Is CCDC93 p.Arg184His (c.551G>A) pathogenic?

CCDC93 p.Arg184His (c.551G>A) is classified Uncertain significance in CCDC93 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-07-25). AlphaMissense: likely benign (0.1451); Ultra-rare (popmax 0.0165%, sas).

How common is CCDC93 p.Arg184His (c.551G>A) in the general population?

CCDC93 p.Arg184His (c.551G>A) is ultra-rare (popmax 0.0165%, sas) (gnomAD).

What do computational predictors say about CCDC93 p.Arg184His (c.551G>A)?

AlphaMissense predicts likely benign (score 0.1451) — an in-silico prediction, not a clinical call.

CCDC93 p.Arg184His

c.551G>A · rs773023570 · VCV2594784

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1451 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1451	likely benign
REVEL	0.278	benign-leaning
SaProt	LLR -8.62	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 2.5, phastCons 1
Regional constraint	o/e 0.90	unconstrained · MANE · 94 kb · p 0.0042 · regional, not allelic
Overall
CADD	25.1	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 and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% South Asian · 15/91,046 alleles

Filtering AF 0.0101% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00811%

Overall 0.00223% 36/1,612,886 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0165%	6,070
Middle Eastern	0.0164%	6,080
African / African-American	0.00401%	24,941
European (non-Finnish)	0.00144%	69,370

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: CCDC93
Protein: p.Arg184His
Coding: c.551G>A
MANE Select: NM_019044
dbSNP: rs773023570
Type: single nucleotide variant
Location: chr2:117986038 (GRCh38)
Gene constraint: LOEUF 0.986 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.49 · 4 PDB
Residue 184: the 'sufficient for interaction with ccdc22' region; a β-strand

Full CCDC93 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CCDC93 p.Pro228Leu Benign ★★ same type
CCDC93 p.Ala226Val Uncertain significance ★ ⚠ same type
CCDC93 p.Ala262Thr Uncertain significance ★ ⚠ same type
CCDC93 p.Ala272Thr Uncertain significance ★ ⚠ same type
CCDC93 p.Ala370Thr Uncertain significance ★ ⚠ same type
CCDC93 p.Ala510Thr Uncertain significance ★ ⚠ same type
CCDC93 p.Ala628Val Uncertain significance ★ ⚠ same type
CCDC93 p.Arg126Gly 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/ccdc93-p-arg184his (accessed [today's date]).

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