rs1553510492

Positions:

• chr2-161419040-A-G

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM2 PP3_Moderate PP5_Very_Strong

The NM_006593.4(TBR1):​c.1118A>G​(p.Gln373Arg) 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: TBR1 NM_006593.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 9.32

Genes affected

TBR1 (HGNC:11590): (T-box brain transcription factor 1) This gene is a member of a conserved family of genes that share a common DNA-binding domain, the T-box. T-box genes encode transcription factors involved in the regulation of numerous developmental processes. In mouse, the ortholog of this gene is expressed in the cerebral cortex, hippocampus, amygdala and olfactory bulb and is thought to play an important role in neuronal migration and axonal projection. In mouse, the C-terminal region of this protein was found to be necessary and sufficient for association with the guanylate kinase domain of calcium/calmodulin-dependent serine protein kinase. [provided by RefSeq, Dec 2015]

TBR1 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM1: In a DNA_binding_region T-box (size 180) in uniprot entity TBR1_HUMAN there are 7 pathogenic changes around while only 1 benign (88%) in NM_006593.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.918
• PP5: Variant 2-161419040-A-G is Pathogenic according to our data. Variant chr2-161419040-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 523679.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-161419040-A-G is described in Lovd as [Pathogenic]. Variant chr2-161419040-A-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBR1	NM_006593.4	c.1118A>G	p.Gln373Arg	missense_variant	4/6	ENST00000389554.8	NP_006584.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBR1	ENST00000389554.8	c.1118A>G	p.Gln373Arg	missense_variant	4/6	1	NM_006593.4	ENSP00000374205.3
TBR1	ENST00000410035.1	c.257A>G	p.Gln86Arg	missense_variant	3/5	2		ENSP00000387023.1
TBR1	ENST00000411412.5	c.323A>G	p.Gln108Arg	missense_variant	3/6	5		ENSP00000393934.1
TBR1	ENST00000463544.1	n.2340A>G		non_coding_transcript_exon_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Moderate global developmental delay Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Mar 16, 2017

- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Nov 08, 2022

Not observed at significant frequency 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: 24896178) -

Atypical behavior;C0036572:Seizure;C1861866:Aplasia/Hypoplasia of the corpus callosum;C2237142:Moderate global developmental delay Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Oct 13, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	33
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.92	D;.;.
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.72	T;T;T
M_CAP	Pathogenic	0.50	D
MetaRNN	Pathogenic	0.92	D;D;D
MetaSVM	Uncertain	0.63	D
MutationAssessor	Pathogenic	3.3	M;.;.
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-3.5	D;D;D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D;D;D
Sift4G	Uncertain	0.0050	D;D;D
Polyphen		0.96	D;.;.
Vest4		0.98
MutPred		0.79		Loss of sheet (P = 0.1907);.;.;
MVP		0.96
ClinPred		0.99	D
GERP RS		4.6
Varity_R		0.80
gMVP		0.97

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: rs1553510492; hg19: chr2-162275551;