12-70540862-C-T

Position:

• chr12-70540862-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001109754.4(PTPRB):​c.5590G>A​(p.Val1864Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000208 in 1,444,134 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PTPRB NM_001109754.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.113

Genes affected

PTPRB (HGNC:9665): (protein tyrosine phosphatase receptor type B) 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 contains an extracellular domain, a single transmembrane segment and one intracytoplasmic catalytic domain, thus belongs to receptor type PTP. The extracellular region of this PTP is composed of multiple fibronectin type_III repeats, which was shown to interact with neuronal receptor and cell adhesion molecules, such as contactin and tenascin C. This protein was also found to interact with sodium channels, and thus may regulate sodium channels by altering tyrosine phosphorylation status. The functions of the interaction partners of this protein implicate the roles of this PTP in cell adhesion, neurite growth, and neuronal differentiation. Alternate transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2011]

ENSG00000258168 (HGNC:58150):

LOC105369828 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06037247).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTPRB	NM_001109754.4	c.5590G>A	p.Val1864Met	missense_variant	23/34	ENST00000334414.11	NP_001103224.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTPRB	ENST00000334414.11	c.5590G>A	p.Val1864Met	missense_variant	23/34	1	NM_001109754.4	ENSP00000334928.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000208 AC: 3 AN: 1444134 Hom.: 0 Cov.: 29 AF XY: 0.00000279 AC XY: 2 AN XY: 716286

Gnomad4 AFR exome AF: 0.0000903

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

Asia WGS AF: 0.000289 AC: 1 AN: 3478

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

Aug 17, 2022

The c.5590G>A (p.V1864M) alteration is located in exon 23 (coding exon 23) of the PTPRB gene. This alteration results from a G to A substitution at nucleotide position 5590, causing the valine (V) at amino acid position 1864 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
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Benign	0.078	.;T;.;.;T
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.12	N
LIST_S2	Uncertain	0.94	D;D;D;D;D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.060	T;T;T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	1.6	.;.;.;.;L
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.020	N;N;N;N;N
REVEL	Benign	0.056
Sift	Benign	0.085	T;D;D;D;T
Sift4G	Uncertain	0.018	D;D;D;D;D
Polyphen		0.77	P;D;.;P;P
Vest4		0.27
MutPred		0.38		.;Loss of methylation at K1775 (P = 0.0184);.;.;.;
MVP		0.14
MPC		0.81
ClinPred		0.25	T
GERP RS		0.50
Varity_R		0.066
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1482928219; hg19: chr12-70934642; COSMIC: COSV54246745; COSMIC: COSV54246745;