2-96290415-G-C

Position:

• chr2-96290415-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP5

The NM_014014.5(SNRNP200):​c.2653C>G​(p.Gln885Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. Q885Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SNRNP200 NM_014014.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 10.0

Genes affected

SNRNP200 (HGNC:30859): (small nuclear ribonucleoprotein U5 subunit 200) Pre-mRNA splicing is catalyzed by the spliceosome, a complex of specialized RNA and protein subunits that removes introns from a transcribed pre-mRNA segment. The spliceosome consists of small nuclear RNA proteins (snRNPs) U1, U2, U4, U5 and U6, together with approximately 80 conserved proteins. U5 snRNP contains nine specific proteins. This gene encodes one of the U5 snRNP-specific proteins. This protein belongs to the DEXH-box family of putative RNA helicases. It is a core component of U4/U6-U5 snRNPs and appears to catalyze an ATP-dependent unwinding of U4/U6 RNA duplices. Mutations in this gene cause autosomal-dominant retinitis pigmentosa. Alternatively spliced transcript variants encoding different isoforms have been found, but the full-length nature of these variants has not been determined. [provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain Helicase C-terminal 1 (size 237) in uniprot entity U520_HUMAN there are 15 pathogenic changes around while only 3 benign (83%) in NM_014014.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SNRNP200. . Gene score misZ 5.9363 (greater than the threshold 3.09). Trascript score misZ 8.7488 (greater than threshold 3.09). GenCC has associacion of gene with retinitis pigmentosa 33, SNRNP200-related dominant retinopathy, retinitis pigmentosa.
• PP5: Variant 2-96290415-G-C is Pathogenic according to our data. Variant chr2-96290415-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 39747.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr2-96290415-G-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SNRNP200	NM_014014.5	c.2653C>G	p.Gln885Glu	missense_variant	20/45	ENST00000323853.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SNRNP200	ENST00000323853.10	c.2653C>G	p.Gln885Glu	missense_variant	20/45	1	NM_014014.5	P1
SNRNP200	ENST00000652267.1	c.2653C>G	p.Gln885Glu	missense_variant	22/32

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Retinitis pigmentosa 33 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2012

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.48
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.14
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	T
Eigen	Uncertain	0.20
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.098	D
MetaRNN	Uncertain	0.59	D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	0.47	N
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-2.0	N
REVEL	Uncertain	0.48
Sift	Benign	0.075	T
Sift4G	Benign	0.069	T
Polyphen		0.24	B
Vest4		0.88
MutPred		0.40		Gain of helix (P = 0.0496);
MVP		0.89
MPC		1.1
ClinPred		0.64	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.30
gMVP		0.84

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

Other links and lift over

dbSNP: rs397514575; hg19: chr2-96956153;