chr22-32802023-A-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_000362.5(TIMP3):c.22A>G(p.Ile8Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. I8I) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TIMP3
NM_000362.5 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.632

Publications

0 publications found

Variant links:

Genes affected

TIMP3 (HGNC:11822): (TIMP metallopeptidase inhibitor 3) This gene belongs to the TIMP gene family. The proteins encoded by this gene family are inhibitors of the matrix metalloproteinases, a group of peptidases involved in degradation of the extracellular matrix (ECM). Expression of this gene is induced in response to mitogenic stimulation and this netrin domain-containing protein is localized to the ECM. Mutations in this gene have been associated with the autosomal dominant disorder Sorsby's fundus dystrophy. [provided by RefSeq, Jul 2008]

TIMP3 links:

SYN3 (HGNC:11496): (synapsin III) This gene is a member of the synapsin gene family. Synapsins encode neuronal phosphoproteins which associate with the cytoplasmic surface of synaptic vesicles. Family members are characterized by common protein domains, and they are implicated in synaptogenesis and the modulation of neurotransmitter release, suggesting a potential role in several neuropsychiatric diseases. The protein encoded by this gene shares the synapsin family domain model, with domains A, C, and E exhibiting the highest degree of conservation. The protein contains a unique domain J, located between domains C and E. Based on this gene's localization to 22q12.3, a possible schizophrenia susceptibility locus, and the established neurobiological roles of the synapsins, this family member may represent a candidate gene for schizophrenia. The TIMP3 gene is located within an intron of this gene and is transcribed in the opposite direction. Alternative splicing of this gene results in multiple splice variants that encode different isoforms. [provided by RefSeq, Oct 2008]

SYN3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.045610696).

BP6

Variant 22-32802023-A-G is Benign according to our data. Variant chr22-32802023-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 3968955.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TIMP3	NM_000362.5 link	c.22A>G	p.Ile8Val	missense_variant	Exon 1 of 5	ENST00000266085.7	NP_000353.1	P35625
SYN3	NM_003490.4 link	c.711+62892T>C		intron_variant	Intron 6 of 13	ENST00000358763.7	NP_003481.3	O14994A0A024R1I8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TIMP3	ENST00000266085.7 link	c.22A>G	p.Ile8Val	missense_variant	Exon 1 of 5	1	NM_000362.5	ENSP00000266085.5	P35625
SYN3	ENST00000358763.7 link	c.711+62892T>C		intron_variant	Intron 6 of 13	5	NM_003490.4	ENSP00000351614.2	O14994
SYN3	ENST00000462268.1 link	n.225+62892T>C		intron_variant	Intron 2 of 2	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1425156

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

706492

African (AFR)

AF:

0.00

AC:

AN:

33010

American (AMR)

AF:

0.00

AC:

AN:

40244

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25500

East Asian (EAS)

AF:

0.00

AC:

AN:

38178

South Asian (SAS)

AF:

0.00

AC:

AN:

81854

European-Finnish (FIN)

AF:

0.00

AC:

AN:

42478

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5688

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1098962

Other (OTH)

AF:

0.00

AC:

AN:

59242

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Apr 19, 2025

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.22

Eigen

Benign

-1.1

Eigen_PC

Benign

-0.85

FATHMM_MKL

Benign

0.014

LIST_S2

Benign

0.44

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.046

MetaSVM

Benign

-0.63

MutationAssessor

Benign

-1.8

PhyloP100

0.63

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.29

REVEL

Benign

0.26

Sift

Benign

1.0

Sift4G

Benign

0.42

Polyphen

0.0

Vest4

0.023

MutPred

0.34

Gain of sheet (P = 1e-04);

MVP

0.39

MPC

0.88

ClinPred

0.089

GERP RS

4.0

PromoterAI

0.0047

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.032

gMVP

0.59

Mutation Taster

=83/17

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over