NM_033419.5:c.852T>C

Variant names:

• chr17-39673098-A-G
• rs766460118
• NM_033419.5:c.852T>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_033419.5(PGAP3):​c.852T>C​(p.His284His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000373 in 1,609,420 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 Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PGAP3 NM_033419.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -3.35
• Publications: 1 publications found

Genes affected

PGAP3 (HGNC:23719): (post-GPI attachment to proteins phospholipase 3) This gene encodes a glycosylphosphatidylinositol (GPI)-specific phospholipase that primarily localizes to the Golgi apparatus. This ubiquitously expressed gene is predicted to encode a seven-transmembrane protein that removes unsaturated fatty acids from the sn-2 position of GPI. The remodeling of the constituent fatty acids on GPI is thought to be important for the proper association between GPI-anchored proteins and lipid rafts. The tethering of proteins to plasma membranes via posttranslational GPI-anchoring is thought to play a role in protein sorting and trafficking. Mutations in this gene cause an autosomal recessive form of neurologic hyperphosphatasia with cognitive disability (HPMRS4). Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2017]

PGAP3 Gene-Disease associations (from GenCC):

• hyperphosphatasia with intellectual disability syndrome 4

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P
• hyperphosphatasia-intellectual disability syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 17-39673098-A-G is Benign according to our data. Variant chr17-39673098-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 3682097.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-3.35 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033419.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PGAP3	NM_033419.5	MANE Select	c.852T>C	p.His284His	synonymous	Exon 7 of 8	NP_219487.3
	PGAP3	NM_001291728.2		c.789T>C	p.His263His	synonymous	Exon 6 of 7	NP_001278657.1	Q96FM1-3
	PGAP3	NM_001291726.2		c.699T>C	p.His233His	synonymous	Exon 6 of 7	NP_001278655.1	Q96FM1-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PGAP3	ENST00000300658.9	TSL:1 MANE Select	c.852T>C	p.His284His	synonymous	Exon 7 of 8	ENSP00000300658.4	Q96FM1-1
	PGAP3	ENST00000429199.6	TSL:2	c.789T>C	p.His263His	synonymous	Exon 6 of 7	ENSP00000415765.2	Q96FM1-3
	PGAP3	ENST00000378011.8	TSL:2	c.699T>C	p.His233His	synonymous	Exon 6 of 7	ENSP00000367250.4	Q96FM1-2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152194 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000415 AC: 10 AN: 240852 AF XY: 0.0000154

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000505

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000915

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000343 AC: 5 AN: 1457226 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 724388

African (AFR) AF: 0.00 AC: 0 AN: 33460

American (AMR) AF: 0.00 AC: 0 AN: 43806

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25946

East Asian (EAS) AF: 0.000101 AC: 4 AN: 39524

South Asian (SAS) AF: 0.00 AC: 0 AN: 85054

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53096

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1110302

Other (OTH) AF: 0.00 AC: 0 AN: 60270

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152194 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74356

African (AFR) AF: 0.00 AC: 0 AN: 41446

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

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68018

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

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.067
DANN	Benign	0.59
PhyloP100		-3.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs766460118; hg19: chr17-37829351;