rs121964961

Variant names:

• chr3-136327638-A-G
• rs121964961
• NM_000532.5:c.1304A>G

Your query was ambiguous. Multiple possible variants found:

• chr3-136327638-A-G
• chr3-136327638-A-T

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PM1 PP2 PP3_Strong PP5_Very_Strong

The NM_000532.5(PCCB):​c.1304A>G​(p.Tyr435Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000085 in 1,612,342 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 14/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000088 (0 hom.)
• Consequence: PCCB NM_000532.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10 O:1
• Conservation: PhyloP100: 8.64
• Publications: 14 publications found

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

ACMG classification

Our verdict: Pathogenic. The variant received 15 ACMG points.

• PM1: In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_000532.5
• 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, 0.948
• PP5: Variant 3-136327638-A-G is Pathogenic according to our data. Variant chr3-136327638-A-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 12018.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	c.1304A>G	p.Tyr435Cys	missense_variant	Exon 13 of 15	ENST00000251654.9	NP_000523.2
PCCB	NM_001178014.2	c.1364A>G	p.Tyr455Cys	missense_variant	Exon 14 of 16		NP_001171485.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCCB	ENST00000251654.9	c.1304A>G	p.Tyr435Cys	missense_variant	Exon 13 of 15	1	NM_000532.5	ENSP00000251654.4

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152132 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000966

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

GnomAD2 exomes AF: 0.0000637 AC: 16 AN: 251316 AF XY: 0.0000515

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.0000884 AC: 129 AN: 1460092 Hom.: 0 Cov.: 31 AF XY: 0.0000743 AC XY: 54 AN XY: 726520

African (AFR) AF: 0.0000598 AC: 2 AN: 33432

American (AMR) AF: 0.0000224 AC: 1 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26122

East Asian (EAS) AF: 0.00285 AC: 113 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86200

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000901 AC: 10 AN: 1110400

Other (OTH) AF: 0.0000497 AC: 3 AN: 60344

GnomAD4 genome AF: 0.0000525 AC: 8 AN: 152250 Hom.: 0 Cov.: 32 AF XY: 0.0000672 AC XY: 5 AN XY: 74448

African (AFR) AF: 0.0000722 AC: 3 AN: 41562

American (AMR) AF: 0.00 AC: 0 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.000968 AC: 5 AN: 5164

South Asian (SAS) AF: 0.00 AC: 0 AN: 4814

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000102 Hom.: 1

Bravo AF: 0.0000264

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000494 AC: 6

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Propionic acidemia Pathogenic:10 Other:1

Mar 18, 2016

Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: reference population

- -

Aug 01, 2002

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

- -

Apr 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. -

Jul 12, 2023

Intergen, Intergen Genetics and Rare Diseases Diagnosis Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 20, 2017

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

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: The PCCB c.1304A>G (p.Tyr435Cys) variant located in the CoA carboxyltransferase C-terminal domain (via InterPro) involves the alteration of a conserved nucleotide and is predicted to be damaging by 5/5 in silico tools. This variant was found in 8/121510 control chromosomes including broad and large populations from ExAC at a heterozygous allele frequency of 0.0000658, which does not exceed the estimated maximal expected allele frequency of a pathogenic PCCB variant (0.0025). This variant is known to be a common pathogenic variant that causes mild propionic academia in Japanese population (Yorifuji_2002). The carrier frequency of this variant in Japanese population was estimated to be 1/86.5 by the authors. Enzymatic activity in peripheral blood leukocytes of patients carrying this variant in homozygous state or compound heterozygous state revealed significantly reduced but residual activity consistent with the phenotype caused (Yorifuji_2002). It was not found in a cohort of 30 patients with more severe form of disease in the same population (Yang_2004). Multiple reputable databases and the publications have classified this variant as pathogenic. Taken together, this variant is classified as Pathogenic. -

Nov 14, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 435 of the PCCB protein (p.Tyr435Cys). This variant is present in population databases (rs121964961, gnomAD 0.06%). This missense change has been observed in individuals with propionic acidemia (PMID: 12189489). ClinVar contains an entry for this variant (Variation ID: 12018). 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 80%. For these reasons, this variant has been classified as Pathogenic. -

Oct 29, 2021

Revvity Omics, Revvity

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 14, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 21, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Juno Genomics, Hangzhou Juno Genomics, Inc

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PM2_Supporting+PP3+PM3_Strong -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.88
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.61
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.92	D;.;.;D;D;D;.;.;.
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.57	D
MetaRNN	Pathogenic	0.95	D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.7	H;.;.;.;.;.;.;.;.
PhyloP100		8.6
PrimateAI	Pathogenic	0.87	D
PROVEAN	Pathogenic	-8.2	D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	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		0.99
MVP		0.98
MPC		0.58
ClinPred		0.97	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.92
Mutation Taster		=0/100	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121964961; hg19: chr3-136046480;