chr8-27397646-G-A

Position:

• chr8-27397646-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_173176.3(PTK2B):​c.62G>A​(p.Gly21Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000031 in 1,614,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G21A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 34)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: PTK2B NM_173176.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.65

Genes affected

PTK2B (HGNC:9612): (protein tyrosine kinase 2 beta) This gene encodes a cytoplasmic protein tyrosine kinase which is involved in calcium-induced regulation of ion channels and activation of the map kinase signaling pathway. The encoded protein may represent an important signaling intermediate between neuropeptide-activated receptors or neurotransmitters that increase calcium flux and the downstream signals that regulate neuronal activity. The encoded protein undergoes rapid tyrosine phosphorylation and activation in response to increases in the intracellular calcium concentration, nicotinic acetylcholine receptor activation, membrane depolarization, or protein kinase C activation. This protein has been shown to bind CRK-associated substrate, nephrocystin, GTPase regulator associated with FAK, and the SH2 domain of GRB2. The encoded protein is a member of the FAK subfamily of protein tyrosine kinases but lacks significant sequence similarity to kinases from other subfamilies. Four transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23282456).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTK2B	NM_173176.3	c.62G>A	p.Gly21Asp	missense_variant	2/31	ENST00000346049.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTK2B	ENST00000346049.10	c.62G>A	p.Gly21Asp	missense_variant	2/31	1	NM_173176.3	A1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152244 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461888 Hom.: 0 Cov.: 64 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152244 Hom.: 0 Cov.: 34 AF XY: 0.0000134 AC XY: 1 AN XY: 74374

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000274 Hom.: 0

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

Sep 25, 2023

The c.62G>A (p.G21D) alteration is located in exon 7 (coding exon 1) of the PTK2B gene. This alteration results from a G to A substitution at nucleotide position 62, causing the glycine (G) at amino acid position 21 to be replaced by an aspartic acid (D). 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	Benign	0.12
BayesDel_addAF	Uncertain	0.056	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.37	T;T;.;T;.;T;T;.
Eigen	Benign	0.039
Eigen_PC	Benign	0.12
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.90	.;D;D;D;D;D;D;.
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.43	T
MutationAssessor	Benign	1.8	L;.;.;L;L;.;.;L
MutationTaster	Benign	0.92	D;D;D;D;D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-2.7	D;D;D;D;D;D;D;D
REVEL	Uncertain	0.34
Sift	Uncertain	0.0050	D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.012	D;D;D;D;D;D;D;D
Polyphen		0.016	B;.;.;B;P;.;.;P
Vest4		0.48
MutPred		0.18		Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);Loss of MoRF binding (P = 0.1153);
MVP		0.76
MPC		0.46
ClinPred		0.82	D
GERP RS		2.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.41
gMVP		0.46

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: rs771540159; hg19: chr8-27255163;