16-70564015-G-A

Variant names:

• chr16-70564015-G-A
• rs765317316
• NM_012426.5:c.2428G>A

Variant summary

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

The NM_012426.5(SF3B3):​c.2428G>A​(p.Ala810Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,864 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A810S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SF3B3 NM_012426.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.99
• Publications: 0 publications found

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

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=0.25047928).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012426.5. 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
	SF3B3	NM_012426.5	MANE Select	c.2428G>A	p.Ala810Thr	missense	Exon 18 of 26	NP_036558.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3B3	ENST00000302516.10	TSL:1 MANE Select	c.2428G>A	p.Ala810Thr	missense	Exon 18 of 26	ENSP00000305790.5	Q15393-1
	SF3B3	ENST00000918237.1		c.2509G>A	p.Ala837Thr	missense	Exon 19 of 27	ENSP00000588296.1
	SF3B3	ENST00000909659.1		c.2488G>A	p.Ala830Thr	missense	Exon 19 of 27	ENSP00000579718.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251302 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 1461864 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727238

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53406

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112006

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.026	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.097	T
Eigen	Benign	0.13
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.0084	T
MetaRNN	Benign	0.25	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.5	L
PhyloP100		8.0
PrimateAI	Pathogenic	0.89	D
PROVEAN	Benign	-0.63	N
REVEL	Benign	0.16
Sift	Benign	0.47	T
Sift4G	Benign	0.54	T
Polyphen		0.013	B
Vest4		0.41
MutPred		0.23		Gain of glycosylation at A810 (P = 0.0351)
MVP		0.69
MPC		1.0
ClinPred		0.45	T
GERP RS		5.3
Varity_R		0.31
gMVP		0.39

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: rs765317316; hg19: chr16-70597918;