9-136673887-GCT-CGA

Variant names:

• chr9-136673887-GCT-CGA
• NM_006412.4:c.700_702delAGCinsTCG
• AGPAT2 p.235

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP7

The NM_006412.4(AGPAT2):​c.700_702delAGCinsTCG​(p.235) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S234S) has been classified as Benign.

• Frequency: Genomes: not found (cov: 34)
• Consequence: AGPAT2 NM_006412.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.198
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• congenital generalized lipodystrophy type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• lipodystrophy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Berardinelli-Seip congenital lipodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• neonatal diabetes mellitus

  Inheritance: AR Classification: LIMITED Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• BP7: Synonymous conserved (PhyloP=-0.198 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006412.4. 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
	AGPAT2	NM_006412.4	MANE Select	c.700_702delAGCinsTCG	p.235	synonymous	N/A	NP_006403.2
	AGPAT2	NM_001012727.2		c.604_606delAGCinsTCG	p.203	synonymous	N/A	NP_001012745.1	O15120-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGPAT2	ENST00000371696.7	TSL:1 MANE Select	c.700_702delAGCinsTCG	p.235	synonymous	N/A	ENSP00000360761.2	O15120-1
	AGPAT2	ENST00000371694.7	TSL:1	c.604_606delAGCinsTCG	p.203	synonymous	N/A	ENSP00000360759.3	O15120-2
	AGPAT2	ENST00000472820.1	TSL:1	n.628_630delAGCinsTCG		non_coding_transcript_exon	Exon 4 of 4

Frequencies

GnomAD3 genomes Cov.: 34

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.20

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr9-139568339;