12-6833798-C-T

Variant summary

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

The NM_014262.5(P3H3):c.1322C>T(p.Thr441Ile) 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. 11/16 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)
• Consequence: P3H3 NM_014262.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.225

Genes affected

P3H3 (HGNC:19318): (prolyl 3-hydroxylase 3) The protein encoded by this gene belongs to the leprecan family of proteoglycans, which function as collagen prolyl hydroxylases that are required for proper collagen biosynthesis, folding and assembly. This protein, like other family members, is thought to reside in the endoplasmic reticulum. Epigenetic inactivation of this gene is associated with breast and other cancers, suggesting that it may function as a tumor suppressor. [provided by RefSeq, Aug 2013]

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=0.0647473).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
P3H3	NM_014262.5	c.1322C>T	p.Thr441Ile	missense_variant	8/15	ENST00000290510.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
P3H3	ENST00000290510.10	c.1322C>T	p.Thr441Ile	missense_variant	8/15	1	NM_014262.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Jun 09, 2022

The c.1322C>T (p.T441I) alteration is located in exon 8 (coding exon 8) of the P3H3 gene. This alteration results from a C to T substitution at nucleotide position 1322, causing the threonine (T) at amino acid position 441 to be replaced by an isoleucine (I). 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	0.091
BayesDel_addAF	Benign	-0.063	T
BayesDel_noAF	Benign	-0.33
Cadd	Benign	17
Dann	Uncertain	0.98
DEOGEN2	Benign	0.087	T
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.57	T
M_CAP	Benign	0.0092	T
MetaRNN	Benign	0.065	T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	D;N;N
REVEL	Benign	0.14
Sift4G	Benign	0.21	T
Polyphen		0.017	B
Vest4		0.21
MutPred		0.36		Loss of phosphorylation at T441 (P = 0.0348);
MVP		0.11
ClinPred		0.51	D
GERP RS		4.7
Varity_R		0.027
gMVP		0.56

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: chr12-6942962;