rs797045100

Variant names:

• chr10-13283750-AAC-A
• rs797045100
• NM_006214.4:c.766_767delGT

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_006214.4(PHYH):​c.766_767delGT​(p.Val256PhefsTer14) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PHYH NM_006214.4 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.21
• Publications: 0 publications found

Genes affected

PHYH (HGNC:8940): (phytanoyl-CoA 2-hydroxylase) This gene is a member of the PhyH family and encodes a peroxisomal protein that is involved in the alpha-oxidation of 3-methyl branched fatty acids. Specifically, this protein converts phytanoyl-CoA to 2-hydroxyphytanoyl-CoA. Mutations in this gene have been associated with Refsum disease (RD) and deficient protein activity has been associated with Zellweger syndrome and rhizomelic chondrodysplasia punctata. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

PHYH Gene-Disease associations (from GenCC):

• adult Refsum disease

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, G2P, Orphanet
• phytanoyl-CoA hydroxylase deficiency

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-13283750-AAC-A is Pathogenic according to our data. Variant chr10-13283750-AAC-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 208603.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006214.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHYH	NM_006214.4	MANE Select	c.766_767delGT	p.Val256PhefsTer14	frameshift	Exon 7 of 9	NP_006205.1
	PHYH	NM_001323082.2		c.772_773delGT	p.Val258PhefsTer14	frameshift	Exon 7 of 9	NP_001310011.1
	PHYH	NM_001323083.2		c.502_503delGT	p.Val168PhefsTer14	frameshift	Exon 5 of 7	NP_001310012.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHYH	ENST00000263038.9	TSL:1 MANE Select	c.766_767delGT	p.Val256PhefsTer14	frameshift	Exon 7 of 9	ENSP00000263038.4
	PHYH	ENST00000396920.7	TSL:5	c.715_716delGT	p.Val239PhefsTer14	frameshift	Exon 7 of 9	ENSP00000380126.3
	PHYH	ENST00000396913.6	TSL:5	c.466_467delGT	p.Val156PhefsTer14	frameshift	Exon 6 of 8	ENSP00000380121.2

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Phytanic acid storage disease (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.2

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

Other links and lift over

dbSNP: rs797045100; hg19: chr10-13325750;