rs77533254

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_153240.5(NPHP3):​c.1986G>T​(p.Arg662Ser) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000763 in 1,441,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R662T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000076 ( 0 hom. )

Consequence

NPHP3
NM_153240.5 missense, splice_region

Scores

6
8
5
Splicing: ADA: 0.9992
2

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.70

Publications

1 publications found
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-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]

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP3
Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
NPHP3NM_153240.5 linkc.1986G>T p.Arg662Ser missense_variant, splice_region_variant Exon 14 of 27 ENST00000337331.10 NP_694972.3 Q7Z494-1
NPHP3-ACAD11NR_037804.1 linkn.1992G>T splice_region_variant, non_coding_transcript_exon_variant Exon 13 of 45

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
NPHP3ENST00000337331.10 linkc.1986G>T p.Arg662Ser missense_variant, splice_region_variant Exon 14 of 27 1 NM_153240.5 ENSP00000338766.5 Q7Z494-1

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD2 exomes
AF:
0.00000402
AC:
1
AN:
248506
AF XY:
0.00
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.00000887
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000763
AC:
11
AN:
1441250
Hom.:
0
Cov.:
27
AF XY:
0.00000835
AC XY:
6
AN XY:
718480
show subpopulations
African (AFR)
AF:
0.00
AC:
0
AN:
33038
American (AMR)
AF:
0.00
AC:
0
AN:
44662
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
25982
East Asian (EAS)
AF:
0.00
AC:
0
AN:
39494
South Asian (SAS)
AF:
0.00
AC:
0
AN:
85670
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
51278
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5558
European-Non Finnish (NFE)
AF:
0.0000100
AC:
11
AN:
1095820
Other (OTH)
AF:
0.00
AC:
0
AN:
59748
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.489
Heterozygous variant carriers
0
1
2
4
5
6
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Variant carriers
0
2
4
6
8
10
<30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
65-70
70-75
75-80
>80
Age
GnomAD4 genome
Cov.:
33
Alfa
AF:
0.00
Hom.:
21
EpiCase
AF:
0.0000545
EpiControl
AF:
0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.96
BayesDel_addAF
Pathogenic
0.29
D
BayesDel_noAF
Pathogenic
0.18
CADD
Pathogenic
31
DANN
Uncertain
1.0
DEOGEN2
Benign
0.28
T
Eigen
Uncertain
0.49
Eigen_PC
Uncertain
0.45
FATHMM_MKL
Pathogenic
0.98
D
LIST_S2
Benign
0.85
T
M_CAP
Uncertain
0.13
D
MetaRNN
Pathogenic
0.78
D
MetaSVM
Uncertain
-0.083
T
MutationAssessor
Benign
1.4
L
PhyloP100
2.7
PrimateAI
Uncertain
0.70
T
PROVEAN
Benign
-1.3
N
REVEL
Uncertain
0.53
Sift
Uncertain
0.0040
D
Sift4G
Pathogenic
0.0
D
Polyphen
1.0
D
Vest4
0.72
MutPred
0.47
Loss of helix (P = 0.0167);
MVP
0.81
MPC
0.45
ClinPred
0.88
D
GERP RS
3.3
Varity_R
0.38
gMVP
0.55
Mutation Taster
=38/62
disease causing

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
1.0
dbscSNV1_RF
Pathogenic
0.96
SpliceAI score (max)
0.15
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

Other links and lift over

dbSNP: rs77533254; hg19: chr3-132416206; API