6-127981127-C-T

Position:

• chr6-127981127-C-T

Variant summary

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

The NM_002844.4(PTPRK):​c.3700G>A​(p.Ala1234Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTPRK NM_002844.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.91

Genes affected

PTPRK (HGNC:9674): (protein tyrosine phosphatase receptor type K) The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP possesses an extracellular region, a single transmembrane region, and two tandem catalytic domains, and thus represents a receptor-type PTP. The extracellular region contains a meprin-A5 antigen-PTP mu (MAM) domain, an Ig-like domain and four fibronectin type III-like repeats. This PTP was shown to mediate homophilic intercellular interaction, possibly through the interaction with beta- and gamma-catenin at adherens junctions. Expression of this gene was found to be stimulated by TGF-beta 1, which may be important for the inhibition of keratinocyte proliferation. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTPRK	NM_002844.4	c.3700G>A	p.Ala1234Thr	missense_variant	25/30	ENST00000368226.9
PTPRK	NM_001291981.2	c.3766G>A	p.Ala1256Thr	missense_variant	28/33
PTPRK	NM_001135648.3	c.3718G>A	p.Ala1240Thr	missense_variant	26/31
PTPRK	NM_001291984.2	c.3697G>A	p.Ala1233Thr	missense_variant	25/30

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTPRK	ENST00000368226.9	c.3700G>A	p.Ala1234Thr	missense_variant	25/30	1	NM_002844.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Feb 17, 2022

The c.3718G>A (p.A1240T) alteration is located in exon 26 (coding exon 26) of the PTPRK gene. This alteration results from a G to A substitution at nucleotide position 3718, causing the alanine (A) at amino acid position 1240 to be replaced by a threonine (T). 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	Uncertain	0.38
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.51	.;.;.;D;T;.
Eigen	Pathogenic	0.78
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Benign	0.010	T
MetaRNN	Uncertain	0.71	D;D;D;D;D;D
MetaSVM	Benign	-1.2	T
MutationAssessor	Benign	1.6	.;.;.;.;L;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.88	D
PROVEAN	Uncertain	-2.5	N;N;N;N;N;N
REVEL	Uncertain	0.34
Sift	Benign	0.042	D;D;D;D;D;D
Sift4G	Benign	0.13	T;T;T;T;T;T
Polyphen		0.99	D;.;D;.;D;.
Vest4		0.81
MutPred		0.58		.;.;.;.;Loss of stability (P = 0.0624);.;
MVP		0.27
MPC		1.3
ClinPred		0.86	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.37
gMVP		0.71

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: chr6-128302272;