12-108524481-T-C

Variant names:

• chr12-108524481-T-C
• rs1187955170
• NM_014706.4:c.2549A>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014706.4(SART3):​c.2549A>G​(p.Asn850Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,874 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SART3 NM_014706.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.17

Genes affected

SART3 (HGNC:16860): (spliceosome associated factor 3, U4/U6 recycling protein) The protein encoded by this gene is an RNA-binding nuclear protein that is a tumor-rejection antigen. This antigen possesses tumor epitopes capable of inducing HLA-A24-restricted and tumor-specific cytotoxic T lymphocytes in cancer patients and may be useful for specific immunotherapy. This gene product is found to be an important cellular factor for HIV-1 gene expression and viral replication. It also associates transiently with U6 and U4/U6 snRNPs during the recycling phase of the spliceosome cycle. This encoded protein is thought to be involved in the regulation of mRNA splicing. [provided by RefSeq, Jul 2008]

FICD (HGNC:18416): (FIC domain protein adenylyltransferase) Enables several functions, including ATP binding activity; Hsp70 protein binding activity; and chaperone binding activity. Involved in protein adenylylation; regulation of IRE1-mediated unfolded protein response; and response to endoplasmic reticulum stress. Is integral component of endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.092132986).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SART3	NM_014706.4	c.2549A>G	p.Asn850Ser	missense_variant	Exon 18 of 19	ENST00000546815.6	NP_055521.1
SART3	NM_001410983.1	c.2603A>G	p.Asn868Ser	missense_variant	Exon 18 of 19		NP_001397912.1
SART3	XM_047429916.1	c.1685A>G	p.Asn562Ser	missense_variant	Exon 13 of 14		XP_047285872.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SART3	ENST00000546815.6	c.2549A>G	p.Asn850Ser	missense_variant	Exon 18 of 19	5	NM_014706.4	ENSP00000449386.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251484 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135918

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461874 Hom.: 0 Cov.: 36 AF XY: 0.00000138 AC XY: 1 AN XY: 727244

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 28, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2549A>G (p.N850S) alteration is located in exon 18 (coding exon 18) of the SART3 gene. This alteration results from a A to G substitution at nucleotide position 2549, causing the asparagine (N) at amino acid position 850 to be replaced by a serine (S). 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	0.081
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	14
DANN	Uncertain	0.99
DEOGEN2	Benign	0.055	T;.;.
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.57
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.88	D;D;D
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.092	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.1	L;.;.
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-2.2	N;N;N
REVEL	Benign	0.045
Sift	Benign	0.046	D;D;T
Sift4G	Benign	0.11	T;T;T
Polyphen		0.078	B;.;.
Vest4		0.13
MutPred		0.48		Gain of catalytic residue at E847 (P = 0.0063);.;.;
MVP		0.43
MPC		0.18
ClinPred		0.14	T
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.062

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: rs1187955170; hg19: chr12-108918258;