chr4-122893166-C-A

Position:

• chr4-122893166-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_007083.5(NUDT6):​c.613G>T​(p.Val205Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NUDT6 NM_007083.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.27

Genes affected

NUDT6 (HGNC:8053): (nudix hydrolase 6) This gene overlaps and lies on the opposite strand from FGF2 gene, and is thought to be the FGF2 antisense gene. The two genes are independently transcribed, and their expression shows an inverse relationship, suggesting that this antisense transcript may regulate FGF2 expression. This gene has also been shown to have hormone-regulatory and antiproliferative actions in the pituitary that are independent of FGF2 expression. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

FGF2 (HGNC:3676): (fibroblast growth factor 2) The protein encoded by this gene is a member of the fibroblast growth factor (FGF) family. FGF family members bind heparin and possess broad mitogenic and angiogenic activities. This protein has been implicated in diverse biological processes, such as limb and nervous system development, wound healing, and tumor growth. The mRNA for this gene contains multiple polyadenylation sites, and is alternatively translated from non-AUG (CUG) and AUG initiation codons, resulting in five different isoforms with distinct properties. The CUG-initiated isoforms are localized in the nucleus and are responsible for the intracrine effect, whereas, the AUG-initiated form is mostly cytosolic and is responsible for the paracrine and autocrine effects of this FGF. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2730694).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NUDT6	NM_007083.5	c.613G>T	p.Val205Phe	missense_variant	5/5	ENST00000304430.10	NP_009014.2
FGF2	NM_001361665.2	c.*770C>A		3_prime_UTR_variant	3/3	ENST00000644866.2	NP_001348594.1
NUDT6	NM_198041.3	c.106G>T	p.Val36Phe	missense_variant	5/5		NP_932158.1
FGF2	NM_002006.6	c.*770C>A		3_prime_UTR_variant	3/3		NP_001997.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NUDT6	ENST00000304430.10	c.613G>T	p.Val205Phe	missense_variant	5/5	1	NM_007083.5	ENSP00000306070	P1
FGF2	ENST00000644866.2	c.*770C>A		3_prime_UTR_variant	3/3		NM_001361665.2	ENSP00000494222	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461792 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727194

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00

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

Jan 23, 2023

The c.613G>T (p.V205F) alteration is located in exon 5 (coding exon 5) of the NUDT6 gene. This alteration results from a G to T substitution at nucleotide position 613, causing the valine (V) at amino acid position 205 to be replaced by a phenylalanine (F). 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	0.25
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.13	T;.;.
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.30
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.85	D;.;D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.27	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.78	N;.;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-2.2	N;D;D
REVEL	Benign	0.23
Sift	Uncertain	0.0050	D;D;D
Sift4G	Benign	0.071	T;T;T
Polyphen		0.99	D;.;.
Vest4		0.13
MutPred		0.68		Loss of sheet (P = 0.0181);.;.;
MVP		0.26
MPC		0.15
ClinPred		0.65	D
GERP RS		2.7
Varity_R		0.74
gMVP		0.61

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

Other links and lift over

dbSNP: rs201458145; hg19: chr4-123814321;