rs3208305

Variant names:

• chr8-19966137-A-T
• rs3208305
• NM_000237.3:c.*827A>T

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000237.3(LPL):​c.*827A>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.355 in 151,874 control chromosomes in the GnomAD database, including 10,561 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.35 (10561 hom., cov: 31)
  • Failed GnomAD Quality Control
• Consequence: LPL NM_000237.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -0.282
• Publications: 30 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: G2P, Laboratory for Molecular Medicine, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
• hyperlipidemia, familial combined, LPL related

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

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BP6: Variant 8-19966137-A-T is Benign according to our data. Variant chr8-19966137-A-T is described in ClinVar as Benign. ClinVar VariationId is 362430.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.519 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LPL	NM_000237.3	c.*827A>T		3_prime_UTR_variant	Exon 10 of 10	ENST00000650287.1	NP_000228.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LPL	ENST00000650287.1	c.*827A>T		3_prime_UTR_variant	Exon 10 of 10		NM_000237.3	ENSP00000497642.1
LPL	ENST00000650478.1	n.*1078A>T		non_coding_transcript_exon_variant	Exon 4 of 4			ENSP00000497560.1
LPL	ENST00000650478.1	n.*1078A>T		3_prime_UTR_variant	Exon 4 of 4			ENSP00000497560.1

Frequencies

GnomAD3 genomes AF: 0.355 AC: 53831 AN: 151758 Hom.: 10544 Cov.: 31

Gnomad AFR AF: 0.525

Gnomad AMI AF: 0.441

Gnomad AMR AF: 0.300

Gnomad ASJ AF: 0.435

Gnomad EAS AF: 0.204

Gnomad SAS AF: 0.246

Gnomad FIN AF: 0.259

Gnomad MID AF: 0.358

Gnomad NFE AF: 0.293

Gnomad OTH AF: 0.337

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AC: 0 AN: 0

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AC: 0 AN: 0

Other (OTH) AC: 0 AN: 0

GnomAD4 genome AF: 0.355 AC: 53890 AN: 151874 Hom.: 10561 Cov.: 31 AF XY: 0.350 AC XY: 25963 AN XY: 74200

African (AFR) AF: 0.525 AC: 21727 AN: 41402

American (AMR) AF: 0.299 AC: 4565 AN: 15248

Ashkenazi Jewish (ASJ) AF: 0.435 AC: 1509 AN: 3466

East Asian (EAS) AF: 0.203 AC: 1052 AN: 5174

South Asian (SAS) AF: 0.246 AC: 1188 AN: 4822

European-Finnish (FIN) AF: 0.259 AC: 2724 AN: 10504

Middle Eastern (MID) AF: 0.350 AC: 103 AN: 294

European-Non Finnish (NFE) AF: 0.293 AC: 19912 AN: 67952

Other (OTH) AF: 0.337 AC: 708 AN: 2100

Alfa AF: 0.324 Hom.: 1150

Bravo AF: 0.365

Asia WGS AF: 0.254 AC: 883 AN: 3472

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Apr 14, 2019

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hyperlipoproteinemia, type I Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.79
DANN	Benign	0.45
PhyloP100		-0.28

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: rs3208305; hg19: chr8-19823648;