chr20-2461781-G-A

Position:

chr20-2461781-G-A

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM2BP4_StrongBP6BS1

The ENST00000438552.6(SNRPB):c.698C>T(p.Pro233Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000918 in 1,611,468 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P233R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000097 ( 0 hom. )

Consequence

SNRPB
ENST00000438552.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 3.89

Variant links:

Genes affected

SNRPB (HGNC:11153): (small nuclear ribonucleoprotein polypeptides B and B1) The protein encoded by this gene is one of several nuclear proteins that are found in common among U1, U2, U4/U6, and U5 small ribonucleoprotein particles (snRNPs). These snRNPs are involved in pre-mRNA splicing, and the encoded protein may also play a role in pre-mRNA splicing or snRNP structure. Autoantibodies from patients with systemic lupus erythematosus frequently recognize epitopes on the encoded protein. Two transcript variants encoding different isoforms (B and B') have been found for this gene. [provided by RefSeq, Jul 2008]

SNRPB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.040744632).

BP6

Variant 20-2461781-G-A is Benign according to our data. Variant chr20-2461781-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 2177064.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000046 (7/152234) while in subpopulation SAS AF= 0.00104 (5/4818). AF 95% confidence interval is 0.000409. There are 0 homozygotes in gnomad4. There are 2 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SNRPB	NM_003091.4 linkuse as main transcript	c.*148C>T		3_prime_UTR_variant	7/7	ENST00000381342.7	NP_003082.1
SNRPB	NM_198216.2 linkuse as main transcript	c.698C>T	p.Pro233Leu	missense_variant	7/7		NP_937859.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SNRPB	ENST00000381342.7 linkuse as main transcript	c.*148C>T		3_prime_UTR_variant	7/7	1	NM_003091.4	ENSP00000370746	P1	P14678-2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152116

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000177

AC:

AN:

248084

Hom.:

AF XY:

0.000179

AC XY:

AN XY:

134102

show subpopulations

Gnomad AFR exome

AF:

0.0000619

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00126

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000357

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

0.0000966

AC:

141

AN:

1459234

Hom.:

Cov.:

AF XY:

0.000112

AC XY:

AN XY:

725860

show subpopulations

Gnomad4 AFR exome

AF:

0.0000898

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00114

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000297

Gnomad4 OTH exome

AF:

0.0000996

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74434

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00104

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000451

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.000222

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 05, 2023

The c.698C>T (p.P233L) alteration is located in exon 7 (coding exon 7) of the SNRPB gene. This alteration results from a C to T substitution at nucleotide position 698, causing the proline (P) at amino acid position 233 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 09, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.66

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Benign

0.88

DEOGEN2

Benign

0.35

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.65

M_CAP

Benign

0.042

MetaRNN

Benign

0.041

MetaSVM

Benign

-0.66

MutationAssessor

Benign

1.2

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-3.9

REVEL

Benign

0.17

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.42

MutPred

0.31

Loss of glycosylation at P233 (P = 0.0133);

MVP

0.46

MPC

0.69

ClinPred

0.26

GERP RS

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.44

gMVP

0.098

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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