chr3-132721995-T-C

Variant names:

• chr3-132721995-T-C
• rs747810325
• NM_153240.5:c.361A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_153240.5(NPHP3):​c.361A>G​(p.Thr121Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,460,906 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T121P) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: NPHP3 NM_153240.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.72
• Publications: 1 publications found

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

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15353432).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_153240.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHP3	NM_153240.5	MANE Select	c.361A>G	p.Thr121Ala	missense	Exon 1 of 27	NP_694972.3
	NPHP3-AS1	NR_002811.2		n.246T>C		non_coding_transcript_exon	Exon 1 of 11
	NPHP3-ACAD11	NR_037804.1		n.465A>G		non_coding_transcript_exon	Exon 1 of 45

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPHP3	ENST00000337331.10	TSL:1 MANE Select	c.361A>G	p.Thr121Ala	missense	Exon 1 of 27	ENSP00000338766.5	Q7Z494-1
	NPHP3	ENST00000383282.3	TSL:1	c.361A>G	p.Thr121Ala	missense	Exon 1 of 2	ENSP00000372769.2	Q7Z494-7
	NPHP3-AS1	ENST00000489343.5	TSL:1	n.246T>C		non_coding_transcript_exon	Exon 1 of 5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000363 AC: 9 AN: 248054 AF XY: 0.0000296

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: 0.0000466

Gnomad NFE exome AF: 0.0000359

Gnomad OTH exome AF: 0.000658

GnomAD4 exome AF: 0.0000205 AC: 30 AN: 1460906 Hom.: 0 Cov.: 31 AF XY: 0.0000179 AC XY: 13 AN XY: 726792

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26122

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.000114 AC: 6 AN: 52598

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000108 AC: 12 AN: 1111894

Other (OTH) AF: 0.000199 AC: 12 AN: 60380

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000743 AC: 9

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.050	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	21
DANN	Benign	0.73
DEOGEN2	Benign	0.20	T
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.50
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.80	T
M_CAP	Uncertain	0.094	D
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-0.43	T
MutationAssessor	Benign	0.55	N
PhyloP100		2.7
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-0.27	N
REVEL	Benign	0.19
Sift	Benign	0.29	T
Sift4G	Benign	0.25	T
Polyphen		0.022	B
Vest4		0.23
MVP		0.84
MPC		0.20
ClinPred		0.071	T
GERP RS		2.3
PromoterAI		-0.011	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.13
gMVP		0.12
Mutation Taster		=77/23	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

dbSNP: rs747810325; hg19: chr3-132440839;