Is CHPF p.Arg61Pro (c.182G>C) pathogenic?

CHPF p.Arg61Pro (c.182G>C) is classified Uncertain significance in CHPF (ClinVar, Single submitter, 1 submitter; last evaluated 2024-07-09). AlphaMissense: ambiguous (0.3523); Ultra-rare (popmax 0.0662%, afr).

How common is CHPF p.Arg61Pro (c.182G>C) in the general population?

CHPF p.Arg61Pro (c.182G>C) is ultra-rare (popmax 0.0662%, afr) (gnomAD).

What do computational predictors say about CHPF p.Arg61Pro (c.182G>C)?

AlphaMissense predicts ambiguous (score 0.3523) — an in-silico prediction, not a clinical call.

CHPF p.Arg61Pro

c.182G>C · VCV3492427

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3523 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0662%, afr)

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Computational evidence

Protein change
AlphaMissense	0.3523	ambiguous
REVEL	0.104	moderately benign-leaning
SaProt	LLR -5.67	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.6	GERP 1.5, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 4,044 bp · p 0.00017 · regional, not allelic
Overall
CADD	24.4	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0662% African / African-American · 47/70,974 alleles

Filtering AF 0.0512% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0458%

Overall 0.00352% 55/1,562,754 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0662%	1,510
Admixed American	0.00888%	11,266
Remaining individualsnot grpmax-eligible	0.0033%	30,324
European (non-Finnish)	8.59e-05%	1,164,247

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: CHPF
Protein: p.Arg61Pro
Coding: c.182G>C
MANE Select: NM_024536
Type: single nucleotide variant
Location: chr2:219543357 (GRCh38)
Gene constraint: LOEUF 0.954 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.57 · 2 PDB
Residue 61: the 'disordered' region

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

Similar variants

CHPF p.Glu699= Benign ★★ same type
CHPF p.Ser48Pro Benign/Likely benign ★★ same type
CHPF p.Ala206Ser Uncertain significance ★ ⚠ same type
CHPF p.Ala286Val Uncertain significance ★ ⚠ same type
CHPF p.Ala341Thr Uncertain significance ★ ⚠ same type
CHPF p.Ala343Gly Uncertain significance ★ ⚠ same type
CHPF p.Ala516Val Uncertain significance ★ ⚠ same type
CHPF p.Ala530Gly Uncertain significance ★ ⚠ same type

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/chpf-p-arg61pro (accessed [today's date]).

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