chr11-34916137-C-A

Position:

• chr11-34916137-C-A

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS2

The NM_015957.4(APIP):​c.57+91G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00169 in 1,510,264 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0014 (1 hom., cov: 34)
  • Exomes 𝑓: 0.0017 (4 hom.)
• Consequence: APIP NM_015957.4 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.465

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 Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP6: Variant 11-34916137-C-A is Benign according to our data. Variant chr11-34916137-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 880153.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
APIP	NM_015957.4	c.57+91G>T		intron_variant		ENST00000395787.4	NP_057041.2
APIP	XM_011520154.4	c.13+91G>T		intron_variant			XP_011518456.1
PDHX	XM_011520390.2	c.-21+199C>A		intron_variant			XP_011518692.1
APIP	XM_017017875.3	c.-301+91G>T		intron_variant			XP_016873364.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
APIP	ENST00000395787.4	c.57+91G>T		intron_variant		1	NM_015957.4	ENSP00000379133	P1
PDHX	ENST00000448838.8	c.-370C>A		5_prime_UTR_variant	1/11	5		ENSP00000389404
PDHX	ENST00000533550.5	c.-21+199C>A		intron_variant		4		ENSP00000431281
APIP	ENST00000527830.1	n.124+91G>T		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes AF: 0.00137 AC: 209 AN: 152236 Hom.: 1 Cov.: 34

Gnomad AFR AF: 0.000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00477

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000377

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00175

Gnomad OTH AF: 0.00143

GnomAD4 exome AF: 0.00173 AC: 2347 AN: 1357910 Hom.: 4 Cov.: 25 AF XY: 0.00169 AC XY: 1134 AN XY: 670884

Gnomad4 AFR exome AF: 0.000168

Gnomad4 AMR exome AF: 0.00170

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000129

Gnomad4 FIN exome AF: 0.000484

Gnomad4 NFE exome AF: 0.00205

Gnomad4 OTH exome AF: 0.00175

GnomAD4 genome AF: 0.00137 AC: 209 AN: 152354 Hom.: 1 Cov.: 34 AF XY: 0.00144 AC XY: 107 AN XY: 74504

Gnomad4 AFR AF: 0.000240

Gnomad4 AMR AF: 0.00477

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000377

Gnomad4 NFE AF: 0.00175

Gnomad4 OTH AF: 0.00142

Bravo AF: 0.00128

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pyruvate dehydrogenase E3-binding protein deficiency Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	2.1
DANN	Benign	0.75
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

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: rs561463212; hg19: chr11-34937684;