chr12-15322748-A-C

Position:

• chr12-15322748-A-C

Variant summary

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

The NM_030667.3(PTPRO):​c.22A>C​(p.Ile8Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict 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. I8T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTPRO NM_030667.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.130

Genes affected

PTPRO (HGNC:9678): (protein tyrosine phosphatase receptor type O) This gene encodes a member of the R3 subtype family of receptor-type protein tyrosine phosphatases. These proteins are localized to the apical surface of polarized cells and may have tissue-specific functions through activation of Src family kinases. This gene contains two distinct promoters, and alternatively spliced transcript variants encoding multiple isoforms have been observed. The encoded proteins may have multiple isoform-specific and tissue-specific functions, including the regulation of osteoclast production and activity, inhibition of cell proliferation and facilitation of apoptosis. This gene is a candidate tumor suppressor, and decreased expression of this gene has been observed in several types of cancer. [provided by RefSeq, May 2011]

LOC105369673 (HGNC:):

RERG (HGNC:15980): (RAS like estrogen regulated growth inhibitor) RERG, a member of the RAS superfamily of GTPases, inhibits cell proliferation and tumor formation (Finlin et al., 2001 [PubMed 11533059]).[supplied by OMIM, Mar 2009]

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=0.062089533).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTPRO	NM_030667.3	c.22A>C	p.Ile8Leu	missense_variant	1/27	ENST00000281171.9
LOC105369673	XR_007063224.1	n.332+14629T>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTPRO	ENST00000281171.9	c.22A>C	p.Ile8Leu	missense_variant	1/27	1	NM_030667.3	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

Aug 16, 2022

The c.22A>C (p.I8L) alteration is located in exon 1 (coding exon 1) of the PTPRO gene. This alteration results from a A to C substitution at nucleotide position 22, causing the isoleucine (I) at amino acid position 8 to be replaced by a leucine (L). 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	0.075
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.75
CADD	Benign	2.4
DANN	Benign	0.67
DEOGEN2	Benign	0.094	T;.;.
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.044	N
LIST_S2	Benign	0.59	T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.062	T;T;T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	0.55	N;N;N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.020	N;N;N
REVEL	Benign	0.017
Sift	Benign	0.17	T;T;T
Sift4G	Benign	0.27	T;T;T
Polyphen		0.0	B;.;B
Vest4		0.096
MutPred		0.24		Gain of catalytic residue at T6 (P = 0);Gain of catalytic residue at T6 (P = 0);Gain of catalytic residue at T6 (P = 0);
MVP		0.17
MPC		0.27
ClinPred		0.027	T
GERP RS		1.7
Varity_R		0.069
gMVP		0.17

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: chr12-15475682;