8-19954222-G-C

Variant names:

• chr8-19954222-G-C
• rs118204057
• NM_000237.3:c.644G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate

The NM_000237.3(LPL):​c.644G>C​(p.Gly215Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G215E) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LPL NM_000237.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.48
• Publications: 49 publications found

Genes affected

LPL (HGNC:6677): (lipoprotein lipase) LPL encodes lipoprotein lipase, which is expressed in heart, muscle, and adipose tissue. LPL functions as a homodimer, and has the dual functions of triglyceride hydrolase and ligand/bridging factor for receptor-mediated lipoprotein uptake. Severe mutations that cause LPL deficiency result in type I hyperlipoproteinemia, while less extreme mutations in LPL are linked to many disorders of lipoprotein metabolism. [provided by RefSeq, Jul 2008]

LPL Gene-Disease associations (from GenCC):

• familial lipoprotein lipase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Laboratory for Molecular Medicine, Ambry Genetics
• hyperlipidemia, familial combined, LPL related

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 8 uncertain in NM_000237.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr8-19954222-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 1522.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 52 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. Trascript score misZ: -0.36753 (below the threshold of 3.09). GenCC associations: The gene is linked to familial lipoprotein lipase deficiency, hyperlipidemia, familial combined, LPL related.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.851

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000237.3. 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
	LPL	NM_000237.3	MANE Select	c.644G>C	p.Gly215Ala	missense	Exon 5 of 10	NP_000228.1	P06858

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LPL	ENST00000650287.1	MANE Select	c.644G>C	p.Gly215Ala	missense	Exon 5 of 10	ENSP00000497642.1	P06858
	LPL	ENST00000965928.1		c.644G>C	p.Gly215Ala	missense	Exon 7 of 12	ENSP00000635987.1
	LPL	ENST00000965929.1		c.641G>C	p.Gly214Ala	missense	Exon 5 of 10	ENSP00000635988.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.16
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D
Eigen	Pathogenic	0.72
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.85	D
MetaSVM	Pathogenic	0.83	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		9.5
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-2.3	N
REVEL	Pathogenic	0.70
Sift	Benign	0.15	T
Sift4G	Benign	0.37	T
Polyphen		1.0	D
Vest4		0.82
MutPred		0.54		Loss of relative solvent accessibility (P = 0.0676)
MVP		1.0
MPC		0.46
ClinPred		0.95	D
GERP RS		5.3
Varity_R		0.46
gMVP		0.87

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: rs118204057; hg19: chr8-19811733;