rs193921118

Positions:

• chr16-70554544-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_012426.5(SF3B3):​c.1501G>T​(p.Gly501Trp) 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 Uncertain significance (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SF3B3 NM_012426.5 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 9.71

Genes affected

SF3B3 (HGNC:10770): (splicing factor 3b subunit 3) This gene encodes subunit 3 of the splicing factor 3b protein complex. Splicing factor 3b, together with splicing factor 3a and a 12S RNA unit, forms the U2 small nuclear ribonucleoproteins complex (U2 snRNP). The splicing factor 3b/3a complex binds pre-mRNA upstream of the intron's branch site in a sequence independent manner and may anchor the U2 snRNP to the pre-mRNA. Splicing factor 3b is also a component of the minor U12-type spliceosome. Subunit 3 has also been identified as a component of the STAGA (SPT3-TAF(II)31-GCN5L acetylase) transcription coactivator-HAT (histone acetyltransferase) complex, and the TFTC (TATA-binding-protein-free TAF(II)-containing complex). These complexes may function in chromatin modification, transcription, splicing, and DNA repair. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.843

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SF3B3	NM_012426.5	c.1501G>T	p.Gly501Trp	missense_variant	12/26	ENST00000302516.10	NP_036558.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SF3B3	ENST00000302516.10	c.1501G>T	p.Gly501Trp	missense_variant	12/26	1	NM_012426.5	ENSP00000305790	P1
SF3B3	ENST00000567250.5	n.575G>T		non_coding_transcript_exon_variant	2/5	3
SF3B3	ENST00000568291.2	n.439G>T		non_coding_transcript_exon_variant	1/3	2
SF3B3	ENST00000567635.5	c.*117G>T		3_prime_UTR_variant, NMD_transcript_variant	5/7	5		ENSP00000463253

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

Malignant tumor of prostate Uncertain:1

Uncertain significance, no assertion criteria provided

literature only

Science for Life laboratory, Karolinska Institutet

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	T
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.085	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Benign	-0.29	T
MutationAssessor	Uncertain	2.8	M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.94	D
PROVEAN	Pathogenic	-4.8	D
REVEL	Uncertain	0.54
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0070	D
Polyphen		1.0	D
Vest4		0.78
MutPred		0.46		Loss of disorder (P = 0.0227);
MVP		0.71
MPC		2.4
ClinPred		1.0	D
GERP RS		5.1
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.8
Varity_R		0.69
gMVP		0.86

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

LitVar

Other links and lift over

dbSNP: rs193921118; hg19: chr16-70588447; COSMIC: COSV56786292;