8-144440133-T-G

Variant names:

• chr8-144440133-T-G
• NM_013432.5:c.1368A>C
• TONSL p.Leu456Leu

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_013432.5(TONSL):​c.1368A>C​(p.Leu456Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L456L) has been classified as Benign.

• Frequency: Genomes: not found (cov: 34)
• Consequence: TONSL NM_013432.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.18
• Publications: 0 publications found

Genes affected

TONSL (HGNC:7801): (tonsoku like, DNA repair protein) The protein encoded by this gene is thought to be a negative regulator of NF-kappa-B mediated transcription. The encoded protein may bind NF-kappa-B complexes and trap them in the cytoplasm, preventing them from entering the nucleus and interacting with the DNA. Phosphorylation of this protein targets it for degradation by the ubiquitination pathway, which frees the NF-kappa-B complexes to enter the nucleus. [provided by RefSeq, Jul 2008]

TONSL-AS1 (HGNC:51556): (TONSL antisense RNA 1)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.64).
• BP7: Synonymous conserved (PhyloP=1.18 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013432.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TONSL	NM_013432.5	MANE Select	c.1368A>C	p.Leu456Leu	synonymous	Exon 11 of 26	NP_038460.4
	TONSL-AS1	NR_109770.1		n.*240T>G		downstream_gene	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TONSL	ENST00000409379.8	TSL:1 MANE Select	c.1368A>C	p.Leu456Leu	synonymous	Exon 11 of 26	ENSP00000386239.3	Q96HA7-1
	TONSL	ENST00000932056.1		c.1368A>C	p.Leu456Leu	synonymous	Exon 11 of 27	ENSP00000602115.1
	TONSL	ENST00000971177.1		c.1368A>C	p.Leu456Leu	synonymous	Exon 11 of 26	ENSP00000641236.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 49

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.64
CADD	Benign	1.9
DANN	Benign	0.47
PhyloP100		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr8-145665516;