13-100157304-A-C

Variant names:

• chr13-100157304-A-C
• NM_000282.4:c.432A>C
• PCCA p.Gly144Gly

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000282.4(PCCA):​c.432A>C​(p.Gly144Gly) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G144G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PCCA NM_000282.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.957
• 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: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Myriad Women's Health

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.62).
• BP7: Synonymous conserved (PhyloP=0.957 with no splicing effect.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCCA	NM_000282.4	MANE Select	c.432A>C	p.Gly144Gly	synonymous	Exon 6 of 24	NP_000273.2	P05165-1
	PCCA	NM_001352605.2		c.432A>C	p.Gly144Gly	synonymous	Exon 6 of 23	NP_001339534.1
	PCCA	NM_001127692.3		c.354A>C	p.Gly118Gly	synonymous	Exon 5 of 23	NP_001121164.1	P05165-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCCA	ENST00000376285.6	TSL:1 MANE Select	c.432A>C	p.Gly144Gly	synonymous	Exon 6 of 24	ENSP00000365462.1	P05165-1
	PCCA	ENST00000881637.1		c.432A>C	p.Gly144Gly	synonymous	Exon 6 of 25	ENSP00000551696.1
	PCCA	ENST00000881640.1		c.432A>C	p.Gly144Gly	synonymous	Exon 6 of 25	ENSP00000551699.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.62
CADD	Benign	12
DANN	Benign	0.70
PhyloP100		0.96
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr13-100809558;