1-209796477-G-C

Variant names:

• chr1-209796477-G-C
• rs121434226
• NM_006147.4:c.250C>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Strong

The NM_006147.4(IRF6):​c.250C>G​(p.Arg84Gly) variant causes a missense 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 not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R84P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IRF6 NM_006147.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 5.15
• Publications: 1 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: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 9 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_006147.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-209796476-C-A is described in ClinVar as Pathogenic. ClinVar VariationId is 30653.Status of the report is no_assertion_criteria_provided, 0 stars.
• 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, 0.994

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IRF6	NM_006147.4	c.250C>G	p.Arg84Gly	missense_variant	Exon 4 of 9	ENST00000367021.8	NP_006138.1
IRF6	NM_001206696.2	c.-36C>G		5_prime_UTR_variant	Exon 2 of 7		NP_001193625.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IRF6	ENST00000367021.8	c.250C>G	p.Arg84Gly	missense_variant	Exon 4 of 9	1	NM_006147.4	ENSP00000355988.3
ENSG00000289700	ENST00000696133.1	c.250C>G	p.Arg84Gly	missense_variant	Exon 4 of 10			ENSP00000512426.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Van der Woude syndrome 1 Other:1

-

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Seen only in persons with Van der Woude syndrome -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D;D
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Pathogenic	0.91	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.1	H;.
PhyloP100		5.1
PrimateAI	Pathogenic	0.80	T
PROVEAN	Pathogenic	-6.3	D;D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;.
Polyphen		1.0	D;.
Vest4		0.99
MutPred		0.97		Loss of MoRF binding (P = 0.0077);Loss of MoRF binding (P = 0.0077);
MVP		1.0
MPC		2.6
ClinPred		1.0	D
GERP RS		4.7
Varity_R		0.96
gMVP		0.96
Mutation Taster		=5/95	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs121434226; hg19: chr1-209969822;