Genetic Variant TRIOBP:p.Ala1863Asp (chr22-37755560-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001039141.3(TRIOBP):c.5588C>A(p.Ala1863Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,654 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1863V) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TRIOBP
NM_001039141.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.37

Publications

0 publications found

Variant links:

Genes affected

TRIOBP (HGNC:17009): (TRIO and F-actin binding protein) This gene encodes a protein with an N-terminal pleckstrin homology domain and a C-terminal coiled-coil region. The protein interacts with trio, which is involved with neural tissue development and controlling actin cytoskeleton organization, cell motility and cell growth. The protein also associates with F-actin and stabilizes F-actin structures. Mutations in this gene have been associated with a form of autosomal recessive nonsyndromic deafness. Multiple alternatively spliced transcript variants that would encode different isoforms have been found for this gene, however some transcripts may be subject to nonsense-mediated decay (NMD). [provided by RefSeq, Nov 2008]

TRIOBP Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 28
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), PanelApp Australia
hearing loss, autosomal recessive
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet

TRIOBP links:

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ACMG classification

Classification was made for transcript

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
TRIOBP	NM_001039141.3 link	c.5588C>A	p.Ala1863Asp	missense_variant	Exon 15 of 24	ENST00000644935.1	NP_001034230.1	Q9H2D6-1
TRIOBP	NM_007032.5 link	c.449C>A	p.Ala150Asp	missense_variant	Exon 5 of 14		NP_008963.3	Q9H2D6-7
TRIOBP	NM_138632.2 link	c.449C>A	p.Ala150Asp	missense_variant	Exon 5 of 8		NP_619538.2	Q9H2D6-6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRIOBP	ENST00000644935.1 link	c.5588C>A	p.Ala1863Asp	missense_variant	Exon 15 of 24		NM_001039141.3	ENSP00000496394.1		Q9H2D6-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461654

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727142

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53220

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111988

Other (OTH)

AF:

0.00

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Uncertain

-0.020

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.51

D;D;.;.;.;T;T;T

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.21

FATHMM_MKL

Benign

0.74

LIST_S2

Uncertain

0.87

.;D;.;D;D;D;T;D

M_CAP

Benign

0.045

MetaRNN

Uncertain

0.66

D;D;D;D;D;D;D;D

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;L;.;.;.;.;.;.

PhyloP100

1.4

PrimateAI

Uncertain

0.65

PROVEAN

Uncertain

-3.5

D;.;D;D;.;D;D;D

REVEL

Uncertain

0.51

Sift

Uncertain

0.0020

D;.;D;D;.;D;D;D

Sift4G

Uncertain

0.0040

D;.;D;D;.;D;D;D

Polyphen

0.99

D;D;.;.;.;.;.;.

Vest4

0.80

MutPred

0.65

Loss of MoRF binding (P = 0.0583);Loss of MoRF binding (P = 0.0583);.;.;.;.;.;.;

MVP

0.89

MPC

0.66

ClinPred

0.94

GERP RS

2.8

Varity_R

0.60

gMVP

0.75

Mutation Taster

=80/20

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.16

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over