4-109848258-TTTG-T

Position:

• chr4-109848258-TTTG-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4_Supporting PP5

The NM_198506.5(LRIT3):​c.59_61del​(p.Leu20del) variant causes a inframe deletion change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: LRIT3 NM_198506.5 inframe_deletion
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.30

Genes affected

LRIT3 (HGNC:24783): (leucine rich repeat, Ig-like and transmembrane domains 3) This gene encodes a protein that has a fibronectin type III domain and a C-terminal transmembrane domain, as well as a leucine-rich repeat domain and immunoglobulin-like domain near the N-terminus. The encoded protein may regulate fibroblast growth factor receptors and affect the modification of these receptors, which are glycosylated differently in the Golgi and endoplasmic reticulum. Mutations in this gene are associated with congenital stationary night blindness, type 1F. [provided by RefSeq, May 2013]

RRH (HGNC:10450): (retinal pigment epithelium-derived rhodopsin homolog) Opsins are members of the guanine nucleotide-binding protein (G protein)-coupled receptor superfamily. This gene belongs to the seven-exon subfamily of mammalian opsin genes that includes opsin 5 and retinal G protein coupled receptor. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_198506.5. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 4-109848258-TTTG-T is Pathogenic according to our data. Variant chr4-109848258-TTTG-T is described in ClinVar as [Pathogenic]. Clinvar id is 1803094.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LRIT3	NM_198506.5	c.59_61del	p.Leu20del	inframe_deletion	1/4	ENST00000594814.6	NP_940908.3
LRIT3	XM_017008168.2	c.59_61del	p.Leu20del	inframe_deletion	1/3		XP_016863657.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LRIT3	ENST00000594814.6	c.59_61del	p.Leu20del	inframe_deletion	1/4	5	NM_198506.5	ENSP00000469759	P1
RRH	ENST00000652276.1	c.*4063_*4065del		3_prime_UTR_variant	4/4			ENSP00000498977

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Stargardt disease Pathogenic:1

Pathogenic, no assertion criteria provided

research

Ophthalmo-Genetics Lab, Instituto de Oftalmologia Conde de Valenciana

Dec 13, 2022

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Computational scores

Source: dbNSFP v4.3

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: chr4-110769414;