rs4326810

Variant names:

• chr11-124880241-A-G
• rs4326810
• NM_022370.4:c.3959-177A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_022370.4(ROBO3):​c.3959-177A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.154 in 152,184 control chromosomes in the GnomAD database, including 3,646 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.15 (3646 hom., cov: 33)
• Consequence: ROBO3 NM_022370.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.848
• Publications: 1 publications found

Genes affected

ROBO3 (HGNC:13433): (roundabout guidance receptor 3) This gene is a member of the Roundabout (ROBO) gene family that controls neurite outgrowth, growth cone guidance, and axon fasciculation. ROBO proteins are a subfamily of the immunoglobulin transmembrane receptor superfamily. SLIT proteins 1-3, a family of secreted chemorepellants, are ligands for ROBO proteins and SLIT/ROBO interactions regulate myogenesis, leukocyte migration, kidney morphogenesis, angiogenesis, and vasculogenesis in addition to neurogenesis. This gene, ROBO3, has a putative extracellular domain with five immunoglobulin (Ig)-like loops and three fibronectin (Fn) type III motifs, a transmembrane segment, and a cytoplasmic tail with three conserved signaling motifs: CC0, CC2, and CC3 (CC for conserved cytoplasmic). Unlike other ROBO family members, ROBO3 lacks motif CC1. The ROBO3 gene regulates axonal navigation at the ventral midline of the neural tube. In mouse, loss of Robo3 results in a complete failure of commissural axons to cross the midline throughout the spinal cord and the hindbrain. Mutations ROBO3 result in horizontal gaze palsy with progressive scoliosis (HGPPS); an autosomal recessive disorder characterized by congenital absence of horizontal gaze, progressive scoliosis, and failure of the corticospinal and somatosensory axon tracts to cross the midline in the medulla. [provided by RefSeq, May 2019]

ROBO3 Gene-Disease associations (from GenCC):

• gaze palsy, familial horizontal, with progressive scoliosis 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Genomics England PanelApp

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.397 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ROBO3	NM_022370.4	c.3959-177A>G		intron_variant	Intron 26 of 27	ENST00000397801.6	NP_071765.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ROBO3	ENST00000397801.6	c.3959-177A>G		intron_variant	Intron 26 of 27	1	NM_022370.4	ENSP00000380903.1

Frequencies

GnomAD3 genomes AF: 0.154 AC: 23450 AN: 152066 Hom.: 3630 Cov.: 33

Gnomad AFR AF: 0.402

Gnomad AMI AF: 0.0868

Gnomad AMR AF: 0.0831

Gnomad ASJ AF: 0.0795

Gnomad EAS AF: 0.0584

Gnomad SAS AF: 0.0633

Gnomad FIN AF: 0.0697

Gnomad MID AF: 0.152

Gnomad NFE AF: 0.0521

Gnomad OTH AF: 0.120

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.154 AC: 23506 AN: 152184 Hom.: 3646 Cov.: 33 AF XY: 0.152 AC XY: 11320 AN XY: 74416

African (AFR) AF: 0.402 AC: 16690 AN: 41474

American (AMR) AF: 0.0829 AC: 1268 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.0795 AC: 276 AN: 3470

East Asian (EAS) AF: 0.0586 AC: 303 AN: 5174

South Asian (SAS) AF: 0.0631 AC: 305 AN: 4830

European-Finnish (FIN) AF: 0.0697 AC: 740 AN: 10618

Middle Eastern (MID) AF: 0.160 AC: 47 AN: 294

European-Non Finnish (NFE) AF: 0.0521 AC: 3544 AN: 68008

Other (OTH) AF: 0.120 AC: 254 AN: 2112

Alfa AF: 0.0949 Hom.: 681

Bravo AF: 0.166

Asia WGS AF: 0.0790 AC: 275 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	1.4
DANN	Benign	0.51
PhyloP100		-0.85
Mutation Taster		=100/0	polymorphism (auto)

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: rs4326810; hg19: chr11-124750137;