rs1555248025

Variant names:

• chr12-116009071-C-CTGGT
• rs1555248025
• NM_015335.5:c.1338_1341dupACCA

Variant summary

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

The NM_015335.5(MED13L):​c.1338_1341dupACCA​(p.Gly448ThrfsTer20) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MED13L NM_015335.5 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.138
• Publications: 0 publications found

Genes affected

MED13L (HGNC:22962): (mediator complex subunit 13L) The protein encoded by this gene is a subunit of the Mediator complex, a large complex of proteins that functions as a transcriptional coactivator for most RNA polymerase II-transcribed genes. The encoded protein is involved in early development of the heart and brain. Defects in this gene are a cause of transposition of the great arteries, dextro-looped (DTGA).[provided by RefSeq, Jul 2010]

MED13L Gene-Disease associations (from GenCC):

• cardiac anomalies - developmental delay - facial dysmorphism syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Illumina, Labcorp Genetics (formerly Invitae), G2P
• syndromic intellectual disability

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

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 12-116009071-C-CTGGT is Pathogenic according to our data. Variant chr12-116009071-C-CTGGT is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 559867.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015335.5. 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
	MED13L	NM_015335.5	MANE Select	c.1338_1341dupACCA	p.Gly448ThrfsTer20	frameshift	Exon 10 of 31	NP_056150.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MED13L	ENST00000281928.9	TSL:1 MANE Select	c.1338_1341dupACCA	p.Gly448ThrfsTer20	frameshift	Exon 10 of 31	ENSP00000281928.3
	MED13L	ENST00000650226.1		c.1338_1341dupACCA	p.Gly448ThrfsTer20	frameshift	Exon 10 of 31	ENSP00000496981.1
	MED13L	ENST00000549786.2	TSL:2	c.765_768dupACCA	p.Gly257fs	frameshift	Exon 6 of 18	ENSP00000446782.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Cardiac anomalies - developmental delay - facial dysmorphism syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.14

Splicing

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

Other links and lift over

dbSNP: rs1555248025; hg19: chr12-116446876;