9-84948455-T-G

Variant names:

• chr9-84948455-T-G
• rs2289658
• NM_006180.6:c.1765-7T>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_006180.6(NTRK2):​c.1765-7T>G variant causes a splice region, intron 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. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NTRK2 NM_006180.6 splice_region, intron
• Scores: Splicing: ADA: 0.9894
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.818
• Publications: 0 publications found

Genes affected

NTRK2 (HGNC:8032): (neurotrophic receptor tyrosine kinase 2) This gene encodes a member of the neurotrophic tyrosine receptor kinase (NTRK) family. This kinase is a membrane-bound receptor that, upon neurotrophin binding, phosphorylates itself and members of the MAPK pathway. Signalling through this kinase leads to cell differentiation. Mutations in this gene have been associated with obesity and mood disorders. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

NTRK2 Gene-Disease associations (from GenCC):

• developmental and epileptic encephalopathy, 58

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• obesity, hyperphagia, and developmental delay

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• infantile spasms

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006180.6. 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
	NTRK2	NM_006180.6	MANE Select	c.1765-7T>G		splice_region intron	N/A	NP_006171.2
	NTRK2	NM_001018064.3		c.1717-7T>G		splice_region intron	N/A	NP_001018074.1	Q548C2
	NTRK2	NM_001369532.1		c.1717-7T>G		splice_region intron	N/A	NP_001356461.1	Q16620-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NTRK2	ENST00000277120.8	TSL:1 MANE Select	c.1765-7T>G		splice_region intron	N/A	ENSP00000277120.3	Q16620-4
	NTRK2	ENST00000323115.11	TSL:1	c.1681-7T>G		splice_region intron	N/A	ENSP00000314586.5	A0A8J8YUT9
	NTRK2	ENST00000686324.1		c.1765-7T>G		splice_region intron	N/A	ENSP00000510134.1	Q16620-4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	20
DANN	Benign	0.46
PhyloP100		-0.82

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.81
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_AG_spliceai		1.0		Position offset: 1
DS_AL_spliceai		0.93		Position offset: 7

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

Other links and lift over

dbSNP: rs2289658; hg19: chr9-87563370;