chr11-45909945-C-G

Variant names:

• chr11-45909945-C-G
• rs886048325
• NM_004813.4:c.*309G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_004813.4(PEX16):​c.*309G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000254 in 751,284 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00023 (0 hom., cov: 34)
  • Exomes 𝑓: 0.00026 (0 hom.)
• Consequence: PEX16 NM_004813.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.25
• Publications: 0 publications found

Genes affected

PEX16 (HGNC:8857): (peroxisomal biogenesis factor 16) The protein encoded by this gene is an integral peroxisomal membrane protein. An inactivating nonsense mutation localized to this gene was observed in a patient with Zellweger syndrome of the complementation group CGD/CG9. Expression of this gene product morphologically and biochemically restores the formation of new peroxisomes, suggesting a role in peroxisome organization and biogenesis. Alternative splicing has been observed for this gene and two variants have been described. [provided by RefSeq, Jul 2008]

PEX16 Gene-Disease associations (from GenCC):

• peroxisome biogenesis disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• peroxisome biogenesis disorder 8A (Zellweger)

  Inheritance: AR Classification: DEFINITIVE, MODERATE Submitted by: G2P, Ambry Genetics
• peroxisome biogenesis disorder 8B

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• Zellweger spectrum disorders

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PEX16	NM_004813.4	c.*309G>C		3_prime_UTR_variant	Exon 11 of 11	ENST00000378750.10	NP_004804.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PEX16	ENST00000378750.10	c.*309G>C		3_prime_UTR_variant	Exon 11 of 11	1	NM_004813.4	ENSP00000368024.5
PEX16	ENST00000241041.7	c.*144G>C		3_prime_UTR_variant	Exon 11 of 11	1		ENSP00000241041.3
PEX16	ENST00000523721.2	n.*225G>C		downstream_gene_variant		5

Frequencies

GnomAD3 genomes AF: 0.000230 AC: 35 AN: 152228 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00778

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000260 AC: 156 AN: 599056 Hom.: 0 Cov.: 8 AF XY: 0.000264 AC XY: 84 AN XY: 318536

African (AFR) AF: 0.00 AC: 0 AN: 16958

American (AMR) AF: 0.00 AC: 0 AN: 34630

Ashkenazi Jewish (ASJ) AF: 0.00725 AC: 132 AN: 18206

East Asian (EAS) AF: 0.00 AC: 0 AN: 33206

South Asian (SAS) AF: 0.00 AC: 0 AN: 59874

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33702

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2404

European-Non Finnish (NFE) AF: 0.0000326 AC: 12 AN: 368148

Other (OTH) AF: 0.000376 AC: 12 AN: 31928

GnomAD4 genome AF: 0.000230 AC: 35 AN: 152228 Hom.: 0 Cov.: 34 AF XY: 0.000215 AC XY: 16 AN XY: 74368

African (AFR) AF: 0.0000241 AC: 1 AN: 41464

American (AMR) AF: 0.00 AC: 0 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00778 AC: 27 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000103 AC: 7 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.000212

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Peroxisome biogenesis disorder 8A (Zellweger) Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	1.2
DANN	Benign	0.45
PhyloP100		-1.2
Mutation Taster		=100/0	polymorphism

Splicing

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

Other links and lift over

dbSNP: rs886048325; hg19: chr11-45931496;