Genetic Variant IRF6:c.175-5C>A (chr1-209796557-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006147.4(IRF6):c.175-5C>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,266 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

IRF6
NM_006147.4 splice_region, intron

Scores

Splicing: ADA: 0.0005050

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.33

Publications

0 publications found

Variant links:

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)

IRF6 links:

ENSG00000289700 (HGNC:):

ENSG00000289700 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IRF6	NM_006147.4 link	c.175-5C>A		splice_region_variant, intron_variant	Intron 3 of 8	ENST00000367021.8	NP_006138.1
IRF6	NM_001206696.2 link	c.-111-5C>A		splice_region_variant, intron_variant	Intron 1 of 6		NP_001193625.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IRF6	ENST00000367021.8 link	c.175-5C>A		splice_region_variant, intron_variant	Intron 3 of 8	1	NM_006147.4	ENSP00000355988.3
ENSG00000289700	ENST00000696133.1 link	c.175-5C>A		splice_region_variant, intron_variant	Intron 3 of 9			ENSP00000512426.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725976

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33420

American (AMR)

AF:

0.00

AC:

AN:

44676

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26116

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86134

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53264

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4448

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111326

Other (OTH)

AF:

0.00

AC:

AN:

60200

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

(source)

DANN

Benign

0.60

PhyloP100

1.3

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00051

dbscSNV1_RF

Benign

0.050

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over