rs879253806

Variant names:

• chr13-100301581-TTGAA-T
• rs879253806
• NM_000282.4:c.1190_1193delAATG

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000282.4(PCCA):​c.1190_1193delAATG​(p.Glu397ValfsTer51) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,796 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PCCA NM_000282.4 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 9.61
• Publications: 0 publications found

Genes affected

PCCA (HGNC:8653): (propionyl-CoA carboxylase subunit alpha) The protein encoded by this gene is the alpha subunit of the heterodimeric mitochondrial enzyme Propionyl-CoA carboxylase. PCCA encodes the biotin-binding region of this enzyme. Mutations in either PCCA or PCCB (encoding the beta subunit) lead to an enzyme deficiency resulting in propionic acidemia. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2010]

PCCA Gene-Disease associations (from GenCC):

• propionic acidemia

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

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 13-100301581-TTGAA-T is Pathogenic according to our data. Variant chr13-100301581-TTGAA-T is described in ClinVar as Pathogenic. ClinVar VariationId is 218254.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000282.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCCA	NM_000282.4	MANE Select	c.1190_1193delAATG	p.Glu397ValfsTer51	frameshift	Exon 13 of 24	NP_000273.2
	PCCA	NM_001352605.2		c.1190_1193delAATG	p.Glu397ValfsTer51	frameshift	Exon 13 of 23	NP_001339534.1
	PCCA	NM_001127692.3		c.1112_1115delAATG	p.Glu371ValfsTer51	frameshift	Exon 12 of 23	NP_001121164.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCCA	ENST00000376285.6	TSL:1 MANE Select	c.1190_1193delAATG	p.Glu397ValfsTer51	frameshift	Exon 13 of 24	ENSP00000365462.1
	PCCA	ENST00000376286.8	TSL:2	c.1112_1115delAATG	p.Glu371ValfsTer51	frameshift	Exon 12 of 23	ENSP00000365463.4
	PCCA	ENST00000376279.7	TSL:2	c.1190_1193delAATG	p.Glu397ValfsTer51	frameshift	Exon 13 of 23	ENSP00000365456.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251396 AF XY: 0.00000736

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: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461796 Hom.: 0 AF XY: 0.00000275 AC XY: 2 AN XY: 727206

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111936

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Propionic acidemia Pathogenic:4

Dec 18, 2017

Counsyl

Significance: 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.

Nov 05, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Glu397Valfs*51) in the PCCA gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PCCA are known to be pathogenic (PMID: 15464417). This variant is present in population databases (rs779726158, gnomAD 0.003%). This premature translational stop signal has been observed in individual(s) with propionic acidemia (PMID: 9887338, 27227689). This variant is also known as 1115del4. ClinVar contains an entry for this variant (Variation ID: 218254). For these reasons, this variant has been classified as Pathogenic.

Apr 27, 2022

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Jan 01, 2013

Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.6
Mutation Taster		=2/198	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: rs879253806; hg19: chr13-100953835;