5-14143784-C-T

Position:

chr5-14143784-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_007118.4(TRIO):c.59C>T(p.Ala20Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000488 in 1,025,564 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000068 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000046 ( 0 hom. )

Consequence

TRIO
NM_007118.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.72

Variant links:

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]

TRIO links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TRIO. . Gene score misZ 5.3161 (greater than the threshold 3.09). Trascript score misZ 4.6722 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, autosomal dominant 40, syndromic intellectual disability, intellectual developmental disorder, autosomal dominant 63, with macrocephaly, micrognathia-recurrent infections-behavioral abnormalities-mild intellectual disability syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.12553027).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRIO	NM_007118.4 linkuse as main transcript	c.59C>T	p.Ala20Val	missense_variant	1/57	ENST00000344204.9	NP_009049.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TRIO	ENST00000344204.9 linkuse as main transcript	c.59C>T	p.Ala20Val	missense_variant	1/57	1	NM_007118.4	ENSP00000339299	P1	O75962-1
TRIO	ENST00000698541.1 linkuse as main transcript	c.59C>T	p.Ala20Val	missense_variant	1/37			ENSP00000513786
TRIO	ENST00000502816.1 linkuse as main transcript	n.83C>T		non_coding_transcript_exon_variant	1/5	2
TRIO	ENST00000505971.5 linkuse as main transcript	n.83C>T		non_coding_transcript_exon_variant	1/4	3

Frequencies

GnomAD3 genomes

AF:

0.00000682

AC:

AN:

146724

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000245

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000455

AC:

AN:

878840

Hom.:

Cov.:

AF XY:

0.00000244

AC XY:

AN XY:

409656

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.00000682

AC:

AN:

146724

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

71408

show subpopulations

Gnomad4 AFR

AF:

0.0000245

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:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 11, 2022

The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the gnomAD database. This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 20 of the TRIO protein (p.Ala20Val). This variant has not been reported in the literature in individuals affected with TRIO-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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TRIO protein function. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.46

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.048

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.024

LIST_S2

Benign

0.39

M_CAP

Pathogenic

0.66

MetaRNN

Benign

0.13

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

MutationTaster

Benign

1.0

N;N

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

0.040

REVEL

Benign

0.081

Sift

Benign

0.52

Sift4G

Benign

1.0

Polyphen

0.46

Vest4

0.13

MutPred

0.28

Gain of catalytic residue at A20 (P = 0.0676);

MVP

0.56

MPC

0.83

ClinPred

0.092

GERP RS

-0.29

Varity_R

0.046

gMVP

0.20

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

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