5-6610958-C-G

Variant names:

• chr5-6610958-C-G
• rs1056148130
• NM_017755.6:c.1223G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_017755.6(NSUN2):​c.1223G>C​(p.Arg408Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,766 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R408Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NSUN2 NM_017755.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.33
• Publications: 0 publications found

Genes affected

NSUN2 (HGNC:25994): (NOP2/Sun RNA methyltransferase 2) This gene encodes a methyltransferase that catalyzes the methylation of cytosine to 5-methylcytosine (m5C) at position 34 of intron-containing tRNA(Leu)(CAA) precursors. This modification is necessary to stabilize the anticodon-codon pairing and correctly translate the mRNA. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene.[provided by RefSeq, Mar 2011]

LINC01018 (HGNC:27394): (long intergenic non-protein coding RNA 1018)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.888

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NSUN2	NM_017755.6	c.1223G>C	p.Arg408Pro	missense_variant	Exon 11 of 19	ENST00000264670.11	NP_060225.4
NSUN2	NM_001193455.2	c.1118G>C	p.Arg373Pro	missense_variant	Exon 10 of 18		NP_001180384.1
NSUN2	NR_037947.2	n.1203G>C		non_coding_transcript_exon_variant	Exon 10 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NSUN2	ENST00000264670.11	c.1223G>C	p.Arg408Pro	missense_variant	Exon 11 of 19	1	NM_017755.6	ENSP00000264670.6

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461766 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727190

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111928

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.45	T;.
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.017	T
MetaRNN	Pathogenic	0.89	D;D
MetaSVM	Benign	-0.71	T
MutationAssessor	Benign	1.6	L;.
PhyloP100		4.3
PrimateAI	Uncertain	0.58	T
PROVEAN	Pathogenic	-5.3	D;D
REVEL	Uncertain	0.40
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.031	D;D
Polyphen		0.97	D;.
Vest4		0.93
MutPred		0.55		Gain of sheet (P = 0.0149);.;
MVP		0.82
MPC		0.39
ClinPred		0.98	D
GERP RS		5.6
Varity_R		0.84
gMVP		0.88
Mutation Taster		=23/77	disease causing

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

dbSNP: rs1056148130; hg19: chr5-6611071;