15-41504516-G-A

Position:

• chr15-41504516-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_002344.6(LTK):​c.2245C>T​(p.Pro749Ser) 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: LTK NM_002344.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.64

Genes affected

LTK (HGNC:6721): (leukocyte receptor tyrosine kinase) The protein encoded by this gene is a member of the ros/insulin receptor family of tyrosine kinases. Tyrosine-specific phosphorylation of proteins is a key to the control of diverse pathways leading to cell growth and differentiation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2008]

LTK (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.953

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LTK	NM_002344.6	c.2245C>T	p.Pro749Ser	missense_variant	18/20	ENST00000263800.11	NP_002335.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LTK	ENST00000263800.11	c.2245C>T	p.Pro749Ser	missense_variant	18/20	1	NM_002344.6	ENSP00000263800.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 08, 2024

The c.2245C>T (p.P749S) alteration is located in exon 18 (coding exon 18) of the LTK gene. This alteration results from a C to T substitution at nucleotide position 2245, causing the proline (P) at amino acid position 749 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.72
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.060
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.53	.;D;D;.
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.91	D;D;D;D
M_CAP	Benign	0.062	D
MetaRNN	Pathogenic	0.95	D;D;D;D
MetaSVM	Uncertain	0.68	D
MutationAssessor	Benign	1.6	.;L;.;.
PrimateAI	Benign	0.36	T
PROVEAN	Pathogenic	-7.3	D;D;D;D
REVEL	Pathogenic	0.65
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Uncertain	0.025	D;D;D;D
Polyphen		1.0	D;D;.;.
Vest4		0.63
MutPred		0.85		.;Gain of relative solvent accessibility (P = 0.1571);.;.;
MVP		0.95
MPC		0.56
ClinPred		1.0	D
GERP RS		4.6
Varity_R		0.84
gMVP		0.55

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-41796714;