NM_000168.6:c.4395delC

Variant names:

• chr7-41964677-TG-T
• rs1554304380
• NM_000168.6:c.4395delC

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_000168.6(GLI3):​c.4395delC​(p.Ser1466AlafsTer22) 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 Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GLI3 NM_000168.6 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.41

Genes affected

GLI3 (HGNC:4319): (GLI family zinc finger 3) This gene encodes a protein which belongs to the C2H2-type zinc finger proteins subclass of the Gli family. They are characterized as DNA-binding transcription factors and are mediators of Sonic hedgehog (Shh) signaling. The protein encoded by this gene localizes in the cytoplasm and activates patched Drosophila homolog (PTCH) gene expression. It is also thought to play a role during embryogenesis. Mutations in this gene have been associated with several diseases, including Greig cephalopolysyndactyly syndrome, Pallister-Hall syndrome, preaxial polydactyly type IV, and postaxial polydactyly types A1 and B. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 4 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-41964677-TG-T is Pathogenic according to our data. Variant chr7-41964677-TG-T is described in ClinVar as [Pathogenic]. Clinvar id is 459213.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLI3	NM_000168.6	c.4395delC	p.Ser1466AlafsTer22	frameshift_variant	Exon 15 of 15	ENST00000395925.8	NP_000159.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GLI3	ENST00000395925.8	c.4395delC	p.Ser1466AlafsTer22	frameshift_variant	Exon 15 of 15	5	NM_000168.6	ENSP00000379258.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pallister-Hall syndrome;C0265306:Greig cephalopolysyndactyly syndrome Pathogenic:1

May 05, 2016

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. This sequence change deletes 1 nucleotide from exon 15 of the GLI3 mRNA (c.4395delC), causing a frameshift at codon 1466. This creates a premature translational stop signal in the last exon of the GLI3 mRNA (p.Ser1466Alafs*22). While this is not anticipated to result in nonsense mediated decay, it is expected to result in a truncated GLI3 protein. This variant has not been reported in the literature. However a pathogenic frameshift variant (p.Thr1488Lysfs*23) occurs downstream of this frameshift (PMID: 24736735), which indicates truncation of the 3' end of the GLI3 protein is deleterious. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs1554304380; hg19: chr7-42004275;