Genetic Variant SAFB:p.Gln124Glu (chr19-5641770-C-G) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001201338.2(SAFB):c.370C>G(p.Gln124Glu) variant causes a missense change. The variant allele was found at a frequency of 0.0000205 in 1,461,858 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: 31)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

SAFB
NM_001201338.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.90

Variant links:

Genes affected

SAFB (HGNC:10520): (scaffold attachment factor B) This gene encodes a DNA-binding protein which has high specificity for scaffold or matrix attachment region DNA elements (S/MAR DNA). This protein is thought to be involved in attaching the base of chromatin loops to the nuclear matrix but there is conflicting evidence as to whether this protein is a component of chromatin or a nuclear matrix protein. Scaffold attachment factors are a specific subset of nuclear matrix proteins (NMP) that specifically bind to S/MAR. The encoded protein is thought to serve as a molecular base to assemble a 'transcriptosome complex' in the vicinity of actively transcribed genes. It is involved in the regulation of heat shock protein 27 transcription, can act as an estrogen receptor co-repressor and is a candidate for breast tumorigenesis. This gene is arranged head-to-head with a similar gene whose product has the same functions. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jan 2011]

SAFB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2620521).

BS2

High AC in GnomAdExome4 at 30 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SAFB	NM_001201338.2 link	c.370C>G	p.Gln124Glu	missense_variant	Exon 4 of 21	ENST00000588852.2	NP_001188267.1	Q15424-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SAFB	ENST00000588852.2 link	c.370C>G	p.Gln124Glu	missense_variant	Exon 4 of 21	1	NM_001201338.2	ENSP00000467423.1		Q15424-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251486

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135918

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000205

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727224

show subpopulations

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:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 02, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.370C>G (p.Q124E) alteration is located in exon 4 (coding exon 4) of the SAFB gene. This alteration results from a C to G substitution at nucleotide position 370, causing the glutamine (Q) at amino acid position 124 to be replaced by a glutamic acid (E). 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

0.073

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.51

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Benign

0.17

T;.;.

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.26

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

L;L;L

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-1.6

N;.;.

REVEL

Benign

0.091

Sift

Benign

0.088

T;.;.

Sift4G

Benign

0.31

T;T;T

Polyphen

0.77

P;.;.

Vest4

0.38

MutPred

0.18

Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);

MVP

0.46

MPC

0.23

ClinPred

0.49

GERP RS

5.7

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.6

Varity_R

0.24

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over