chr19-5590336-C-G

Position:

• chr19-5590336-C-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_014649.3(SAFB2):​c.2467G>C​(p.Gly823Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,458,142 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: SAFB2 NM_014649.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.20

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 Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.25673425).
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SAFB2	NM_014649.3	c.2467G>C	p.Gly823Arg	missense_variant	18/21	ENST00000252542.9
SAFB2	XM_011528449.4	c.2467G>C	p.Gly823Arg	missense_variant	18/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SAFB2	ENST00000252542.9	c.2467G>C	p.Gly823Arg	missense_variant	18/21	1	NM_014649.3	P1
SAFB2	ENST00000589925.1	n.335G>C		non_coding_transcript_exon_variant	4/5	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1458142 Hom.: 0 Cov.: 32 AF XY: 0.00000552 AC XY: 4 AN XY: 725094

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000253

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000577 AC: 2 AN: 3478

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

Jan 26, 2023

The c.2467G>C (p.G823R) alteration is located in exon 18 (coding exon 18) of the SAFB2 gene. This alteration results from a G to C substitution at nucleotide position 2467, causing the glycine (G) at amino acid position 823 to be replaced by an arginine (R). 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	Uncertain	0.48
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.0061	T
MetaRNN	Benign	0.26	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	L
MutationTaster	Benign	0.97	D
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-2.2	N
REVEL	Benign	0.085
Sift	Benign	0.056	T
Sift4G	Benign	0.34	T
Polyphen		0.99	D
Vest4		0.35
MutPred		0.25		Gain of MoRF binding (P = 0.0123);
MVP		0.10
MPC		0.086
ClinPred		0.55	D
GERP RS		3.5
Varity_R		0.060
gMVP		0.048

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: rs1599223985; hg19: chr19-5590347;