22-30339919-A-G

Variant names:

• chr22-30339919-A-G
• rs4339043
• NM_005877.6:c.1375+277T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_005877.6(SF3A1):​c.1375+277T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.875 in 152,240 control chromosomes in the GnomAD database, including 58,674 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.88 (58674 hom., cov: 31)
• Consequence: SF3A1 NM_005877.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.362
• Publications: 12 publications found

Genes affected

SF3A1 (HGNC:10765): (splicing factor 3a subunit 1) This gene encodes a subunit of the splicing factor 3a protein complex. The splicing factor 3a heterotrimer is a component of the mature U2 small nuclear ribonucleoprotein particle (snRNP). U2 small nuclear ribonucleoproteins play a critical role in spliceosome assembly and pre-mRNA splicing. [provided by RefSeq, Aug 2014]

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.959 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005877.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3A1	NM_005877.6	MANE Select	c.1375+277T>C		intron	N/A	NP_005868.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3A1	ENST00000215793.13	TSL:1 MANE Select	c.1375+277T>C		intron	N/A	ENSP00000215793.7
	SF3A1	ENST00000444440.1	TSL:5	c.450+290T>C		intron	N/A	ENSP00000400862.1
	SF3A1	ENST00000411423.1	TSL:4	n.64-740T>C		intron	N/A	ENSP00000412715.1

Frequencies

GnomAD3 genomes AF: 0.875 AC: 133127 AN: 152122 Hom.: 58615 Cov.: 31

Gnomad AFR AF: 0.967

Gnomad AMI AF: 0.721

Gnomad AMR AF: 0.872

Gnomad ASJ AF: 0.892

Gnomad EAS AF: 0.905

Gnomad SAS AF: 0.915

Gnomad FIN AF: 0.887

Gnomad MID AF: 0.962

Gnomad NFE AF: 0.814

Gnomad OTH AF: 0.878

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.875 AC: 133243 AN: 152240 Hom.: 58674 Cov.: 31 AF XY: 0.880 AC XY: 65495 AN XY: 74424

African (AFR) AF: 0.967 AC: 40199 AN: 41572

American (AMR) AF: 0.872 AC: 13330 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.892 AC: 3098 AN: 3472

East Asian (EAS) AF: 0.904 AC: 4679 AN: 5174

South Asian (SAS) AF: 0.915 AC: 4415 AN: 4826

European-Finnish (FIN) AF: 0.887 AC: 9401 AN: 10594

Middle Eastern (MID) AF: 0.966 AC: 284 AN: 294

European-Non Finnish (NFE) AF: 0.814 AC: 55320 AN: 67990

Other (OTH) AF: 0.879 AC: 1859 AN: 2114

Alfa AF: 0.834 Hom.: 87017

Bravo AF: 0.875

Asia WGS AF: 0.923 AC: 3210 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	5.2
DANN	Benign	0.69
PhyloP100		0.36
Mutation Taster		=100/0	polymorphism (auto)

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: rs4339043; hg19: chr22-30735908;