2-11677692-G-A

Position:

• chr2-11677692-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_001261428.3(LPIN1):​c.45G>A​(p.Ser15=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0011 in 1,535,712 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0053 (5 hom., cov: 33)
  • Exomes 𝑓: 0.00064 (8 hom.)
• Consequence: LPIN1 NM_001261428.3 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -3.09

Genes affected

LPIN1 (HGNC:13345): (lipin 1) This gene encodes a magnesium-ion-dependent phosphatidic acid phosphohydrolase enzyme that catalyzes the penultimate step in triglyceride synthesis including the dephosphorylation of phosphatidic acid to yield diacylglycerol. Expression of this gene is required for adipocyte differentiation and it also functions as a nuclear transcriptional coactivator with some peroxisome proliferator-activated receptors to modulate expression of other genes involved in lipid metabolism. Mutations in this gene are associated with metabolic syndrome, type 2 diabetes, acute recurrent rhabdomyolysis, and autosomal recessive acute recurrent myoglobinuria (ARARM). This gene is also a candidate for several human lipodystrophy syndromes. [provided by RefSeq, Mar 2017]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 2-11677692-G-A is Benign according to our data. Variant chr2-11677692-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1179725.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0053 (808/152332) while in subpopulation AFR AF= 0.0185 (769/41574). AF 95% confidence interval is 0.0174. There are 5 homozygotes in gnomad4. There are 401 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 5 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LPIN1	NM_001261428.3	c.45G>A	p.Ser15=	synonymous_variant	1/22		NP_001248357.1
LPIN1	NM_001349207.2	c.45G>A	p.Ser15=	synonymous_variant	1/21		NP_001336136.1
LPIN1	NM_001349208.2	c.45G>A	p.Ser15=	synonymous_variant	1/21		NP_001336137.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LPIN1	ENST00000449576.6	c.45G>A	p.Ser15=	synonymous_variant	1/22	2		ENSP00000397908	A2

Frequencies

GnomAD3 genomes AF: 0.00531 AC: 808 AN: 152214 Hom.: 5 Cov.: 33

Gnomad AFR AF: 0.0185

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00164

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.00120 AC: 154 AN: 128402 Hom.: 1 AF XY: 0.000910 AC XY: 64 AN XY: 70322

Gnomad AFR exome AF: 0.0207

Gnomad AMR exome AF: 0.000945

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000629

Gnomad OTH exome AF: 0.000499

GnomAD4 exome AF: 0.000637 AC: 881 AN: 1383380 Hom.: 8 Cov.: 33 AF XY: 0.000571 AC XY: 390 AN XY: 682600

Gnomad4 AFR exome AF: 0.0212

Gnomad4 AMR exome AF: 0.000784

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000631

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000890

Gnomad4 OTH exome AF: 0.00135

GnomAD4 genome AF: 0.00530 AC: 808 AN: 152332 Hom.: 5 Cov.: 33 AF XY: 0.00538 AC XY: 401 AN XY: 74492

Gnomad4 AFR AF: 0.0185

Gnomad4 AMR AF: 0.00163

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.00284

Alfa AF: 0.00380 Hom.: 1

Bravo AF: 0.00643

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Myoglobinuria, acute recurrent, autosomal recessive Benign:2

Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 10, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jul 23, 2021	- -

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 05, 2018	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

LPIN1-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 06, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	0.33
DANN	Benign	0.88

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs145228255; hg19: chr2-11817818;