rs1057519959

Positions:

• chr11-66063028-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_006842.3(SF3B2):​c.1997A>C​(p.His666Pro) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SF3B2 NM_006842.3 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:4
• Conservation: PhyloP100: 8.32

Genes affected

SF3B2 (HGNC:10769): (splicing factor 3b subunit 2) This gene encodes subunit 2 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 2 associates with pre-mRNA upstream of the branch site at the anchoring site. Subunit 2 also interacts directly with subunit 4 of the splicing factor 3b complex. Subunit 2 is a highly hydrophilic protein with a proline-rich N-terminus and a glutamate-rich stretch in the C-terminus. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.826

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SF3B2	NM_006842.3	c.1997A>C	p.His666Pro	missense_variant	17/22	ENST00000322535.11	NP_006833.2
SF3B2	XM_005273726.5	c.1994A>C	p.His665Pro	missense_variant	17/22		XP_005273783.1
SF3B2	XM_011544740.4	c.1994A>C	p.His665Pro	missense_variant	17/22		XP_011543042.1
SF3B2	XM_017017144.3	c.1991A>C	p.His664Pro	missense_variant	17/22		XP_016872633.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SF3B2	ENST00000322535.11	c.1997A>C	p.His666Pro	missense_variant	17/22	1	NM_006842.3	ENSP00000318861.6
SF3B2	ENST00000528302.5	c.1946A>C	p.His649Pro	missense_variant	16/21	5		ENSP00000432655.1
SF3B2	ENST00000530981.1	c.257A>C	p.His86Pro	missense_variant	4/9	5		ENSP00000436757.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:4

Revision: no assertion criteria provided

Submissions by phenotype

B-cell chronic lymphocytic leukemia Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Breast neoplasm Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Malignant melanoma of skin Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Hepatocellular carcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.46
CADD	Pathogenic	30
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.43	T;D
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.98	D;D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.83	D;D
MetaSVM	Uncertain	0.37	D
MutationAssessor	Pathogenic	3.5	.;H
PrimateAI	Pathogenic	0.80	T
PROVEAN	Pathogenic	-9.3	D;D
REVEL	Pathogenic	0.89
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0020	D;D
Polyphen		0.92	.;P
Vest4		0.90
MutPred		0.47		.;Gain of disorder (P = 0.0202);
MVP		0.73
MPC		2.5
ClinPred		1.0	D
GERP RS		5.3
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.1
Varity_R		0.85
gMVP		0.97

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: rs1057519959; hg19: chr11-65830499;