new PDB depositions vs. their blind AlphaFold predictions — a running test of "is folding solved?"

13GM_C

Charged multivesicular body protein 1a · Q9HD42 · RCSB 13GM · AF-Q9HD42-F1 (v6)

0.573
TM-score
0.8669
lDDT
32.234
Cα-RMSD Å
82.31
mean pLDDT
0.8212
FRAUD score
58.7%
novelty (max id)

Per-domain breakdown

SourceDomainRangeResiduesTMRMSD Åmean Cα ΔName
PAEPAE:1-1961-196 1630.0398 32.23429.22

All metrics

Global fold agreement

TM-score (norm. experiment)0.573
TM-score (norm. model)0.483
TM-score (norm. shorter)0.573
TM-score (norm. longer)0.483
Cα-RMSD (Å)32.234
backbone-RMSD (Å)32.29
all-atom-RMSD (Å)32.134
core-RMSD (Å)0.855
core fraction0.436
GDT_TS0.0
GDT_HA0.0
MaxSub0.0
structural overlap (3.5 Å)0.0

Local, superposition-free

lDDT0.8669
contact-map Jaccard0.5556
contact precision0.5612
contact recall0.9821
distance-matrix mean Δ (Å)22.743
CAD-score (approx)0.3429

Backbone & secondary structure

SS agreement Q3 (%)92.64
mean Δφ (°)11.9
mean Δψ (°)15.3
torsion within 30° (frac)0.8528
Rg experiment (Å)45.38
Rg model (Å)26.22
ΔRg (Å)19.16

Confidence calibration

mean pLDDT82.31
pLDDT↔lDDT Pearson0.6611
pLDDT↔lDDT Spearman0.4531
PAE↔observed Pearson0.4627
PAE overconfident frac0.3583
mean PAE (Å)14.88
mean observed error (Å)22.604

Context & headline

coverage of model0.8316
coverage of experiment1.0
seq identity aligned (%)100.0
confidently-wrong residue frac0.8528
FRAUD score0.8212

Deposited 2026-05-05 · released 2026-07-08 · EM · 3.3 Å · closest pre-cutoff chain: 3JC1_2