NM_006147.4:c.5C>T

Variant names:

• chr1-209801409-G-A
• rs28942093
• NM_006147.4:c.5C>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP2 PP3 PP5

The NM_006147.4(IRF6):​c.5C>T​(p.Ala2Val) variant causes a missense change involving the alteration of a conserved nucleotide. 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 (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A2T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IRF6 NM_006147.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.41
• Publications: 5 publications found

Genes affected

IRF6 (HGNC:6121): (interferon regulatory factor 6) This gene encodes a member of the interferon regulatory transcription factor (IRF) family. Family members share a highly-conserved N-terminal helix-turn-helix DNA-binding domain and a less conserved C-terminal protein-binding domain. The encoded protein may be a transcriptional activator. Mutations in this gene can cause van der Woude syndrome and popliteal pterygium syndrome. Mutations in this gene are also associated with non-syndromic orofacial cleft type 6. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2011]

IRF6 Gene-Disease associations (from GenCC):

• autosomal dominant popliteal pterygium syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• IRF6-related condition

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• van der Woude syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• popliteal pterygium syndrome

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
• tooth agenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• van der Woude syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• orofacial cleft 6, susceptibility to

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

ENSG00000289700 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the IRF6 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 45 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. Gene score misZ: 2.7435 (below the threshold of 3.09). Trascript score misZ: 3.8897 (above the threshold of 3.09). GenCC associations: The gene is linked to van der Woude syndrome 1, van der Woude syndrome, autosomal dominant popliteal pterygium syndrome, orofacial cleft 6, susceptibility to, tooth agenesis, IRF6-related condition, popliteal pterygium syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.774
• PP5: Variant 1-209801409-G-A is Pathogenic according to our data. Variant chr1-209801409-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 3416.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006147.4. 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
	IRF6	NM_006147.4	MANE Select	c.5C>T	p.Ala2Val	missense	Exon 3 of 9	NP_006138.1
	IRF6	NM_001206696.2		c.-112+4538C>T		intron	N/A	NP_001193625.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IRF6	ENST00000367021.8	TSL:1 MANE Select	c.5C>T	p.Ala2Val	missense	Exon 3 of 9	ENSP00000355988.3
	ENSG00000289700	ENST00000696133.1		c.5C>T	p.Ala2Val	missense	Exon 3 of 10	ENSP00000512426.1
	IRF6	ENST00000456314.1	TSL:3	c.5C>T	p.Ala2Val	missense	Exon 2 of 6	ENSP00000403855.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Van der Woude syndrome 1 Pathogenic:1

Oct 01, 2003

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.47
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.44	T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	D
M_CAP	Pathogenic	0.59	D
MetaRNN	Pathogenic	0.77	D
MetaSVM	Pathogenic	0.87	D
MutationAssessor	Benign	2.0	M
PhyloP100		7.4
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-2.1	N
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.017	D
Polyphen		0.94	P
Vest4		0.77
MutPred		0.41		Loss of loop (P = 0.1242)
MVP		0.98
MPC		1.6
ClinPred		0.90	D
GERP RS		5.3
Varity_R		0.17
gMVP		0.61
Mutation Taster		=24/76	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs28942093; hg19: chr1-209974754; COSMIC: COSV65420110;