Genetic Variant HOXD13:p.Ala36dup (chr2-176092982-T-TGGC) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP3BS1_Supporting

The NM_000523.4(HOXD13):c.106_108dupGCG(p.Ala36dup) variant causes a conservative inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000469 in 1,349,830 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00050 ( 0 hom. )

Consequence

HOXD13
NM_000523.4 conservative_inframe_insertion

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.870

Variant links:

Genes affected

HOXD13 (HGNC:5136): (homeobox D13) This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms. Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, located on different chromosomes, consisting of 9 to 11 genes arranged in tandem. This gene is one of several homeobox HOXD genes located in a cluster on chromosome 2. Deletions that remove the entire HOXD gene cluster or the 5' end of this cluster have been associated with severe limb and genital abnormalities. Mutations in this particular gene cause synpolydactyly. [provided by RefSeq, Jul 2008]

HOXD13 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_000523.4

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000499 (598/1198826) while in subpopulation NFE AF= 0.00056 (552/986052). AF 95% confidence interval is 0.000521. There are 0 homozygotes in gnomad4_exome. There are 287 alleles in male gnomad4_exome subpopulation. Median coverage is 30. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HOXD13	NM_000523.4 link	c.106_108dupGCG	p.Ala36dup	conservative_inframe_insertion	Exon 1 of 2	ENST00000392539.4	NP_000514.2	P35453
HOXD13	XM_011511068.3 link	c.725-1484_725-1482dupGCG		intron_variant	Intron 1 of 1		XP_011509370.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HOXD13	ENST00000392539.4 link	c.106_108dupGCG	p.Ala36dup	conservative_inframe_insertion	Exon 1 of 2	1	NM_000523.4	ENSP00000376322.3		P35453

Frequencies

GnomAD3 genomes

AF:

0.000232

AC:

AN:

150896

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000729

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:

0.000473

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000138

AC:

AN:

43376

Hom.:

AF XY:

0.000187

AC XY:

AN XY:

26720

show subpopulations

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:

0.000338

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000499

AC:

598

AN:

1198826

Hom.:

Cov.:

AF XY:

0.000489

AC XY:

287

AN XY:

586546

show subpopulations

Gnomad4 AFR exome

AF:

0.0000842

Gnomad4 AMR exome

AF:

0.000272

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000388

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000560

Gnomad4 OTH exome

AF:

0.000808

GnomAD4 genome

AF:

0.000232

AC:

AN:

151004

Hom.:

Cov.:

AF XY:

0.000230

AC XY:

AN XY:

73768

show subpopulations

Gnomad4 AFR

AF:

0.0000727

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:

0.000473

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000242

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Nov 12, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant, c.106_108dup, results in the insertion of 1 amino acid(s) of the HOXD13 protein (p.Ala36dup), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (no rsID available, gnomAD 0.03%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with HOXD13-related conditions. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over