19-5587966-C-G

Position:

• chr19-5587966-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_014649.3(SAFB2):​c.2540G>C​(p.Trp847Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,459,826 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: SAFB2 NM_014649.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.50

Genes affected

SAFB2 (HGNC:21605): (scaffold attachment factor B2) The protein encoded by this gene, along with its paralog (scaffold attachment factor B1), is a repressor of estrogen receptor alpha. The encoded protein binds scaffold/matrix attachment region (S/MAR) DNA and is involved in cell cycle regulation, apoptosis, differentiation, the stress response, and regulation of immune genes. [provided by RefSeq, May 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SAFB2	NM_014649.3	c.2540G>C	p.Trp847Ser	missense_variant	19/21	ENST00000252542.9
SAFB2	XM_011528449.4	c.2540G>C	p.Trp847Ser	missense_variant	19/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SAFB2	ENST00000252542.9	c.2540G>C	p.Trp847Ser	missense_variant	19/21	1	NM_014649.3	P1
SAFB2	ENST00000587802.5	n.128G>C		non_coding_transcript_exon_variant	2/4	3
SAFB2	ENST00000589925.1	n.408G>C		non_coding_transcript_exon_variant	5/5	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1459826 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 726092

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 04, 2022

The c.2540G>C (p.W847S) alteration is located in exon 19 (coding exon 19) of the SAFB2 gene. This alteration results from a G to C substitution at nucleotide position 2540, causing the tryptophan (W) at amino acid position 847 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Uncertain	0.035	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.45	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.025	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.7	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-7.2	D
REVEL	Benign	0.25
Sift	Uncertain	0.027	D
Sift4G	Benign	0.48	T
Polyphen		1.0	D
Vest4		0.68
MutPred		0.36		Gain of phosphorylation at W847 (P = 0.0073);
MVP		0.32
MPC		0.23
ClinPred		0.99	D
GERP RS		4.4
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.9
Varity_R		0.58
gMVP		0.12

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: rs2052299386; hg19: chr19-5587977;