9-98056861-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_018946.4(NANS):c.53C>T(p.Pro18Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0018 in 1,612,304 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P18A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0016 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0018 ( 7 hom. )

Consequence

NANS
NM_018946.4 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:2

Conservation

PhyloP100: 7.13

Variant links:

Genes affected

NANS (HGNC:19237): (N-acetylneuraminate synthase) This gene encodes an enzyme that functions in the biosynthetic pathways of sialic acids. In vitro, the encoded protein uses N-acetylmannosamine 6-phosphate and mannose 6-phosphate as substrates to generate phosphorylated forms of N-acetylneuraminic acid (Neu5Ac) and 2-keto-3-deoxy-D-glycero-D-galacto-nononic acid (KDN), respectively; however, it exhibits much higher activity toward the Neu5Ac phosphate product. In insect cells, expression of this gene results in Neu5Ac and KDN production. This gene is related to the E. coli sialic acid synthase gene neuB, and it can partially restore sialic acid synthase activity in an E. coli neuB-negative mutant. [provided by RefSeq, Jul 2008]

NANS links:

TRIM14 (HGNC:16283): (tripartite motif containing 14) The protein encoded by this gene is a member of the tripartite motif (TRIM) family. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. The protein localizes to cytoplasmic bodies and its function has not been determined. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]

TRIM14 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.032981426).

BP6

Variant 9-98056861-C-T is Benign according to our data. Variant chr9-98056861-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 728546.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00163 (248/152354) while in subpopulation NFE AF= 0.00243 (165/68022). AF 95% confidence interval is 0.00212. There are 0 homozygotes in gnomad4. There are 130 alleles in male gnomad4 subpopulation. Median coverage is 34. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NANS	NM_018946.4 link	c.53C>T	p.Pro18Leu	missense_variant	Exon 1 of 6	ENST00000210444.6	NP_061819.2
TRIM14	XM_047424162.1 link	c.*29-21048G>A		intron_variant	Intron 6 of 6		XP_047280118.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NANS	ENST00000210444.6 link	c.53C>T	p.Pro18Leu	missense_variant	Exon 1 of 6	1	NM_018946.4	ENSP00000210444.5	Q9NR45
NANS	ENST00000480925.1 link	n.92C>T		non_coding_transcript_exon_variant	Exon 1 of 2	2
NANS	ENST00000495319.1 link	n.94C>T		non_coding_transcript_exon_variant	Exon 1 of 5	3

Frequencies

GnomAD3 genomes

AF:

0.00163

AC:

248

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00565

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00243

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.00198

AC:

487

AN:

245624

Hom.:

AF XY:

0.00202

AC XY:

270

AN XY:

133772

show subpopulations

Gnomad AFR exome

AF:

0.0000652

Gnomad AMR exome

AF:

0.000291

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00551

Gnomad NFE exome

AF:

0.00313

Gnomad OTH exome

AF:

0.00217

GnomAD4 exome

AF:

0.00182

AC:

2660

AN:

1459950

Hom.:

Cov.:

AF XY:

0.00170

AC XY:

1237

AN XY:

726366

show subpopulations

Gnomad4 AFR exome

AF:

0.0000601

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.0000768

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00552

Gnomad4 NFE exome

AF:

0.00202

Gnomad4 OTH exome

AF:

0.00184

GnomAD4 genome

AF:

0.00163

AC:

248

AN:

152354

Hom.:

Cov.:

AF XY:

0.00175

AC XY:

130

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.000289

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00565

Gnomad4 NFE

AF:

0.00243

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.00155

Hom.:

Bravo

AF:

0.00130

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00268

AC:

ExAC

AF:

0.00247

AC:

299

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

NANS-related disorder

Benign:1

Feb 18, 2020

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.53

BayesDel_addAF

Benign

-0.073

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.14

Eigen

Pathogenic

0.89

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

M_CAP

Uncertain

0.24

MetaRNN

Benign

0.033

MetaSVM

Benign

-0.35

MutationAssessor

Pathogenic

3.9

PrimateAI

Uncertain

0.70

PROVEAN

Pathogenic

-5.5

REVEL

Uncertain

0.38

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.0040

Polyphen

1.0

Vest4

0.85

MVP

0.89

MPC

0.61

ClinPred

0.21

GERP RS

5.4

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.8

Varity_R

0.69

gMVP

0.79

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

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