Genetic Variant NPHP3:c.393+127C>T (chr3-132721836-G-A) – ACMG Classification: Benign (-14 pts)

Variant summary

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

The NM_153240.5(NPHP3):c.393+127C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000703 in 1,123,884 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0030 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 1 hom. )

Consequence

NPHP3
NM_153240.5 intron

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.102

Variant links:

Genes affected

NPHP3 (HGNC:7907): (nephrocystin 3) This gene encodes a protein containing a coiled-coil (CC) domain, a tubulin-tyrosine ligase (TTL) domain, and a tetratrico peptide repeat (TPR) domain. The encoded protein interacts with nephrocystin, it is required for normal ciliary development, and it functions in renal tubular development. Mutations in this gene are associated with nephronophthisis type 3, and also with renal-hepatic-pancreatic dysplasia, and Meckel syndrome type 7. Naturally occurring read-through transcripts exist between this gene and the downstream ACAD11 (acyl-CoA dehydrogenase family, member 11) gene. [provided by RefSeq, Feb 2011]

NPHP3 links:

NPHP3-AS1 (HGNC:24129): (NPHP3 antisense RNA 1)

NPHP3-AS1 links:

NPHP3-ACAD11 (HGNC:48351): (NPHP3-ACAD11 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring NPHP3 (nephronophthisis 3, adolescent) and ACAD11 (acyl-CoA dehydrogenase family, member 11) genes on chromosome 3. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Feb 2011]

NPHP3-ACAD11 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 3-132721836-G-A is Benign according to our data. Variant chr3-132721836-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1207810.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00297 (453/152298) while in subpopulation AFR AF= 0.0105 (436/41558). AF 95% confidence interval is 0.00968. There are 2 homozygotes in gnomad4. There are 224 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
NPHP3	NM_153240.5 link	c.393+127C>T	intron_variant	Intron 1 of 26	ENST00000337331.10	NP_694972.3	Q7Z494-1
NPHP3-AS1	NR_002811.2 link	n.87G>A	non_coding_transcript_exon_variant	Exon 1 of 11
NPHP3-AS1	NR_152743.1 link	n.87G>A	non_coding_transcript_exon_variant	Exon 1 of 5
NPHP3-ACAD11	NR_037804.1 link	n.497+127C>T	intron_variant	Intron 1 of 44

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPHP3	ENST00000337331.10 link	c.393+127C>T		intron_variant	Intron 1 of 26	1	NM_153240.5	ENSP00000338766.5		Q7Z494-1

Frequencies

GnomAD3 genomes

AF:

0.00294

AC:

447

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0104

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:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.000956

GnomAD4 exome

AF:

0.000347

AC:

337

AN:

971586

Hom.:

Cov.:

AF XY:

0.000305

AC XY:

151

AN XY:

495078

show subpopulations

Gnomad4 AFR exome

AF:

0.0111

Gnomad4 AMR exome

AF:

0.000575

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000142

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000313

Gnomad4 OTH exome

AF:

0.000748

GnomAD4 genome

AF:

0.00297

AC:

453

AN:

152298

Hom.:

Cov.:

AF XY:

0.00301

AC XY:

224

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.0105

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.00270

Hom.:

Bravo

AF:

0.00347

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Jul 15, 2018

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

6.8

DANN

Benign

0.91

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