Is CCZ1B p.Met327Val (c.979A>G) pathogenic?

CCZ1B p.Met327Val (c.979A>G) is classified Uncertain significance in CCZ1B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-08). AlphaMissense: ambiguous (0.4191); Very rare (popmax 0.000224%).

How common is CCZ1B p.Met327Val (c.979A>G) in the general population?

CCZ1B p.Met327Val (c.979A>G) is very rare (popmax 0.000224%) (gnomAD).

What do computational predictors say about CCZ1B p.Met327Val (c.979A>G)?

AlphaMissense predicts ambiguous (score 0.4191) — an in-silico prediction, not a clinical call.

CCZ1B p.Met327Val

c.979A>G · VCV4650357

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4191 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000224%)

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Computational evidence

Protein change
AlphaMissense	0.4191	ambiguous
REVEL	0.237	benign-leaning
SaProt	LLR -6.64	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 6	phastCons 1
Regional constraint	o/e 0.16	constrained · MANE · 14 kb · p 3.9e-31 · regional, not allelic
Overall
CADD	21.6	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 0.000224%

Overall 0.000224% 3/1,336,644 alleles · very rare

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: CCZ1B
Protein: p.Met327Val
Coding: c.979A>G
MANE Select: NM_198097
Type: single nucleotide variant
Location: chr7:6806013 (GRCh38)
Gene constraint: LOEUF 1.13 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 88.86 · 1 PDB

Full CCZ1B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CCZ1B p.Ala14Pro Uncertain significance ★ ⚠ same type
CCZ1B p.Ala155Gly Uncertain significance ★ ⚠ same type
CCZ1B p.Ala294Thr Uncertain significance ★ ⚠ same type
CCZ1B p.Ala323Asp Uncertain significance ★ ⚠ same type
CCZ1B p.Ala323Thr Conflicting classifications of pathogenicity ★ ⚠ same type
CCZ1B p.Ala330Gly Uncertain significance ★ ⚠ same type
CCZ1B p.Ala4Thr Uncertain significance ★ ⚠ same type
CCZ1B p.Ala8Thr 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/ccz1b-p-met327val (accessed [today's date]).

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