NM_003483.6:c.193C>T

Variant names:

• chr12-65828082-C-T
• rs1114167319
• NM_003483.6:c.193C>T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_003483.6(HMGA2):​c.193C>T​(p.Gln65*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HMGA2 NM_003483.6 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:3
• Conservation: PhyloP100: 6.25
• Publications: 1 publications found

Genes affected

HMGA2 (HGNC:5009): (high mobility group AT-hook 2) This gene encodes a protein that belongs to the non-histone chromosomal high mobility group (HMG) protein family. HMG proteins function as architectural factors and are essential components of the enhancesome. This protein contains structural DNA-binding domains and may act as a transcriptional regulating factor. Identification of the deletion, amplification, and rearrangement of this gene that are associated with myxoid liposarcoma suggests a role in adipogenesis and mesenchymal differentiation. A gene knock out study of the mouse counterpart demonstrated that this gene is involved in diet-induced obesity. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

HMGA2 Gene-Disease associations (from GenCC):

• Silver-Russell syndrome 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• uterine corpus leiomyoma

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-65828082-C-T is Pathogenic according to our data. Variant chr12-65828082-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 253034.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003483.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HMGA2	NM_003483.6	MANE Select	c.193C>T	p.Gln65*	stop_gained	Exon 2 of 5	NP_003474.1
	HMGA2	NM_001300919.1		c.193C>T	p.Gln65*	stop_gained	Exon 2 of 4	NP_001287848.1
	HMGA2	NM_001300918.1		c.193C>T	p.Gln65*	stop_gained	Exon 2 of 5	NP_001287847.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HMGA2	ENST00000403681.7	TSL:1 MANE Select	c.193C>T	p.Gln65*	stop_gained	Exon 2 of 5	ENSP00000384026.2
	HMGA2	ENST00000536545.5	TSL:1	c.193C>T	p.Gln65*	stop_gained	Exon 2 of 4	ENSP00000437621.1
	HMGA2	ENST00000354636.7	TSL:1	c.193C>T	p.Gln65*	stop_gained	Exon 2 of 4	ENSP00000346658.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (1)
1	-	-	Silver-Russell syndrome 1 (1)
1	-	-	Silver-Russell syndrome 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	38
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Uncertain	0.89	D
PhyloP100		6.2
Vest4		0.94
GERP RS		5.2
Mutation Taster		=9/191	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1114167319; hg19: chr12-66221862;