Is NPHP4 p.Ile955= (c.2865C>T) pathogenic?

NPHP4 p.Ile955= (c.2865C>T) is classified Likely benign in NPHP4 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-12-14). Very rare (popmax 0.005%, amr); Associated with nephronophthisis.

What condition is associated with NPHP4 p.Ile955= (c.2865C>T)?

NPHP4 p.Ile955= (c.2865C>T) is associated with nephronophthisis (ClinVar).

How common is NPHP4 p.Ile955= (c.2865C>T) in the general population?

NPHP4 p.Ile955= (c.2865C>T) is very rare (popmax 0.005%, amr) (gnomAD).

How is Nephronophthisis inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

NPHP4 p.Ile955=

c.2865C>T · rs771271850 · VCV1161691

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.005%, amr)

Conditions

nephronophthisis

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -5	GERP -3.2
Overall
CADD	0.546	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.005% Admixed American · 3/59,986 alleles

Filtering AF 0.00378% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00345%

Overall 0.00429% 69/1,607,960 alleles · very rare exomes 67/1,455,752 · genomes 2/152,208 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.005%	19,995
European (non-Finnish)	0.00483%	20,699
Remaining individualsnot grpmax-eligible	0.00481%	20,810
East Asian	0.00445%	22,447
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,590
African / African-American	0.00267%	37,455
South Asian	0.0011%	91,042

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: NPHP4
Protein: p.Ile955=
Coding: c.2865C>T
MANE Select: NM_015102
dbSNP: rs771271850
Type: single nucleotide variant
Location: chr1:5875053 (GRCh38)
Gene constraint: LOEUF 1.183 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.44
Residue 955: the 'sufficient for basal bodies localization' region

Full NPHP4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

nephronophthisis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Nephronophthisis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Antenatal, Childhood, Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Finland)

Similar variants

NPHP4 c.2304+1G>A Pathogenic ★★ same condition
NPHP4 c.2611+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.2611+1G>C Pathogenic ★★ same condition
NPHP4 c.3644+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.3644+1G>T Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.518-2A>G Likely pathogenic ★★ same condition
NPHP4 c.992+2T>C Likely pathogenic ★★ same condition
NPHP4 p.Arg1109Ter Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/nphp4-p-ile955 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown