13-100089135-G-A

Position:

• chr13-100089135-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_000282.4(PCCA):​c.15G>A​(p.Trp5Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000736 in 1,359,574 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: PCCA NM_000282.4 stop_gained
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.01

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 19 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCCA	NM_000282.4	c.15G>A	p.Trp5Ter	stop_gained	1/24	ENST00000376285.6	NP_000273.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PCCA	ENST00000376285.6	c.15G>A	p.Trp5Ter	stop_gained	1/24	1	NM_000282.4	ENSP00000365462	P1
PCCA	ENST00000376286.8	c.15G>A	p.Trp5Ter	stop_gained	1/23	2		ENSP00000365463
PCCA	ENST00000376279.7	c.15G>A	p.Trp5Ter	stop_gained	1/23	2		ENSP00000365456
PCCA	ENST00000647303.1	c.15G>A	p.Trp5Ter	stop_gained, NMD_transcript_variant	1/21			ENSP00000495663

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.36e-7 AC: 1 AN: 1359574 Hom.: 0 Cov.: 31 AF XY: 0.00000150 AC XY: 1 AN XY: 668212

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000304

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Propionic acidemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Jun 05, 2018

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	38
DANN	Uncertain	0.99
Eigen	Uncertain	0.35
Eigen_PC	Benign	0.097
FATHMM_MKL	Benign	0.20	N
MutationTaster	Benign	1.0	A;A;A
Vest4		0.65
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

LitVar

Other links and lift over

dbSNP: rs11539554; hg19: chr13-100741389;