7-98881178-A-G

Position:

• chr7-98881178-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001375524.1(TRRAP):​c.28A>G​(p.Thr10Ala) 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 benign outcome for this variant. 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. T10M) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: TRRAP NM_001375524.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.14

Genes affected

TRRAP (HGNC:12347): (transformation/transcription domain associated protein) This gene encodes a large multidomain protein of the phosphoinositide 3-kinase-related kinases (PIKK) family. The encoded protein is a common component of many histone acetyltransferase (HAT) complexes and plays a role in transcription and DNA repair by recruiting HAT complexes to chromatin. Deregulation of this gene may play a role in several types of cancer including glioblastoma multiforme. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Sep 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TRRAP. . Gene score misZ 8.173 (greater than the threshold 3.09). Trascript score misZ 10.503 (greater than threshold 3.09). GenCC has associacion of gene with autosomal dominant nonsyndromic hearing loss, developmental delay with or without dysmorphic facies and autism, hearing loss, autosomal dominant 75, complex neurodevelopmental disorder with or without congenital anomalies.
• BP4: Computational evidence support a benign effect (MetaRNN=0.21152547).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRRAP	NM_001375524.1	c.28A>G	p.Thr10Ala	missense_variant	2/73	ENST00000456197.2
TRRAP	NM_001244580.2	c.28A>G	p.Thr10Ala	missense_variant	2/72
TRRAP	NM_003496.4	c.28A>G	p.Thr10Ala	missense_variant	2/71

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRRAP	ENST00000456197.2	c.28A>G	p.Thr10Ala	missense_variant	2/73	1	NM_001375524.1	P2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000936 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 11, 2023

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 10 of the TRRAP protein (p.Thr10Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TRRAP-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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	Benign	0.065
BayesDel_addAF	Uncertain	0.014	T
BayesDel_noAF	Benign	-0.22
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.094	T;T;.;.;.
Eigen	Benign	-0.063
Eigen_PC	Benign	0.20
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.89	D;D;D;D;.
M_CAP	Benign	0.0023	T
MetaRNN	Benign	0.21	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.90	.;L;L;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-1.5	N;N;N;.;N
REVEL	Benign	0.28
Sift	Benign	0.49	T;T;T;.;T
Sift4G	Pathogenic	0.0	D;T;T;T;T
Polyphen		0.24, 0.36	.;B;B;.;.
Vest4		0.52, 0.62, 0.67, 0.56
MutPred		0.15		Loss of glycosylation at T6 (P = 0.2483);Loss of glycosylation at T6 (P = 0.2483);Loss of glycosylation at T6 (P = 0.2483);Loss of glycosylation at T6 (P = 0.2483);Loss of glycosylation at T6 (P = 0.2483);
MVP		0.48
MPC		1.1
ClinPred		0.59	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.36
gMVP		0.64

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: rs1795411344; hg19: chr7-98478801;