9-136677540-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_006412.4(AGPAT2):c.199G>A(p.Val67Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000638 in 1,612,802 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00034 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00067 ( 13 hom. )

Consequence

AGPAT2
NM_006412.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2O:1

Conservation

PhyloP100: 2.47

Variant links:

Genes affected

AGPAT2 (HGNC:325): (1-acylglycerol-3-phosphate O-acyltransferase 2) This gene encodes a member of the 1-acylglycerol-3-phosphate O-acyltransferase family. The protein is located within the endoplasmic reticulum membrane and converts lysophosphatidic acid to phosphatidic acid, the second step in de novo phospholipid biosynthesis. Mutations in this gene have been associated with congenital generalized lipodystrophy (CGL), or Berardinelli-Seip syndrome, a disease characterized by a near absence of adipose tissue and severe insulin resistance. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

AGPAT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010866374).

BP6

Variant 9-136677540-C-T is Benign according to our data. Variant chr9-136677540-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 393427.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2, Benign=1, Uncertain_risk_allele=1}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000341 (52/152348) while in subpopulation SAS AF= 0.00994 (48/4828). AF 95% confidence interval is 0.0077. There are 1 homozygotes in gnomad4. There are 33 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 13 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGPAT2	NM_006412.4 link	c.199G>A	p.Val67Met	missense_variant	Exon 2 of 6	ENST00000371696.7	NP_006403.2	O15120-1A0A024R8I7
AGPAT2	XM_047422636.1 link	c.-111G>A		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 6		XP_047278592.1
AGPAT2	NM_001012727.2 link	c.199G>A	p.Val67Met	missense_variant	Exon 2 of 5		NP_001012745.1	O15120-2A0A024R8F9
AGPAT2	XM_047422636.1 link	c.-111G>A		5_prime_UTR_variant	Exon 2 of 6		XP_047278592.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
AGPAT2	ENST00000371696.7 link	c.199G>A	p.Val67Met	missense_variant	Exon 2 of 6	1	NM_006412.4	ENSP00000360761.2	O15120-1
AGPAT2	ENST00000371694.7 link	c.199G>A	p.Val67Met	missense_variant	Exon 2 of 5	1		ENSP00000360759.3	O15120-2
AGPAT2	ENST00000470861.1 link	n.207G>A		non_coding_transcript_exon_variant	Exon 2 of 2	2
AGPAT2	ENST00000472820.1 link	n.-160G>A		upstream_gene_variant		1

Frequencies

GnomAD3 genomes

AF:

0.000342

AC:

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00993

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00145

AC:

357

AN:

246188

Hom.:

AF XY:

0.00181

AC XY:

243

AN XY:

134312

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0112

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000182

Gnomad OTH exome

AF:

0.00116

GnomAD4 exome

AF:

0.000669

AC:

977

AN:

1460454

Hom.:

Cov.:

AF XY:

0.000939

AC XY:

682

AN XY:

726546

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0105

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000144

Gnomad4 OTH exome

AF:

0.000762

GnomAD4 genome

AF:

0.000341

AC:

AN:

152348

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74492

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00994

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000855

Hom.:

Bravo

AF:

0.0000831

ExAC

AF:

0.00171

AC:

207

Asia WGS

AF:

0.00520

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Oct 22, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine with methionine at codon 67 of the AGPAT2 protein (p.Val67Met). The valine residue is moderately conserved and there is a small physicochemical difference between valine and methionine. This variant is present in population databases (rs563539429, ExAC 1.2%), including at least one homozygous and/or hemizygous individual. This variant has been observed in individual(s) with features of lipodystrophy (PMID: 22831748, 30319454). ClinVar contains an entry for this variant (Variation ID: 393427). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Jan 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

AGPAT2: BS1, BS2 -

Congenital generalized lipodystrophy type 1

Uncertain:1Other:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic

Significance: Uncertain risk allele

Review Status: criteria provided, single submitter

Collection Method: research

Potent mutations in AGPAT2 gene are associated with Congenital generalized lipodystrophy, type 1, which can present with insulin resistance, fatty liver and diabetes. rs563539429 variant is associated with Partial Lipodystrophy. However, more studies are required to ascertain the role of rs563539429 in Partial Lipodystrophy. -

Monogenic diabetes

Benign:1

Jul 19, 2016

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: research

ACMG Criteria: PP3, BS2 (ExAC), BP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.54

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.12

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

.;T;T

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.31

FATHMM_MKL

Benign

0.70

LIST_S2

Benign

0.83

T;.;T

MetaRNN

Benign

0.011

T;T;T

MetaSVM

Uncertain

0.0026

MutationAssessor

Uncertain

2.1

M;M;M

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-1.3

N;N;N

REVEL

Uncertain

0.42

Sift

Benign

0.14

T;T;T

Sift4G

Benign

0.084

T;T;T

Polyphen

0.78

P;P;P

Vest4

0.70

MutPred

0.46

Gain of MoRF binding (P = 0.1233);Gain of MoRF binding (P = 0.1233);Gain of MoRF binding (P = 0.1233);

MVP

0.90

MPC

0.27

ClinPred

0.044

GERP RS

1.6

Varity_R

0.034

gMVP

0.75

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over