4-127633093-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_015693.4(INTU):c.59C>T(p.Pro20Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000805 in 1,613,968 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P20A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: INTU NM_015693.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.00700

Genes affected

INTU (HGNC:29239): (inturned planar cell polarity protein) Involved in embryonic digit morphogenesis; roof of mouth development; and tongue morphogenesis. Located in ciliary basal body and motile cilium. Implicated in asphyxiating thoracic dystrophy and orofaciodigital syndrome XVII. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.023162186).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
INTU	NM_015693.4	c.59C>T	p.Pro20Leu	missense_variant	1/16	ENST00000335251.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
INTU	ENST00000335251.11	c.59C>T	p.Pro20Leu	missense_variant	1/16	1	NM_015693.4	P1
INTU	ENST00000503952.5	c.59C>T	p.Pro20Leu	missense_variant, NMD_transcript_variant	1/17	1
INTU	ENST00000504491.1	c.89+9602C>T		intron_variant		4
INTU	ENST00000503626.5	c.59C>T	p.Pro20Leu	missense_variant, NMD_transcript_variant	1/18	2

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152168 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000159 AC: 4 AN: 251364 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135856

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461682 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 727146

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000720

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152286 Hom.: 0 Cov.: 32 AF XY: 0.0000537 AC XY: 4 AN XY: 74470

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000108 Hom.: 0

Bravo AF: 0.0000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 22, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with INTU-related conditions. This variant is present in population databases (rs187348525, gnomAD 0.003%). This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 20 of the INTU protein (p.Pro20Leu). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.69
Cadd	Benign	7.9
Dann	Benign	0.86
DEOGEN2	Benign	0.15	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.026	N
LIST_S2	Benign	0.65	T
M_CAP	Benign	0.0015	T
MetaRNN	Benign	0.023	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.37	T
PROVEAN	Benign	0.80	N
REVEL	Benign	0.092
Sift	Benign	1.0	T
Sift4G	Benign	0.55	T
Polyphen		0.0	B
Vest4		0.11
MVP		0.15
MPC		0.11
ClinPred		0.045	T
GERP RS		0.26
Varity_R		0.020
gMVP		0.13

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

Publications

LitVar

Other links and lift over

dbSNP: rs187348525; hg19: chr4-128554248;