rs1555910821

Variant names:

• chr22-41166649-A-G
• rs1555910821
• NM_001429.4:c.3857A>G

Your query was ambiguous. Multiple possible variants found:

• chr22-41166649-A-G
• chr22-41166649-A-T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PM2 PP3_Moderate PP5_Very_Strong

The NM_001429.4(EP300):​c.3857A>G​(p.Asn1286Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EP300 NM_001429.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9
• Conservation: PhyloP100: 9.08
• Publications: 1 publications found

Genes affected

EP300 (HGNC:3373): (E1A binding protein p300) This gene encodes the adenovirus E1A-associated cellular p300 transcriptional co-activator protein. It functions as histone acetyltransferase that regulates transcription via chromatin remodeling and is important in the processes of cell proliferation and differentiation. It mediates cAMP-gene regulation by binding specifically to phosphorylated CREB protein. This gene has also been identified as a co-activator of HIF1A (hypoxia-inducible factor 1 alpha), and thus plays a role in the stimulation of hypoxia-induced genes such as VEGF. Defects in this gene are a cause of Rubinstein-Taybi syndrome and may also play a role in epithelial cancer. [provided by RefSeq, Jul 2008]

EP300-AS1 (HGNC:50504): (EP300 antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 22-41166649-A-G is Pathogenic according to our data. Variant chr22-41166649-A-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 378053.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EP300	NM_001429.4	c.3857A>G	p.Asn1286Ser	missense_variant	Exon 23 of 31	ENST00000263253.9	NP_001420.2
EP300	NM_001362843.2	c.3779A>G	p.Asn1260Ser	missense_variant	Exon 22 of 30		NP_001349772.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EP300	ENST00000263253.9	c.3857A>G	p.Asn1286Ser	missense_variant	Exon 23 of 31	1	NM_001429.4	ENSP00000263253.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:9

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Rubinstein-Taybi syndrome due to EP300 haploinsufficiency Pathogenic:5

Aug 30, 2021

CENTOGENE GmbH and LLC - Guiding Precision Medicine

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 29, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces asparagine with serine at codon 1286 of the EP300 protein (p.Asn1286Ser). The asparagine residue is highly conserved and there is a small physicochemical difference between asparagine and serine. This variant is not present in population databases (ExAC no frequency). This variant has been observed in individual(s) with Rubinstein–Taybi syndrome (PMID: 27648933, 27465822). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 378053). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. For these reasons, this variant has been classified as Pathogenic. -

Feb 26, 2019

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

May 22, 2022

3billion

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is not observed in the gnomAD v2.1.1 dataset. In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.61; 3Cnet: 0.39). Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000378053). The variant has been observed in at least two similarly affected unrelated individuals (PMID: 27465822, 32827181, 33644862). The variant has been previously reported as assumed (i.e. paternity and maternity not confirmed) de novo in at least one similarly affected unrelated individual (PMID: 27648933). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -

Nov 05, 2019

Wessex Regional Genetics Laboratory, Salisbury District Hospital

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

See cases Pathogenic:1

Sep 03, 2021

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACMG classification criteria: PS4, PM2, PM6 -

EP300-related disorder Pathogenic:1

Aug 20, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The EP300 c.3857A>G variant is predicted to result in the amino acid substitution p.Asn1286Ser. This variant has been reported in multiple individuals with Rubinstein-Taybi syndrome and neurodevelopmental disorders; in most of these individuals, this variant was found to have arise de novo (Fergelot et al 2016. PubMed ID: 27648933; Hamilton MJ et al 2016. PubMed ID: 27465822; Table_S2, Turner TN et al 2019. PubMed ID: 31785789; Cross E et al 2020. PubMed ID: 32827181; Hiraide T et al 2021. PubMed ID: 33644862; Hamilton MJ et al 2016. PubMed ID: 27465822). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. This variant is interpreted as pathogenic. -

not provided Pathogenic:1

Apr 06, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 27465822, 32827181, 27648933, 33644862, 31785789) -

Intellectual disability Pathogenic:1

Sep 10, 2020

Diagnostic Laboratory, Strasbourg University Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Uncertain	0.052	T
BayesDel_noAF	Benign	-0.16
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D
Eigen	Pathogenic	0.78
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.89	D
MetaSVM	Uncertain	0.49	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		9.1
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-4.9	D
REVEL	Uncertain	0.61
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.40		Gain of phosphorylation at N1286 (P = 0.0117);
MVP		0.89
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.42
gMVP		0.52
Mutation Taster		=12/88	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.92		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.92		Position offset: -1
DS_DL_spliceai		0.40		Position offset: 17

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1555910821; hg19: chr22-41562653; COSMIC: COSV54328401; COSMIC: COSV54328401;