3-177038114-T-C

Position:

• chr3-177038114-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Moderate

The NM_024665.7(TBL1XR1):​c.1106A>G​(p.Asp369Gly) 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 (★). Synonymous variant affecting the same amino acid position (i.e. D369D) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TBL1XR1 NM_024665.7 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.94

Genes affected

TBL1XR1 (HGNC:29529): (TBL1X/Y related 1) This gene is a member of the WD40 repeat-containing gene family and shares sequence similarity with transducin (beta)-like 1X-linked (TBL1X). The protein encoded by this gene is thought to be a component of both nuclear receptor corepressor (N-CoR) and histone deacetylase 3 (HDAC 3) complexes, and is required for transcriptional activation by a variety of transcription factors. Mutations in these gene have been associated with some autism spectrum disorders, and one finding suggests that haploinsufficiency of this gene may be a cause of intellectual disability with dysmorphism. Mutations in this gene as well as recurrent translocations involving this gene have also been observed in some tumors. [provided by RefSeq, Mar 2016]

TBL1XR1-AS1 (HGNC:41243): (TBL1XR1 antisense RNA 1)

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_024665.7
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TBL1XR1. . Gene score misZ 4.2042 (greater than the threshold 3.09). Trascript score misZ 5.2877 (greater than threshold 3.09). GenCC has associacion of gene with Pierpont syndrome, complex neurodevelopmental disorder, intellectual disability, autosomal dominant 41.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.898
• PP5: Variant 3-177038114-T-C is Pathogenic according to our data. Variant chr3-177038114-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2627906.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBL1XR1	NM_024665.7	c.1106A>G	p.Asp369Gly	missense_variant	12/16	ENST00000457928.7
TBL1XR1-AS1	NR_174966.1	n.341-248T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBL1XR1	ENST00000457928.7	c.1106A>G	p.Asp369Gly	missense_variant	12/16	1	NM_024665.7	P1
TBL1XR1-AS1	ENST00000617758.1	n.341-248T>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

TBL1XR1-related neurodevelopmental disorder Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Aug 04, 2023

The TBL1XR1 c.1106A>G (p.Asp369Gly) missense variant has not, to our knowledge, been reported in the peer-reviewed literature. However, another variant at the same amino acid position, c.1107C>A (p.Asp369Gly), classified as a variant of uncertain significance, has been reported in a heterozygous de novo state in an individual with a developmental disorder (PMID:31785789). The c.1106A>G variant is not observed in version 2.1.1 or version 3.1.2 of the Genome Aggregation Database. The c.1106A>G variant is located in a known mutational hotspot (PMID: 32524419) with multiple lines of computational evidence suggesting the variant may impact the gene or gene product. This variant was identified in a de novo state. Based on the available evidence, the c.1106A>G (p.Asp369Gly) variant is classified as likely pathogenic for TBL1XR1-related neurodevelopmental disorder. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.19
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	T;T
Eigen	Pathogenic	0.72
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	.;D
M_CAP	Benign	0.049	D
MetaRNN	Pathogenic	0.90	D;D
MetaSVM	Benign	-0.43	T
MutationAssessor	Benign	0.68	N;N
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-6.6	D;D
REVEL	Pathogenic	0.70
Sift	Uncertain	0.023	D;D
Sift4G	Uncertain	0.046	D;D
Polyphen		0.99	D;D
Vest4		0.87
MutPred		0.59		Loss of stability (P = 0.0294);Loss of stability (P = 0.0294);
MVP		0.91
MPC		2.6
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.89
gMVP		0.85

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-176755902; COSMIC: COSV70499473; COSMIC: COSV70499473;