Is PKHD1 p.Pro676Ser (c.2026C>T) pathogenic?

PKHD1 p.Pro676Ser (c.2026C>T) is classified Uncertain significance in PKHD1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-23). AlphaMissense: likely benign (0.0761); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with PKHD1 p.Pro676Ser (c.2026C>T)?

PKHD1 p.Pro676Ser (c.2026C>T) is associated with Inborn genetic diseases (ClinVar).

How common is PKHD1 p.Pro676Ser (c.2026C>T) in the general population?

PKHD1 p.Pro676Ser (c.2026C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PKHD1 p.Pro676Ser (c.2026C>T)?

AlphaMissense predicts likely benign (score 0.0761) — an in-silico prediction, not a clinical call.

PKHD1 p.Pro676Ser

c.2026C>T · rs2533267306 · VCV3213754

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0761 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,614,202)

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0761	likely benign
REVEL	0.171	moderately benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1.2	GERP -4.3
Regional constraint	o/e 0.97	unconstrained · MANE · 466 kb · p 0.074 · regional, not allelic
Overall
CADD	0.224	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,614,202). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: PKHD1
Protein: p.Pro676Ser
Coding: c.2026C>T
MANE Select: NM_138694
dbSNP: rs2533267306
Type: single nucleotide variant
Location: chr6:52053190 (GRCh38)
Gene constraint: LOEUF 0.783 · pLI <0.01 (gnomAD)
Residue 676: a UniProt-annotated variant site (found in a patient affected by polycystic liver disease; uncertain significance)

Full PKHD1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PKHD1 p.Pro676Arg Benign/Likely benign ★★ same residue
PKHD1 p.Pro676His Uncertain significance ★ same residue
PKHD1 p.Trp2690Arg Pathogenic/Likely pathogenic ★★ same condition
PKHD1 c.2141-3T>C Uncertain significance ★★ same condition
PKHD1 c.880+5C>T Uncertain significance ★★ same condition
PKHD1 p.Ala1455Thr Uncertain significance ★★ ⚠ same condition
PKHD1 p.Ala182Thr Uncertain significance ★★ same condition
PKHD1 p.Ala2832Ser Uncertain significance ★★ 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/pkhd1-p-pro676ser (accessed [today's date]).

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