3-12158738-C-T

Variant names:

• chr3-12158738-C-T
• NM_003256.4:c.103G>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_003256.4(TIMP4):​c.103G>A​(p.Ala35Thr) variant causes a missense 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: 32)
• Consequence: TIMP4 NM_003256.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.660

Genes affected

TIMP4 (HGNC:11823): (TIMP metallopeptidase inhibitor 4) 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. The secreted, netrin domain-containing protein encoded by this gene is involved in regulation of platelet aggregation and recruitment and may play role in hormonal regulation and endometrial tissue remodeling. [provided by RefSeq, Jul 2008]

SYN2 (HGNC:11495): (synapsin II) 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. This member of the synapsin family encodes a neuron-specific phosphoprotein that selectively binds to small synaptic vesicles in the presynaptic nerve terminal. Polymorphisms in this gene are associated with abnormal presynaptic function and related neuronal disorders, including autism, epilepsy, bipolar disorder and schizophrenia. Alternative splicing of this gene results in multiple transcript variants. The tissue inhibitor of metalloproteinase 4 gene is located within an intron of this gene and is transcribed in the opposite direction. [provided by RefSeq, Feb 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 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
TIMP4	NM_003256.4	c.103G>A	p.Ala35Thr	missense_variant	Exon 1 of 5	ENST00000287814.5	NP_003247.1
SYN2	NM_133625.6	c.775-2808C>T		intron_variant	Intron 5 of 12	ENST00000621198.5	NP_598328.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIMP4	ENST00000287814.5	c.103G>A	p.Ala35Thr	missense_variant	Exon 1 of 5	1	NM_003256.4	ENSP00000287814.4
SYN2	ENST00000621198.5	c.775-2808C>T		intron_variant	Intron 5 of 12	1	NM_133625.6	ENSP00000480050.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 22, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.103G>A (p.A35T) alteration is located in exon 1 (coding exon 1) of the TIMP4 gene. This alteration results from a G to A substitution at nucleotide position 103, causing the alanine (A) at amino acid position 35 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.095	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	T
Eigen	Benign	-0.14
Eigen_PC	Benign	-0.086
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.77	T
M_CAP	Uncertain	0.28	D
MetaRNN	Uncertain	0.44	T
MetaSVM	Uncertain	0.033	D
MutationAssessor	Benign	1.1	L
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.83	N
REVEL	Uncertain	0.42
Sift	Benign	0.44	T
Sift4G	Benign	0.62	T
Polyphen		0.71	P
Vest4		0.17
MutPred		0.31		Gain of glycosylation at A35 (P = 0.0499);
MVP		0.85
MPC		0.064
ClinPred		0.78	D
GERP RS		3.7
Varity_R		0.083
gMVP		0.32

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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: chr3-12200238;