chr8-19939265-T-TCC

Position:

• chr8-19939265-T-TCC

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP6 BS1 BS2

The NM_000237.3(LPL):​c.-172_-171dup variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00245 in 616,782 control chromosomes in the GnomAD database, including 16 homozygotes. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0071 (10 hom., cov: 32)
  • Exomes 𝑓: 0.00091 (6 hom.)
• Consequence: LPL NM_000237.3 5_prime_UTR
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: -0.0180

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]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP6: Variant 8-19939265-T-TCC is Benign according to our data. Variant chr8-19939265-T-TCC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 362400.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1, Benign=1}.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00714 (1087/152202) while in subpopulation AFR AF= 0.0251 (1044/41518). AF 95% confidence interval is 0.0239. There are 10 homozygotes in gnomad4. There are 490 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 10 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LPL	NM_000237.3	c.-172_-171dup		5_prime_UTR_variant	1/10	ENST00000650287.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LPL	ENST00000650287.1	c.-172_-171dup		5_prime_UTR_variant	1/10		NM_000237.3	P1

Frequencies

GnomAD3 genomes AF: 0.00713 AC: 1084 AN: 152084 Hom.: 10 Cov.: 32

Gnomad AFR AF: 0.0251

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00223

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00239

GnomAD4 exome AF: 0.000908 AC: 422 AN: 464580 Hom.: 6 Cov.: 4 AF XY: 0.000721 AC XY: 177 AN XY: 245556

Gnomad4 AFR exome AF: 0.0247

Gnomad4 AMR exome AF: 0.00157

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000837

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000397

Gnomad4 OTH exome AF: 0.00179

GnomAD4 genome AF: 0.00714 AC: 1087 AN: 152202 Hom.: 10 Cov.: 32 AF XY: 0.00659 AC XY: 490 AN XY: 74408

Gnomad4 AFR AF: 0.0251

Gnomad4 AMR AF: 0.00222

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00236

Alfa AF: 0.00527 Hom.: 1

Bravo AF: 0.00806

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Sep 21, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Feb 29, 2020	- -

Hyperlipoproteinemia, type I Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs146978295; hg19: chr8-19796776;