Genetic Variant PCCB:p.Ala4Ala (chr3-136250387-A-G) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_000532.5(PCCB):c.12A>G(p.Ala4Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000289 in 1,384,118 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A4A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

PCCB
NM_000532.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.908

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: Likely_benign. The variant received -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.73).

BP6

Variant 3-136250387-A-G is Benign according to our data. Variant chr3-136250387-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 1093946.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.908 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCCB	NM_000532.5 link	c.12A>G	p.Ala4Ala	synonymous_variant	Exon 1 of 15	ENST00000251654.9	NP_000523.2	P05166-1
PCCB	NM_001178014.2 link	c.12A>G	p.Ala4Ala	synonymous_variant	Exon 1 of 16		NP_001171485.1	P05166-2
PCCB	XM_011512873.2 link	c.12A>G	p.Ala4Ala	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.12A>G	p.Ala4Ala	synonymous_variant	Exon 1 of 15	1	NM_000532.5	ENSP00000251654.4		P05166-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000190

AC:

AN:

157484

AF XY:

0.0000233

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000123

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000289

AC:

AN:

1384118

Hom.:

Cov.:

AF XY:

0.00000294

AC XY:

AN XY:

680424

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31420

American (AMR)

AF:

0.0000842

AC:

AN:

35614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22960

East Asian (EAS)

AF:

0.00

AC:

AN:

36728

South Asian (SAS)

AF:

0.00

AC:

AN:

76828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5344

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1069686

Other (OTH)

AF:

0.0000175

AC:

AN:

57010

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000509

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Propionic acidemia

Benign:1

Mar 25, 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

-0.73

CADD

Benign

4.1

(source)

DANN

Benign

0.69

PhyloP100

-0.91

PromoterAI

0.0014

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

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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3-136250387-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over