chr19-33302159-G-C

Variant names:

• chr19-33302159-G-C
• rs1555742243
• NM_004364.5:c.256C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004364.5(CEBPA):​c.256C>G​(p.Arg86Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000779 in 1,284,248 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R86Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.8e-7 (0 hom.)
• Consequence: CEBPA NM_004364.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.03
• 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-DT (HGNC:25710): (CEBPA divergent transcript)

ENSG00000267727 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17126566).

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.256C>G	p.Arg86Gly	missense	Exon 1 of 1	NP_004355.2
	CEBPA	NM_001287424.2		c.361C>G	p.Arg121Gly	missense	Exon 1 of 1	NP_001274353.1	P49715-4
	CEBPA	NM_001287435.2		c.214C>G	p.Arg72Gly	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.256C>G	p.Arg86Gly	missense	Exon 1 of 1	ENSP00000427514.1	P49715-1
	CEBPA-DT	ENST00000718467.1		n.46+360G>C		intron	N/A
	ENSG00000267727	ENST00000587312.1	TSL:3	n.*219G>C		downstream_gene	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.79e-7 AC: 1 AN: 1284248 Hom.: 0 Cov.: 33 AF XY: 0.00000158 AC XY: 1 AN XY: 631962

⚠️ 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: 26496

American (AMR) AF: 0.00 AC: 0 AN: 25256

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21906

East Asian (EAS) AF: 0.00 AC: 0 AN: 27530

South Asian (SAS) AF: 0.00 AC: 0 AN: 64052

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 44834

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5172

European-Non Finnish (NFE) AF: 9.83e-7 AC: 1 AN: 1017140

Other (OTH) AF: 0.00 AC: 0 AN: 51862

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	22
DANN	Benign	0.97
DEOGEN2	Benign	0.29	T
Eigen	Benign	-0.48
Eigen_PC	Benign	-0.29
FATHMM_MKL	Benign	0.72	D
LIST_S2	Benign	0.78	T
M_CAP	Pathogenic	0.90	D
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N
PhyloP100		1.0
PrimateAI	Pathogenic	0.93	D
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.045
Sift	Benign	0.13	T
Sift4G	Benign	0.46	T
Polyphen		0.0020	B
Vest4		0.12
MutPred		0.38		Loss of helix (P = 0.0167)
MVP		0.35
ClinPred		0.24	T
GERP RS		3.0
PromoterAI		-0.049	Neutral
Varity_R		0.16
gMVP		0.20
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: rs1555742243; hg19: chr19-33793065;