16-3728723-G-T

Variant names:

• chr16-3728723-G-T
• rs199821421
• NM_004380.3:c.6324C>A

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_004380.3(CREBBP):​c.6324C>A​(p.Tyr2108*) variant causes a stop gained change involving the alteration of a non-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 (★★). Synonymous variant affecting the same amino acid position (i.e. Y2108Y) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CREBBP NM_004380.3 stop_gained
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 0.215
• Publications: 4 publications found

Genes affected

CREBBP (HGNC:2348): (CREB binding protein) This gene is ubiquitously expressed and is involved in the transcriptional coactivation of many different transcription factors. First isolated as a nuclear protein that binds to cAMP-response element binding protein (CREB), this gene is now known to play critical roles in embryonic development, growth control, and homeostasis by coupling chromatin remodeling to transcription factor recognition. The protein encoded by this gene has intrinsic histone acetyltransferase activity and also acts as a scaffold to stabilize additional protein interactions with the transcription complex. This protein acetylates both histone and non-histone proteins. This protein shares regions of very high sequence similarity with protein p300 in its bromodomain, cysteine-histidine-rich regions, and histone acetyltransferase domain. Mutations in this gene cause Rubinstein-Taybi syndrome (RTS). Chromosomal translocations involving this gene have been associated with acute myeloid leukemia. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Feb 2009]

CREBBP Gene-Disease associations (from GenCC):

• Rubinstein-Taybi syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen, Illumina
• Rubinstein-Taybi syndrome due to CREBBP mutations

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• Menke-Hennekam syndrome 1

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 14 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 11 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 16-3728723-G-T is Pathogenic according to our data. Variant chr16-3728723-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 431483.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004380.3. 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
	CREBBP	NM_004380.3	MANE Select	c.6324C>A	p.Tyr2108*	stop_gained	Exon 31 of 31	NP_004371.2
	CREBBP	NM_001079846.1		c.6210C>A	p.Tyr2070*	stop_gained	Exon 30 of 30	NP_001073315.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CREBBP	ENST00000262367.10	TSL:1 MANE Select	c.6324C>A	p.Tyr2108*	stop_gained	Exon 31 of 31	ENSP00000262367.5
	CREBBP	ENST00000382070.7	TSL:1	c.6210C>A	p.Tyr2070*	stop_gained	Exon 30 of 30	ENSP00000371502.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Oct 06, 2015

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Rubinstein-Taybi syndrome due to CREBBP mutations Pathogenic:1

Jul 13, 2017

HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	35
DANN	Uncertain	1.0
Eigen	Uncertain	0.23
Eigen_PC	Benign	0.023
FATHMM_MKL	Uncertain	0.86	D
PhyloP100		0.21
Vest4		0.97
GERP RS		-1.2
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs199821421; hg19: chr16-3778724;