NM_006802.4:c.1181A>C

Variant names:

• chr1-37969454-T-G
• NM_006802.4:c.1181A>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006802.4(SF3A3):​c.1181A>C​(p.Tyr394Ser) 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. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SF3A3 NM_006802.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.67
• Publications: 0 publications found

Genes affected

SF3A3 (HGNC:10767): (splicing factor 3a subunit 3) This gene encodes subunit 3 of the splicing factor 3a protein complex. The splicing factor 3a heterotrimer includes subunits 1, 2 and 3 and is necessary for the in vitro conversion of 15S U2 snRNP into an active 17S particle that performs pre-mRNA splicing. Subunit 3 interacts with subunit 1 through its amino-terminus while the zinc finger domain of subunit 3 plays a role in its binding to the 15S U2 snRNP. This gene has a pseudogene on chromosome 20. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2016]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.917

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006802.4. 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
	SF3A3	NM_006802.4	MANE Select	c.1181A>C	p.Tyr394Ser	missense	Exon 14 of 17	NP_006793.1	Q12874
	SF3A3	NM_001320830.2		c.1022A>C	p.Tyr341Ser	missense	Exon 12 of 15	NP_001307759.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3A3	ENST00000373019.5	TSL:1 MANE Select	c.1181A>C	p.Tyr394Ser	missense	Exon 14 of 17	ENSP00000362110.4	Q12874
	SF3A3	ENST00000896916.1		c.1181A>C	p.Tyr394Ser	missense	Exon 14 of 18	ENSP00000566975.1
	SF3A3	ENST00000963486.1		c.1235A>C	p.Tyr412Ser	missense	Exon 15 of 18	ENSP00000633545.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.48
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.53	D
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Uncertain	0.44	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		7.7
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-8.0	D
REVEL	Pathogenic	0.74
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.84
MutPred		0.67		Gain of disorder (P = 0.1035)
MVP		0.66
MPC		2.6
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6
Varity_R		0.98
gMVP		0.97
Mutation Taster		=4/96	disease causing

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

hg19: chr1-38435126;