NM_015102.5:c.4270A>G

Variant names:

• chr1-5863276-T-C
• NM_015102.5:c.4270A>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_015102.5(NPHP4):​c.4270A>G​(p.Ile1424Val) 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. 17/22 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)
• Consequence: NPHP4 NM_015102.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0560
• Publications: 0 publications found

Genes affected

NPHP4 (HGNC:19104): (nephrocystin 4) This gene encodes a protein involved in renal tubular development and function. This protein interacts with nephrocystin, and belongs to a multifunctional complex that is localized to actin- and microtubule-based structures. Mutations in this gene are associated with nephronophthisis type 4, a renal disease, and with Senior-Loken syndrome type 4, a combination of nephronophthisis and retinitis pigmentosa. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2014]

NPHP4 Gene-Disease associations (from GenCC):

• nephronophthisis 4

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), G2P
• Senior-Loken syndrome 4

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• nephronophthisis 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Senior-Loken syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.061865956).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPHP4	NM_015102.5	c.4270A>G	p.Ile1424Val	missense_variant	Exon 30 of 30	ENST00000378156.9	NP_055917.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHP4	ENST00000378156.9	c.4270A>G	p.Ile1424Val	missense_variant	Exon 30 of 30	1	NM_015102.5	ENSP00000367398.4
NPHP4	ENST00000378169.7	n.*3171A>G		non_coding_transcript_exon_variant	Exon 27 of 27	1		ENSP00000367411.3
NPHP4	ENST00000489180.6	n.*2081A>G		non_coding_transcript_exon_variant	Exon 33 of 33	2		ENSP00000423747.1
NPHP4	ENST00000378169.7	n.*3171A>G		3_prime_UTR_variant	Exon 27 of 27	1		ENSP00000367411.3
NPHP4	ENST00000489180.6	n.*2081A>G		3_prime_UTR_variant	Exon 33 of 33	2		ENSP00000423747.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Aug 14, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4270A>G (p.I1424V) alteration is located in exon 30 (coding exon 29) of the NPHP4 gene. This alteration results from a A to G substitution at nucleotide position 4270, causing the isoleucine (I) at amino acid position 1424 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	0.083
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	0.086
DANN	Benign	0.74
DEOGEN2	Benign	0.081	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.086	N
LIST_S2	Benign	0.53	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.062	T
MetaSVM	Benign	-0.82	T
MutationAssessor	Benign	0.60	N
PhyloP100		-0.056
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.12	N
REVEL	Benign	0.095
Sift	Benign	0.44	T
Sift4G	Benign	0.57	T
Polyphen		0.0010	B
Vest4		0.044
MutPred		0.28		Gain of disorder (P = 0.0521);
MVP		0.27
MPC		0.057
ClinPred		0.030	T
GERP RS		0.20
Varity_R		0.021
gMVP		0.25
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

hg19: chr1-5923336;