Genetic Variant PCCB:p.Ala3Ala (chr3-136250384-G-C) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2BP4_StrongBP6_Very_StrongBP7

The NM_000532.5(PCCB):c.9G>C(p.Ala3Ala) variant causes a synonymous 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. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A3A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

PCCB
NM_000532.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.0540

Publications

0 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:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.48).

BP6

Variant 3-136250384-G-C is Benign according to our data. Variant chr3-136250384-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 513608.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.054 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCCB	NM_000532.5 link	c.9G>C	p.Ala3Ala	synonymous_variant	Exon 1 of 15	ENST00000251654.9	NP_000523.2	P05166-1
PCCB	NM_001178014.2 link	c.9G>C	p.Ala3Ala	synonymous_variant	Exon 1 of 16		NP_001171485.1	P05166-2
PCCB	XM_011512873.2 link	c.9G>C	p.Ala3Ala	synonymous_variant	Exon 1 of 11		XP_011511175.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCCB	ENST00000251654.9 link	c.9G>C	p.Ala3Ala	synonymous_variant	Exon 1 of 15	1	NM_000532.5	ENSP00000251654.4		P05166-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1377470

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

676422

African (AFR)

AF:

0.00

AC:

AN:

31158

American (AMR)

AF:

0.00

AC:

AN:

34730

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22640

East Asian (EAS)

AF:

0.00

AC:

AN:

36520

South Asian (SAS)

AF:

0.00

AC:

AN:

76012

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48228

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5270

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1066230

Other (OTH)

AF:

0.00

AC:

AN:

56682

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Dec 11, 2017

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Propionic acidemia

Benign:1

Mar 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.48

CADD

Benign

5.5

(source)

DANN

Benign

0.66

PhyloP100

-0.054

PromoterAI

0.040

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.9

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over