chr11-34916259-C-G

Variant names:

• chr11-34916259-C-G
• NM_015957.4:c.26G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015957.4(APIP):​c.26G>C​(p.Gly9Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,244 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 36)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: APIP NM_015957.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.41

Genes affected

APIP (HGNC:17581): (APAF1 interacting protein) Enables identical protein binding activity; methylthioribulose 1-phosphate dehydratase activity; and zinc ion binding activity. Involved in several processes, including L-methionine salvage from methylthioadenosine; protein homotetramerization; and pyroptosis. Located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

PDHX (HGNC:21350): (pyruvate dehydrogenase complex component X) The pyruvate dehydrogenase (PDH) complex is located in the mitochondrial matrix and catalyzes the conversion of pyruvate to acetyl coenzyme A. The PDH complex thereby links glycolysis to Krebs cycle. The PDH complex contains three catalytic subunits, E1, E2, and E3, two regulatory subunits, E1 kinase and E1 phosphatase, and a non-catalytic subunit, E3 binding protein (E3BP). This gene encodes the E3 binding protein subunit; also known as component X of the pyruvate dehydrogenase complex. This protein tethers E3 dimers to the E2 core of the PDH complex. Defects in this gene are a cause of pyruvate dehydrogenase deficiency which results in neurological dysfunction and lactic acidosis in infancy and early childhood. This protein is also a minor antigen for antimitochondrial antibodies. These autoantibodies are present in nearly 95% of patients with the autoimmune liver disease primary biliary cirrhosis (PBC). In PBC, activated T lymphocytes attack and destroy epithelial cells in the bile duct where this protein is abnormally distributed and overexpressed. PBC eventually leads to cirrhosis and liver failure. Alternative splicing results in multiple transcript variants encoding distinct isoforms.[provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10962254).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APIP	NM_015957.4	c.26G>C	p.Gly9Ala	missense_variant	Exon 1 of 7	ENST00000395787.4	NP_057041.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APIP	ENST00000395787.4	c.26G>C	p.Gly9Ala	missense_variant	Exon 1 of 7	1	NM_015957.4	ENSP00000379133.3

Frequencies

GnomAD3 genomes Cov.: 36

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460244 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 726380

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 36

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 03, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.26G>C (p.G9A) alteration is located in exon 1 (coding exon 1) of the APIP gene. This alteration results from a G to C substitution at nucleotide position 26, causing the glycine (G) at amino acid position 9 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	19
DANN	Benign	0.96
DEOGEN2	Benign	0.0053	T
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.29
FATHMM_MKL	Benign	0.42	N
LIST_S2	Benign	0.55	T
M_CAP	Benign	0.059	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.90	L
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	0.40	N
REVEL	Benign	0.087
Sift	Benign	0.062	T
Sift4G	Uncertain	0.020	D
Polyphen		0.48	P
Vest4		0.36
MutPred		0.22		Gain of sheet (P = 0.0477);
MVP		0.31
MPC		0.34
ClinPred		0.50	D
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.041
gMVP		0.34

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-34937806;