Genetic Variant NT5C1B:p.Ile471Val (chr2-18564038-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_033253.4(NT5C1B):c.1411A>G(p.Ile471Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,460,604 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

NT5C1B
NM_033253.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.02

Variant links:

Genes affected

NT5C1B (HGNC:17818): (5'-nucleotidase, cytosolic IB) Cytosolic 5-prime nucleotidases, such as NT5C1B, catalyze production of adenosine, which regulates diverse physiologic processes (Sala-Newby and Newby, 2001 [PubMed 11690631]).[supplied by OMIM, Mar 2008]

NT5C1B links:

NT5C1B-RDH14 (HGNC:38831): (NT5C1B-RDH14 readthrough) This locus represents naturally occurring read-through transcription between the neighboring NT5C1B (5'-nucleotidase, cytosolic IB) and RDH14 (retinol dehydrogenase 14) genes on chromosome 2. Alternative splicing results in multiple transcript variants, one of which encodes a fusion protein that shares sequence identity with the products of each individual gene. [provided by RefSeq, Nov 2010]

NT5C1B-RDH14 links:

LOC105373456 (HGNC:):

LOC105373456 links:

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ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
NT5C1B	NM_033253.4 link	c.1411A>G	p.Ile471Val	missense_variant	Exon 9 of 9	ENST00000304081.9	NP_150278.2	Q96P26-2B3KUK6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NT5C1B	ENST00000304081.9 link	c.1411A>G	p.Ile471Val	missense_variant	Exon 9 of 9	1	NM_033253.4	ENSP00000305979.4	Q96P26-2
NT5C1B-RDH14	ENST00000532967.5 link	c.1591A>G	p.Ile531Val	missense_variant	Exon 10 of 11	2		ENSP00000433415.1
NT5C1B	ENST00000406971.6 link	n.*732A>G		non_coding_transcript_exon_variant	Exon 10 of 10	5		ENSP00000383905.2	C4AM88
NT5C1B	ENST00000406971.6 link	n.*732A>G		3_prime_UTR_variant	Exon 10 of 10	5		ENSP00000383905.2	C4AM88

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

250794

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135586

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000291

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1460604

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726530

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000225

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 18, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1642A>G (p.I548V) alteration is located in exon 10 (coding exon 10) of the NT5C1B gene. This alteration results from a A to G substitution at nucleotide position 1642, causing the isoleucine (I) at amino acid position 548 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

0.18

BayesDel_addAF

Benign

-0.036

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

.;.;T

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.84

T;D;D

M_CAP

Benign

0.0087

MetaRNN

Uncertain

0.65

D;D;D

MetaSVM

Benign

-0.41

MutationAssessor

Uncertain

2.4

.;.;M

PROVEAN

Benign

-0.90

N;N;N

REVEL

Benign

0.28

Sift

Benign

0.072

T;T;T

Sift4G

Uncertain

0.0080

D;D;D

Polyphen

1.0, 1.0

.;D;D

Vest4

0.66

MutPred

0.68

Gain of sheet (P = 0.0477);.;Gain of sheet (P = 0.0477);

MVP

0.30

MPC

0.59

ClinPred

0.86

GERP RS

5.0

Varity_R

0.18

gMVP

0.63

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