19-49107907-C-G

Position:

• chr19-49107907-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_003089.6(SNRNP70):​c.778C>G​(p.Arg260Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000716 in 1,396,100 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: 7.2e-7 (0 hom.)
• Consequence: SNRNP70 NM_003089.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.56

Genes affected

SNRNP70 (HGNC:11150): (small nuclear ribonucleoprotein U1 subunit 70) Enables U1 snRNA binding activity. Involved in mRNA splicing, via spliceosome and regulation of RNA splicing. Located in nucleoplasm. Part of U1 snRNP and spliceosomal complex. Implicated in disease of mental health and systemic lupus erythematosus. Biomarker of Alzheimer's disease. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3196867).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SNRNP70	NM_003089.6	c.778C>G	p.Arg260Gly	missense_variant	10/10	ENST00000598441.6	NP_003080.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SNRNP70	ENST00000598441.6	c.778C>G	p.Arg260Gly	missense_variant	10/10	1	NM_003089.6	ENSP00000472998	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.16e-7 AC: 1 AN: 1396100 Hom.: 0 Cov.: 33 AF XY: 0.00000145 AC XY: 1 AN XY: 688786

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: 9.27e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

Mar 13, 2023

The c.778C>G (p.R260G) alteration is located in exon 10 (coding exon 9) of the SNRNP70 gene. This alteration results from a C to G substitution at nucleotide position 778, causing the arginine (R) at amino acid position 260 to be replaced by a glycine (G). 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	Pathogenic	0.94
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.43	T;.
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.80	T;T
M_CAP	Uncertain	0.27	D
MetaRNN	Benign	0.32	T;T
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.4	M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.93	D
REVEL	Uncertain	0.30
Sift4G	Benign	0.075	T;T
Polyphen		0.98	D;D
Vest4		0.32
MutPred		0.27		Gain of relative solvent accessibility (P = 0.0166);.;
MVP		0.45
MPC		1.3
ClinPred		0.84	D
GERP RS		3.6
Varity_R		0.52
gMVP		0.98

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: chr19-49611164;