chr19-49061477-T-C

Position:

• chr19-49061477-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP3 PP5_Moderate

The NM_006179.5(NTF4):​c.521A>G​(p.Gln174Arg) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NTF4 NM_006179.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.67

Genes affected

NTF4 (HGNC:8024): (neurotrophin 4) This gene is a member of a family of neurotrophic factors, neurotrophins, that control survival and differentiation of mammalian neurons. The expression of this gene is ubiquitous and less influenced by environmental signals. While knock-outs of other neurotrophins including nerve growth factor, brain-derived neurotrophic factor, and neurotrophin 3 prove lethal during early postnatal development, NTF5-deficient mice only show minor cellular deficits and develop normally to adulthood. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.763
• PP5: Variant 19-49061477-T-C is Pathogenic according to our data. Variant chr19-49061477-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 208763.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NTF4	NM_006179.5	c.521A>G	p.Gln174Arg	missense_variant	2/2	ENST00000593537.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NTF4	ENST00000593537.2	c.521A>G	p.Gln174Arg	missense_variant	2/2		NM_006179.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 08, 2014

The c.521A>G (p.Q174R) alteration is located in exon 2 (coding exon 1) of the NTF4 gene. This alteration results from a A to G substitution at nucleotide position 521, causing the glutamine (Q) at amino acid position 174 to be replaced by an arginine (R). Based on data from the NHLBI Exome Sequencing Project (ESP), the NTF4 c.521A>G alteration was not observed among 6,493 individuals tested (0.0%). Allele frequency data for this nucleotide position are not currently available from the 1000 Genomes Project and the alteration is not currently listed in the Database of Single Nucleotide Polymorphisms (dbSNP). Though some variants may appear to be rare due to database-specific ethnic underrepresentation, rare missense alleles commonly exhibit a deleterious effect on protein function (Kryukov, 2007; Tennessen, 2012). IF USED, PULL THESE INTO REFERENCES: Kryukov GV, et al. (2007) Am J Hum Genet 80:727-739. Tennessen JA, et al. (2012) Science 337(64):64-69. The Q174 amino acid position is highly conserved in available vertebrate species. This alteration is predicted to be probably damaging and deleterious by PolyPhen and SIFT in silico analyses, respectively. Based on the available evidence, this alteration is classified as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.46	T
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.087	D
MetaRNN	Pathogenic	0.76	D
MetaSVM	Uncertain	-0.13	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.74	T
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.70
MutPred		0.66		Gain of MoRF binding (P = 0.0724);
MVP		0.83
ClinPred		0.95	D
GERP RS		3.3
Varity_R		0.35
gMVP		0.69

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs797044939; hg19: chr19-49564734;