4-2938899-G-C

Position:

• chr4-2938899-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001291978.2(NOP14):​c.2506C>G​(p.Leu836Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,832 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: NOP14 NM_001291978.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.88

Genes affected

NOP14 (HGNC:16821): (NOP14 nucleolar protein) This gene encodes a protein that plays a role in pre-18s rRNA processing and small ribosomal subunit assembly. The encoded protein may be involved in the regulation of pancreatic cancer cell proliferation and migration. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

NOP14-AS1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NOP14	NM_001291978.2	c.2506C>G	p.Leu836Val	missense_variant	18/18	ENST00000416614.7	NP_001278907.1
NOP14	NM_003703.3	c.2506C>G	p.Leu836Val	missense_variant	18/19		NP_003694.1
NOP14	NM_001291979.2	c.2307-572C>G		intron_variant			NP_001278908.1
NOP14-AS1	NR_015453.2	n.2697+107G>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NOP14	ENST00000416614.7	c.2506C>G	p.Leu836Val	missense_variant	18/18	1	NM_001291978.2	ENSP00000405068.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461832 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727212

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Apr 01, 2024

The c.2506C>G (p.L836V) alteration is located in exon 18 (coding exon 18) of the NOP14 gene. This alteration results from a C to G substitution at nucleotide position 2506, causing the leucine (L) at amino acid position 836 to be replaced by a valine (V). 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	Benign	0.31
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0059	T;T
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.91
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	.;D
M_CAP	Benign	0.027	D
MetaRNN	Uncertain	0.72	D;D
MetaSVM	Benign	-0.73	T
MutationAssessor	Uncertain	2.2	M;M
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.98	N;N
REVEL	Uncertain	0.40
Sift	Benign	0.031	D;D
Sift4G	Uncertain	0.012	D;D
Polyphen		1.0	D;D
Vest4		0.57
MutPred		0.60		Loss of ubiquitination at K834 (P = 0.0556);Loss of ubiquitination at K834 (P = 0.0556);
MVP		0.62
MPC		0.43
ClinPred		0.98	D
GERP RS		6.0
Varity_R		0.28
gMVP		0.22

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: chr4-2940626;