1-231241424-ACCAGTC-A

Position:

• chr1-231241424-ACCAGTC-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4

The NM_014236.4(GNPAT):​c.51_56del​(p.Pro18_Ser19del) variant causes a inframe deletion change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GNPAT NM_014236.4 inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.28

Genes affected

GNPAT (HGNC:4416): (glyceronephosphate O-acyltransferase) This gene encodes an enzyme located in the peroxisomal membrane which is essential to the synthesis of ether phospholipids. Mutations in this gene are associated with rhizomelic chondrodysplasia punctata. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_014236.4.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GNPAT	NM_014236.4	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/16	ENST00000366647.9
GNPAT	NM_001316350.2	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/15
GNPAT	XM_005273313.5	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GNPAT	ENST00000366647.9	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/16	1	NM_014236.4	P1
GNPAT	ENST00000416000.1	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/13	5
GNPAT	ENST00000436239.5	c.51_56del	p.Pro18_Ser19del	inframe_deletion	1/6	3
GNPAT	ENST00000644483.1	c.51_56del	p.Pro18_Ser19del	inframe_deletion, NMD_transcript_variant	1/17

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2021

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant has not been reported in the literature in individuals with GNPAT-related conditions. This variant is not present in population databases (ExAC no frequency). This variant, c.51_56del, results in the deletion of 2 amino acid(s) of the GNPAT protein (p.Pro18_Ser19del), but otherwise preserves the integrity of the reading frame. -

Computational scores

Source: dbNSFP v4.3

Splicing

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: chr1-231377170;