3-136327184-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 19 ACMG points: 19P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Very_Strong

The NM_000532.5(PCCB):c.1228C>T(p.Arg410Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000421 in 1,613,300 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. R410Q) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000040 ( 0 hom. )

Consequence

PCCB
NM_000532.5 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:11O:1

Conservation

PhyloP100: 1.21

Publications

33 publications found

Variant links:

Genes affected

PCCB (HGNC:8654): (propionyl-CoA carboxylase subunit beta) The protein encoded by this gene is a subunit of the propionyl-CoA carboxylase (PCC) enzyme, which is involved in the catabolism of propionyl-CoA. PCC is a mitochondrial enzyme that probably acts as a dodecamer of six alpha subunits and six beta subunits. This gene encodes the beta subunit of PCC. Defects in this gene are a cause of propionic acidemia type II (PA-2). Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2010]

PCCB Gene-Disease associations (from GenCC):

propionic acidemia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), G2P, ClinGen, Myriad Women’s Health, Orphanet

PCCB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 19 ACMG points.

PM1

In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 13 uncertain in NM_000532.5

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr3-136327185-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 557302.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 61 curated pathogenic missense variants (we use a threshold of 10). The gene has 6 curated benign missense variants. Gene score misZ: -0.86701 (below the threshold of 3.09). Trascript score misZ: -0.97134 (below the threshold of 3.09). GenCC associations: The gene is linked to propionic acidemia.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.971

PP5

Variant 3-136327184-C-T is Pathogenic according to our data. Variant chr3-136327184-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 12011.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCCB	NM_000532.5 link	c.1228C>T	p.Arg410Trp	missense_variant	Exon 12 of 15	ENST00000251654.9	NP_000523.2	P05166-1
PCCB	NM_001178014.2 link	c.1288C>T	p.Arg430Trp	missense_variant	Exon 13 of 16		NP_001171485.1	P05166-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCCB	ENST00000251654.9 link	c.1228C>T	p.Arg410Trp	missense_variant	Exon 12 of 15	1	NM_000532.5	ENSP00000251654.4		P05166-1

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000279

AC:

AN:

251032

AF XY:

0.0000147

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 FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000404

AC:

AN:

1461182

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

726946

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000450

AC:

AN:

1111356

Other (OTH)

AF:

0.0000166

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000592

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74312

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41424

American (AMR)

AF:

0.000131

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000192

AC:

AN:

5202

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68000

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000139

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:11Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Propionic acidemia

Pathogenic:9Other:1

Jul 25, 2023

Kasturba Medical College, Manipal, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Biallelic loss-of-function variants in SLC13A5 are known to cause developmental and epileptic encephalopathy 25, with amelogenesis imperfecta (MIM# 615905). The clinical features observed in the proband, and his sibling are in concordance with developmental and epileptic encephalopathy 25, with amelogenesis imperfecta. -

Mar 13, 2020

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

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: PCCB c.1228C>T (p.Arg410Trp) results in a non-conservative amino acid change located in the Acetyl-coenzyme A carboxyltransferase, C-terminal (IPR011763) 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 2.8e-05 in 251032 control chromosomes (gnomAD). c.1228C>T has been reported in the literature in multiple individuals (both homozygous and compound heterozygous) affected with Propionic Acidemia (e.g. Chloupkova_2002, McCrory_2017, Kraus_2012, Gravel_1994). These data indicate that the variant is very likely to be associated with disease. In functional studies, the variant was found to have reduced enzymatic activity (Kraus_2012, Perez-Cedra_2003). Three ClinVar submitters (evaluation after 2014) cite the variant as likely pathogenic/pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic -

Jan 01, 1999

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

GeneReviews

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Feb 25, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 15, 2021

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 05, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 410 of the PCCB protein (p.Arg410Trp). This variant is present in population databases (rs121964959, gnomAD 0.006%). This missense change has been observed in individuals with propionic acidemia (PMID: 8411997, 12007220, 22033733). ClinVar contains an entry for this variant (Variation ID: 12011). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt PCCB protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects PCCB function (PMID: 12757933, 15890657, 15949719). For these reasons, this variant has been classified as Pathogenic. -

May 28, 2019

Mendelics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 18, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 17, 2017

Counsyl

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

not provided

Pathogenic:2

Aug 05, 2024

Mayo Clinic Laboratories, Mayo Clinic

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PP3_strong, PM3_strong, PM5, PS3_supporting -

Nov 15, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Published functional studies demonstrate a damaging effect:11.5% of wild-type propionyl-CoA carboxylase activity (PMID: 12757933); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 15059621, 8023851, 15890657, 12007220, 8411997, 12559849, 25865301, 9683601, 22033733, 15235904, 31589614, 33028371, 33473339, 35331292, 12757933) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.64

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.54

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.93

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

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.89

LIST_S2

Pathogenic

1.0

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

M_CAP

Pathogenic

0.49

MetaRNN

Pathogenic

0.97

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

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.5

H;.;.;.;.;.;.;.;.

PhyloP100

1.2

PrimateAI

Pathogenic

0.92

PROVEAN

Pathogenic

-6.3

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

REVEL

Pathogenic

0.98

Sift

Uncertain

0.0010

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

Sift4G

Pathogenic

0.0

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

Polyphen

1.0

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

Vest4

0.97

MutPred

0.86

Loss of methylation at R410 (P = 0.071);.;.;.;.;.;.;Loss of methylation at R410 (P = 0.071);.;

MVP

0.98

MPC

0.53

ClinPred

0.99

GERP RS

2.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.87

gMVP

0.90

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over