chr16-54285408-C-G

Position:

• chr16-54285408-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_024336.3(IRX3):​c.473G>C​(p.Gly158Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IRX3 NM_024336.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.65

Genes affected

IRX3 (HGNC:14360): (iroquois homeobox 3) IRX3 is a member of the Iroquois homeobox gene family (see IRX1; MIM 606197) and plays a role in an early step of neural development (Bellefroid et al., 1998 [PubMed 9427753]). Members of this family appear to play multiple roles during pattern formation of vertebrate embryos (Lewis et al., 1999 [PubMed 10370142]).[supplied by OMIM, Aug 2009]

IRX3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IRX3	NM_024336.3	c.473G>C	p.Gly158Ala	missense_variant	2/4	ENST00000329734.4	NP_077312.2
IRX3	XM_005256139.4	c.473G>C	p.Gly158Ala	missense_variant	2/4		XP_005256196.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IRX3	ENST00000329734.4	c.473G>C	p.Gly158Ala	missense_variant	2/4	1	NM_024336.3	ENSP00000331608.3
IRX3	ENST00000558054.1	c.72+376G>C		intron_variant		2		ENSP00000463991.1
IRX3	ENST00000558180.2	n.252G>C		non_coding_transcript_exon_variant	2/2	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 10, 2024

The c.473G>C (p.G158A) alteration is located in exon 2 (coding exon 2) of the IRX3 gene. This alteration results from a G to C substitution at nucleotide position 473, causing the glycine (G) at amino acid position 158 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.80	D
Eigen	Benign	-0.27
Eigen_PC	Benign	-0.082
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.38	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	-1.2	N
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-5.9	D
REVEL	Uncertain	0.56
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.16	B
Vest4		0.66
MutPred		0.29		Gain of helix (P = 0.0325);
MVP		0.62
ClinPred		1.0	D
GERP RS		3.5
Varity_R		0.91
gMVP		0.68

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-54319320;