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

36OK_C

Peptidyl-prolyl cis-trans isomerase A · P62937 · RCSB 36OK · AF-P62937-F1 (v6)

0.9832

TM-score

0.9821

lDDT

0.679

Cα-RMSD Å

98.06

mean pLDDT

0.022

FRAUD score

100.0%

novelty (max id)

Per-domain breakdown

Source	Domain	Range	Residues	TM	RMSD Å	mean Cα Δ	Name
PAE	PAE:1-165	1-165	165	0.9888	0.679	0.349

All metrics

Global fold agreement

TM-score (norm. experiment)	0.9832
TM-score (norm. model)	0.9891
TM-score (norm. shorter)	0.9891
TM-score (norm. longer)	0.9832
Cα-RMSD (Å)	0.679
backbone-RMSD (Å)	0.653
all-atom-RMSD (Å)	1.2
core-RMSD (Å)	0.408
core fraction	0.994
GDT_TS	98.94
GDT_HA	95.45
MaxSub	0.9929
structural overlap (3.5 Å)	0.9939

Local, superposition-free

lDDT	0.9821
contact-map Jaccard	0.9367
contact precision	0.9718
contact recall	0.9628
distance-matrix mean Δ (Å)	0.224
CAD-score (approx)	0.9243

Backbone & secondary structure

SS agreement Q3 (%)	94.55
mean Δφ (°)	6.0
mean Δψ (°)	6.6
torsion within 30° (frac)	0.9758
Rg experiment (Å)	14.05
Rg model (Å)	14.04
ΔRg (Å)	0.02

Confidence calibration

mean pLDDT	98.06
pLDDT↔lDDT Pearson	0.7286
pLDDT↔lDDT Spearman	0.2719
PAE↔observed Pearson	0.5294
PAE overconfident frac	0.0
mean PAE (Å)	2.088
mean observed error (Å)	0.222

Context & headline

coverage of model	1.0
coverage of experiment	0.994
seq identity aligned (%)	100.0
confidently-wrong residue frac	0.0
FRAUD score	0.022

Deposited 2026-06-23 · released 2026-07-01 · X-ray · 1.21 Å · closest pre-cutoff chain: 1AK4_1