21-33546275-G-A

Variant summary

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

The NM_138927.4(SON):c.140G>A(p.Gly47Asp) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,302 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: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SON NM_138927.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.14

Genes affected

SON (HGNC:11183): (SON DNA and RNA binding protein) This gene encodes a protein that contains multiple simple repeats. The encoded protein binds RNA and promotes pre-mRNA splicing, particularly of transcripts with poor splice sites. The protein also recognizes a specific DNA sequence found in the human hepatitis B virus (HBV) and represses HBV core promoter activity. There is a pseudogene for this gene on chromosome 1. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

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=0.19887424).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SON	NM_138927.4	c.140G>A	p.Gly47Asp	missense_variant	2/12	ENST00000356577.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SON	ENST00000356577.10	c.140G>A	p.Gly47Asp	missense_variant	2/12	1	NM_138927.4	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461302 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 726974

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 09, 2021

The c.140G>A (p.G47D) alteration is located in exon 2 (coding exon 2) of the SON gene. This alteration results from a G to A substitution at nucleotide position 140, causing the glycine (G) at amino acid position 47 to be replaced by an aspartic acid (D). 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	0.41
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.25	T;.;.;.
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.74	T;T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.20	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.90	L;.;L;L
MutationTaster	Benign	0.54	D;D;D;N;N
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-2.4	N;N;N;N
REVEL	Benign	0.19
Sift	Benign	0.056	T;D;T;T
Sift4G	Pathogenic	0.0	D;T;D;T
Polyphen		0.99	D;.;D;D
Vest4		0.74
MutPred		0.22		Gain of solvent accessibility (P = 0.1014);Gain of solvent accessibility (P = 0.1014);Gain of solvent accessibility (P = 0.1014);Gain of solvent accessibility (P = 0.1014);
MVP		0.57
MPC		0.50
ClinPred		0.89	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.32
gMVP		0.15

Splicing

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: chr21-34918581;