19-5641851-G-C

Position:

• chr19-5641851-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001201338.2(SAFB):​c.451G>C​(p.Asp151His) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: SAFB NM_001201338.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.13

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13892376).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SAFB	NM_001201338.2	c.451G>C	p.Asp151His	missense_variant	4/21	ENST00000588852.2	NP_001188267.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SAFB	ENST00000588852.2	c.451G>C	p.Asp151His	missense_variant	4/21	1	NM_001201338.2	ENSP00000467423.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

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

Dec 16, 2023

The c.451G>C (p.D151H) alteration is located in exon 4 (coding exon 4) of the SAFB gene. This alteration results from a G to C substitution at nucleotide position 451, causing the aspartic acid (D) at amino acid position 151 to be replaced by a histidine (H). 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	0.12
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T;.;.
Eigen	Benign	0.12
Eigen_PC	Benign	0.21
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.63	T;T;T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.14	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.0	L;L;L
PrimateAI	Benign	0.45	T
PROVEAN	Benign	0.060	N;.;.
REVEL	Benign	0.10
Sift	Benign	0.064	T;.;.
Sift4G	Benign	0.18	T;T;T
Polyphen		0.47	P;.;.
Vest4		0.19
MutPred		0.25		Gain of catalytic residue at D150 (P = 0.0728);Gain of catalytic residue at D150 (P = 0.0728);Gain of catalytic residue at D150 (P = 0.0728);
MVP		0.34
MPC		0.43
ClinPred		0.48	T
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.046
gMVP		0.056

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-5641862;