11-126424687-C-A

Variant names:

• chr11-126424687-C-A
• NM_032531.4:c.2230G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_032531.4(KIRREL3):​c.2230G>T​(p.Asp744Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: KIRREL3 NM_032531.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.35
• Publications: 0 publications found

Genes affected

KIRREL3 (HGNC:23204): (kirre like nephrin family adhesion molecule 3) The protein encoded by this gene is a member of the nephrin-like protein family. These proteins are expressed in fetal and adult brain, and also in podocytes of kidney glomeruli. The cytoplasmic domains of these proteins interact with the C-terminus of podocin, also expressed in the podocytes, cells involved in ensuring size- and charge-selective ultrafiltration. The protein encoded by this gene is a synaptic cell adhesion molecule with multiple extracellular immunoglobulin-like domains and a cytoplasmic PDZ domain-binding motif. Mutations in this gene are associated with several neurological and cognitive disorders. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

ST3GAL4 (HGNC:10864): (ST3 beta-galactoside alpha-2,3-sialyltransferase 4) This gene encodes a member of the glycosyltransferase 29 family, a group of enzymes involved in protein glycosylation. The encoded protein is targeted to Golgi membranes but may be proteolytically processed and secreted. The gene product may also be involved in the increased expression of sialyl Lewis X antigen seen in inflammatory responses. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIRREL3	NM_032531.4	c.2230G>T	p.Asp744Tyr	missense_variant	Exon 17 of 17	ENST00000525144.7	NP_115920.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIRREL3	ENST00000525144.7	c.2230G>T	p.Asp744Tyr	missense_variant	Exon 17 of 17	1	NM_032531.4	ENSP00000435466.2
KIRREL3	ENST00000529097.6	c.2194G>T	p.Asp732Tyr	missense_variant	Exon 16 of 16	1		ENSP00000434081.2
ST3GAL4	ENST00000524834.5	n.629+15276C>A		intron_variant	Intron 6 of 6	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jun 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2230G>T (p.D744Y) alteration is located in exon 17 (coding exon 17) of the KIRREL3 gene. This alteration results from a G to T substitution at nucleotide position 2230, causing the aspartic acid (D) at amino acid position 744 to be replaced by a tyrosine (Y). 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	0.72
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.22	T;T
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.92	D;D
M_CAP	Benign	0.063	D
MetaRNN	Uncertain	0.64	D;D
MetaSVM	Benign	-0.58	T
MutationAssessor	Benign	0.69	N;.
PhyloP100		7.3
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-3.0	D;D
REVEL	Uncertain	0.42
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		1.0	D;D
Vest4		0.66
MutPred		0.38		Gain of sheet (P = 0.0149);.;
MVP		0.42
MPC		1.4
ClinPred		0.99	D
GERP RS		4.6
Varity_R		0.64
gMVP		0.70
Mutation Taster		=26/74	disease causing

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

hg19: chr11-126294582;