21-37191393-C-G

Variant names:

• chr21-37191393-C-G
• rs1203933476
• NM_001330683.2:c.5084C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001330683.2(TTC3):​c.5084C>G​(p.Ser1695Cys) 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. 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. S1695F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TTC3 NM_001330683.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.23
• Publications: 0 publications found

Genes affected

TTC3 (HGNC:12393): (tetratricopeptide repeat domain 3) Enables ubiquitin-protein transferase activity. Involved in protein K48-linked ubiquitination and ubiquitin-dependent protein catabolic process. Located in cytosol; nucleolus; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TTC3-AS1 (HGNC:40595): (TTC3 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24066451).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001330683.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC3	NM_001330683.2	MANE Select	c.5084C>G	p.Ser1695Cys	missense	Exon 40 of 46	NP_001317612.1	P53804-1
	TTC3	NM_001320703.2		c.5204C>G	p.Ser1735Cys	missense	Exon 41 of 47	NP_001307632.1
	TTC3	NM_001320704.2		c.5138C>G	p.Ser1713Cys	missense	Exon 41 of 47	NP_001307633.1	H7BZ57

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC3	ENST00000418766.6	TSL:5 MANE Select	c.5084C>G	p.Ser1695Cys	missense	Exon 40 of 46	ENSP00000403943.2	P53804-1
	TTC3	ENST00000354749.6	TSL:1	c.5084C>G	p.Ser1695Cys	missense	Exon 39 of 45	ENSP00000346791.2	P53804-1
	TTC3	ENST00000399017.6	TSL:1	c.5084C>G	p.Ser1695Cys	missense	Exon 40 of 46	ENSP00000381981.2	P53804-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.041	T
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.70	T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.24	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		1.2
PrimateAI	Benign	0.41	T
PROVEAN	Uncertain	-2.6	D
REVEL	Benign	0.14
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.24
MutPred		0.33		Loss of disorder (P = 0.0215)
MVP		0.46
MPC		0.13
ClinPred		0.98	D
GERP RS		4.4
PromoterAI		-0.00020	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.22
gMVP		0.15
Mutation Taster		=85/15	polymorphism

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

Other links and lift over

dbSNP: rs1203933476; hg19: chr21-38563694;