17-81934670-C-T

Position:

chr17-81934670-C-T

Variant summary

Our verdict is Pathogenic. Variant got 20 ACMG points: 20P and 0B. PS1_ModeratePM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_006907.4(PYCR1):c.616G>A(p.Gly206Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000572 in 1,573,134 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 Likely pathogenic (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G206W) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000042 ( 0 hom. )

Consequence

PYCR1
NM_006907.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5O:1

Conservation

PhyloP100: 6.00

Variant links:

Genes affected

PYCR1 (HGNC:9721): (pyrroline-5-carboxylate reductase 1) This gene encodes an enzyme that catalyzes the NAD(P)H-dependent conversion of pyrroline-5-carboxylate to proline. This enzyme may also play a physiologic role in the generation of NADP(+) in some cell types. The protein forms a homopolymer and localizes to the mitochondrion. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]

PYCR1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 20 ACMG points.

PS1

Transcript NM_006907.4 (PYCR1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt

PM1

In a helix (size 19) in uniprot entity P5CR1_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_006907.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr17-81934670-C-A is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.977

PP5

Variant 17-81934670-C-T is Pathogenic according to our data. Variant chr17-81934670-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 68789.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-81934670-C-T is described in Lovd as [Pathogenic]. Variant chr17-81934670-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PYCR1	NM_006907.4 linkuse as main transcript	c.616G>A	p.Gly206Arg	missense_variant	5/7	ENST00000329875.13	NP_008838.2	P32322-1A0A024R8U9Q8TBX0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PYCR1	ENST00000329875.13 linkuse as main transcript	c.616G>A	p.Gly206Arg	missense_variant	5/7	1	NM_006907.4	ENSP00000328858.8		P32322-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

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:

0.0000107

AC:

AN:

186106

Hom.:

AF XY:

0.0000200

AC XY:

AN XY:

99988

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000814

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000422

AC:

AN:

1420924

Hom.:

Cov.:

AF XY:

0.00000569

AC XY:

AN XY:

703222

show subpopulations

Gnomad4 AFR exome

AF:

0.0000309

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000247

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000183

Gnomad4 OTH exome

AF:

0.0000170

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.0000724

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

Bravo

AF:

0.0000113

ExAC

AF:

0.00000841

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2Other:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 29, 2017	- -
not provided, no classification provided	literature only	UniProtKB/Swiss-Prot	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Dec 09, 2022	Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 32949114, 25525159, 19648921, 27023906, 27860360, 22887749, 21487760, 24035636, 29620724, 31829210, 34426522) -

Abnormality of connective tissue

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Kariminejad - Najmabadi Pathology & Genetics Center

Jul 10, 2021

- -

Autosomal recessive cutis laxa type 2B

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Sep 06, 2023

- -

Cutis laxa

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

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

Jun 14, 2024

Variant summary: PYCR1 c.616G>A (p.Gly206Arg) results in a non-conservative amino acid change located in the Pyrroline-5-carboxylate reductase, dimerisation domain (IPR029036) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 1.1e-05 in 186106 control chromosomes. c.616G>A has been reported in the literature in the homozygous state in multiple individuals affected with Cutis Laxa - PYCR1 Related (example, Dimopoulou_2013, Reversade_2009). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 24035636, 19648921). ClinVar contains an entry for this variant (Variation ID: 68789). Based on the evidence outlined above, the variant was classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.33

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.86

D;.;.;D;.;.;D;D;D

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.95

.;D;D;D;.;D;D;D;D

M_CAP

Pathogenic

0.74

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

0.54

MutationAssessor

Benign

1.6

L;L;.;L;.;.;.;.;.

PrimateAI

Pathogenic

0.84

PROVEAN

Uncertain

-2.6

D;D;.;.;.;D;.;.;.

REVEL

Pathogenic

0.82

Sift

Uncertain

0.0010

D;D;.;.;.;D;.;.;.

Sift4G

Pathogenic

0.0010

D;D;D;D;D;D;.;D;.

Polyphen

1.0

D;.;.;D;.;.;.;.;.

Vest4

0.94

MutPred

0.92

Loss of helix (P = 0.0041);Loss of helix (P = 0.0041);Loss of helix (P = 0.0041);Loss of helix (P = 0.0041);Loss of helix (P = 0.0041);.;.;Loss of helix (P = 0.0041);Loss of helix (P = 0.0041);

MVP

0.94

MPC

0.62

ClinPred

0.98

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.9

Varity_R

0.98

gMVP

0.98

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