprot entity CEBPA_HUMAN

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CEBPA	NM_004364.5	c.184A>G	p.Ile62Val	missense_variant	1/1	ENST00000498907.3
CEBPA	NM_001287424.2	c.289A>G	p.Ile97Val	missense_variant	1/1
CEBPA	NM_001287435.2	c.142A>G	p.Ile48Val	missense_variant	1/1
CEBPA	NM_001285829.2	c.-174A>G		5_prime_UTR_variant	1/1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CEBPA	ENST00000498907.3	c.184A>G	p.Ile62Val	missense_variant	1/1		NM_004364.5	P1

Frequencies

GnomAD3 genomes AF: 0.00000660 AC: 1 AN: 151488 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000196

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000551 AC: 74 AN: 1344108 Hom.: 0 Cov.: 33 AF XY: 0.0000483 AC XY: 32 AN XY: 662872

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00248

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000660 AC: 1 AN: 151600 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74082

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000197

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Acute myeloid leukemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 22, 2024

This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 62 of the CEBPA protein (p.Ile62Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CEBPA-related conditions. ClinVar contains an entry for this variant (Variation ID: 578986). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CEBPA protein function with a negative predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.63
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.43	T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.78	T
M_CAP	Pathogenic	0.75	D
MetaRNN	Uncertain	0.45	T
MetaSVM	Benign	-0.87	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	0.98	D
PrimateAI	Pathogenic	0.97	D
PROVEAN	Benign	-0.52	N
REVEL	Benign	0.17
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.098	T
Polyphen		0.98	D
Vest4		0.40
MutPred		0.29		Gain of sheet (P = 0.1208);
MVP		0.23
ClinPred		0.94	D
GERP RS		4.0
Varity_R		0.46
gMVP		0.38

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

LitVar

Other links and lift over

dbSNP: rs558462037; hg19: chr19-33793137;