chr22-32859277-C-G

Variant names:

• chr22-32859277-C-G
• rs137853300
• NM_000362.5:c.536C>G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PP3_Strong PP5_Moderate

The NM_000362.5(TIMP3):​c.536C>G​(p.Ser179Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TIMP3 NM_000362.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.90

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]

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a region_of_interest Mediates interaction with EFEMP1 (size 83) in uniprot entity TIMP3_HUMAN there are 10 pathogenic changes around while only 0 benign (100%) in NM_000362.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.955
• PP5: Variant 22-32859277-C-G is Pathogenic according to our data. Variant chr22-32859277-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 12678.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr22-32859277-C-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TIMP3	NM_000362.5	c.536C>G	p.Ser179Cys	missense_variant	Exon 5 of 5	ENST00000266085.7	NP_000353.1
SYN3	NM_003490.4	c.711+5638G>C		intron_variant	Intron 6 of 13	ENST00000358763.7	NP_003481.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIMP3	ENST00000266085.7	c.536C>G	p.Ser179Cys	missense_variant	Exon 5 of 5	1	NM_000362.5	ENSP00000266085.5
SYN3	ENST00000358763.7	c.711+5638G>C		intron_variant	Intron 6 of 13	5	NM_003490.4	ENSP00000351614.2
SYN3	ENST00000462268.1	n.225+5638G>C		intron_variant	Intron 2 of 2	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Sorsby fundus dystrophy Pathogenic:1

Dec 01, 1995

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Retinal dystrophy Pathogenic:1

Jan 01, 2022

Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.71
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.86	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.41	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	0.95	D
MutationAssessor	Uncertain	2.6	M
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.8	N
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0060	D
Polyphen		0.86	P
Vest4		0.46
MutPred		0.94		Gain of methylation at K180 (P = 0.0158);
MVP		1.0
MPC		1.9
ClinPred		0.94	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.73
gMVP		0.91

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

Other links and lift over

dbSNP: rs137853300; hg19: chr22-33255264;