6-127985832-G-A

Position:

• chr6-127985832-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_Moderate BS2

The NM_002844.4(PTPRK):​c.3140C>T​(p.Thr1047Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000161 in 1,613,366 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: PTPRK NM_002844.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

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 Likely_benign. Variant got -2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.882
• BS2: High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTPRK	NM_002844.4	c.3140C>T	p.Thr1047Met	missense_variant	22/30	ENST00000368226.9	NP_002835.2
PTPRK	NM_001291981.2	c.3206C>T	p.Thr1069Met	missense_variant	25/33		NP_001278910.1
PTPRK	NM_001135648.3	c.3158C>T	p.Thr1053Met	missense_variant	23/31		NP_001129120.1
PTPRK	NM_001291984.2	c.3137C>T	p.Thr1046Met	missense_variant	22/30		NP_001278913.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTPRK	ENST00000368226.9	c.3140C>T	p.Thr1047Met	missense_variant	22/30	1	NM_002844.4	ENSP00000357209.4

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152128 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000199 AC: 5 AN: 250940 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135632

Gnomad AFR exome AF: 0.0000616

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.0000994

Gnomad EAS exome AF: 0.0000545

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000144 AC: 21 AN: 1461238 Hom.: 0 Cov.: 31 AF XY: 0.0000151 AC XY: 11 AN XY: 726870

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000990

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152128 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74318

Gnomad4 AFR AF: 0.000121

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: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000112 Hom.: 0

Bravo AF: 0.0000189

ExAC AF: 0.0000494 AC: 6

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

Oct 30, 2023

The c.3158C>T (p.T1053M) alteration is located in exon 23 (coding exon 23) of the PTPRK gene. This alteration results from a C to T substitution at nucleotide position 3158, causing the threonine (T) at amino acid position 1053 to be replaced by a methionine (M). 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	0.21
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Pathogenic	0.16
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.61	.;.;.;D;D;.
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.087	D
MetaRNN	Pathogenic	0.88	D;D;D;D;D;D
MetaSVM	Benign	-0.77	T
MutationAssessor	Uncertain	2.5	.;.;.;.;M;.
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-4.5	D;D;D;D;D;D
REVEL	Uncertain	0.60
Sift	Uncertain	0.0080	D;D;D;D;D;D
Sift4G	Uncertain	0.014	D;D;D;D;D;D
Polyphen		1.0	D;.;D;.;D;.
Vest4		0.92
MutPred		0.77		.;.;.;.;Gain of catalytic residue at T1046 (P = 0.0311);.;
MVP		0.42
MPC		1.3
ClinPred		0.86	D
GERP RS		6.0
Varity_R		0.33
gMVP		0.63

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: rs201396562; hg19: chr6-128306977;