1-42746744-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_022356.4(P3H1):c.2164C>A(p.Gln722Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000322 in 1,552,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

P3H1
NM_022356.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 0.107

Variant links:

Genes affected

P3H1 (HGNC:19316): (prolyl 3-hydroxylase 1) This gene encodes an enzyme that is a member of the collagen prolyl hydroxylase family. These enzymes are localized to the endoplasmic reticulum and their activity is required for proper collagen synthesis and assembly. Mutations in this gene are associated with osteogenesis imperfecta type VIII. Three alternatively spliced transcript variants encoding different isoforms have been described. Other variants may exist, but their biological validity has not been determined. [provided by RefSeq, Aug 2011]

P3H1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.06189087).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
P3H1	NM_022356.4 linkuse as main transcript	c.2164C>A	p.Gln722Lys	missense_variant	15/15	ENST00000296388.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
P3H1	ENST00000296388.10 linkuse as main transcript	c.2164C>A	p.Gln722Lys	missense_variant	15/15	1	NM_022356.4	P1	Q32P28-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000378

AC:

AN:

158866

Hom.:

AF XY:

0.0000357

AC XY:

AN XY:

84108

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000402

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000871

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000485

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000321

AC:

AN:

1400572

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

690916

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000280

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000126

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000287

Gnomad4 OTH exome

AF:

0.0000517

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ExAC

AF:

0.0000386

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 14, 2023	See Variant Classification Assertion Criteria. -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 28, 2016	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Oct 01, 2022

Variant summary: P3H1 c.2164C>A (p.Gln722Lys) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 3.8e-05 in 158866 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.2164C>A has been reported in the literature in the homozygous state in a consanguinous family affected with Childhood onset Neurodegeneration, however, segregation analysis indicated that a homozygous frameshift in SQSTM1 was determined to be the cause of the observed phenotype (Haack_2016). Therefore, this report does not provide unequivocal conclusions about association of the variant with Osteogenesis Imperfecta. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Two ClinVar submitters have assessed this variant since 2014: both classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Osteogenesis imperfecta type 8

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 13, 2022

This sequence change replaces glutamine, which is neutral and polar, with lysine, which is basic and polar, at codon 722 of the P3H1 protein (p.Gln722Lys). This variant is present in population databases (rs771006240, gnomAD 0.005%). This variant has not been reported in the literature in individuals affected with P3H1-related conditions. ClinVar contains an entry for this variant (Variation ID: 288206). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.058

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.69

Cadd

Benign

1.3

Dann

Benign

0.43

DEOGEN2

Benign

0.054

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.031

LIST_S2

Benign

0.54

M_CAP

Benign

0.018

MetaRNN

Benign

0.062

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.1

MutationTaster

Benign

1.0

N;N;N

PROVEAN

Benign

-0.15

REVEL

Benign

0.0010

Sift

Benign

0.20

Sift4G

Benign

0.82

Polyphen

0.0050

Vest4

0.058

MVP

0.14

ClinPred

0.015

GERP RS

-2.0

Varity_R

0.057

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over