3-8620004-A-G

Variant summary

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

The NM_001256748.3(SSUH2):c.992T>C(p.Ile331Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,712 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: SSUH2 NM_001256748.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.90

Genes affected

SSUH2 (HGNC:24809): (ssu-2 homolog) Involved in odontogenesis. Located in cytoplasm and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

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/exons	MANE	UniProt
SSUH2	NM_001256748.3	c.992T>C	p.Ile331Thr	missense_variant	12/12	ENST00000544814.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SSUH2	ENST00000544814.7	c.992T>C	p.Ile331Thr	missense_variant	12/12	2	NM_001256748.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461712 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727164

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000709 Hom.: 0

Bravo AF: 0.0000113

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 18, 2022

The c.926T>C (p.I309T) alteration is located in exon 12 (coding exon 9) of the SSUH2 gene. This alteration results from a T to C substitution at nucleotide position 926, causing the isoleucine (I) at amino acid position 309 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	Pathogenic	0.62
BayesDel_addAF	Uncertain	0.056	T
BayesDel_noAF	Benign	-0.16
Cadd	Benign	23
Dann	Uncertain	1.0
Eigen	Benign	0.17
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.76	T;.;T
M_CAP	Benign	0.063	D
MetaRNN	Uncertain	0.66	D;D;D
MetaSVM	Benign	-0.78	T
MutationTaster	Benign	0.96	D;D;D;D
PrimateAI	Uncertain	0.51	T
PROVEAN	Uncertain	-4.0	D;D;D
REVEL	Uncertain	0.41
Sift	Uncertain	0.0030	D;D;D
Sift4G	Uncertain	0.0050	D;D;D
Polyphen		0.59	.;P;P
Vest4		0.58
MutPred		0.67		.;Loss of sheet (P = 0.0043);Loss of sheet (P = 0.0043);
MVP		0.33
MPC		0.25
ClinPred		0.99	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.58
gMVP		0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1696085661; hg19: chr3-8661690; COSMIC: COSV99066810;