11-20407932-G-A

Variant names:

• chr11-20407932-G-A
• NM_005788.4:c.793G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_005788.4(PRMT3):​c.793G>A​(p.Gly265Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PRMT3 NM_005788.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.35
• Publications: 0 publications found

Genes affected

PRMT3 (HGNC:30163): (protein arginine methyltransferase 3) This gene belongs to the protein arginine methyltransferase (PRMT) family. The encoded enzyme catalyzes the methylation of guanidino nitrogens of arginyl residues of proteins. The enzyme acts on 40S ribosomal protein S2 (rpS2), which is its major in-vivo substrate, and is involved in the proper maturation of the 80S ribosome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.972

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRMT3	NM_005788.4	c.793G>A	p.Gly265Arg	missense_variant	Exon 9 of 16	ENST00000331079.11	NP_005779.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRMT3	ENST00000331079.11	c.793G>A	p.Gly265Arg	missense_variant	Exon 9 of 16	1	NM_005788.4	ENSP00000331879.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.793G>A (p.G265R) alteration is located in exon 9 (coding exon 9) of the PRMT3 gene. This alteration results from a G to A substitution at nucleotide position 793, causing the glycine (G) at amino acid position 265 to be replaced by an arginine (R). 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	0.99
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.98	D;D
M_CAP	Pathogenic	0.39	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Pathogenic	3.8	H;.
PhyloP100		7.3
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-7.3	D;D
REVEL	Pathogenic	0.86
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		1.0	D;D
Vest4		0.94
MutPred		0.85		Loss of catalytic residue at V262 (P = 0.1865);.;
MVP		0.92
MPC		0.59
ClinPred		1.0	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.64
gMVP		0.94
Mutation Taster		=60/40	polymorphism

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

Other links and lift over

hg19: chr11-20429478;