5-14143738-A-AGCG

Variant names:

• chr5-14143738-A-AGCG
• NM_007118.4:c.18_20dupCGG

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PM4_Supporting

The NM_007118.4(TRIO):​c.18_20dupCGG​(p.Gly7dup) variant causes a disruptive inframe insertion 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: TRIO NM_007118.4 disruptive_inframe_insertion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.18

Genes affected

TRIO (HGNC:12303): (trio Rho guanine nucleotide exchange factor) This gene encodes a large protein that functions as a GDP to GTP exchange factor. This protein promotes the reorganization of the actin cytoskeleton, thereby playing a role in cell migration and growth. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_007118.4. Strenght limited to Supporting due to length of the change: 1aa.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRIO	NM_007118.4	c.18_20dupCGG	p.Gly7dup	disruptive_inframe_insertion	Exon 1 of 57	ENST00000344204.9	NP_009049.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRIO	ENST00000344204.9	c.18_20dupCGG	p.Gly7dup	disruptive_inframe_insertion	Exon 1 of 57	1	NM_007118.4	ENSP00000339299.4
TRIO	ENST00000698541.1	c.18_20dupCGG	p.Gly7dup	disruptive_inframe_insertion	Exon 1 of 37			ENSP00000513786.1
TRIO	ENST00000502816.1	n.42_44dupCGG		non_coding_transcript_exon_variant	Exon 1 of 5	2
TRIO	ENST00000505971.5	n.42_44dupCGG		non_coding_transcript_exon_variant	Exon 1 of 4	3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Nov 12, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.18_20dupCGG (p.G7dup) alteration is located in exon 1 (coding exon 1) of the TRIO gene. The alteration consists of an in-frame duplication of 3 nucleotides from position 18 to 20, resulting in the duplication of 1 residue. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Splicing

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: chr5-14143847;