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

36OJ_C

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

0.9873

TM-score

0.9849

lDDT

0.404

Cα-RMSD Å

98.14

mean pLDDT

0.0186

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	164	0.9933	0.404	0.287

All metrics

Global fold agreement

TM-score (norm. experiment)	0.9873
TM-score (norm. model)	0.9873
TM-score (norm. shorter)	0.9873
TM-score (norm. longer)	0.9873
Cα-RMSD (Å)	0.404
backbone-RMSD (Å)	0.445
all-atom-RMSD (Å)	0.869
core-RMSD (Å)	0.404
core fraction	1.0
GDT_TS	99.24
GDT_HA	96.8
MaxSub	0.9933
structural overlap (3.5 Å)	1.0

Local, superposition-free

lDDT	0.9849
contact-map Jaccard	0.9475
contact precision	0.9765
contact recall	0.9696
distance-matrix mean Δ (Å)	0.204
CAD-score (approx)	0.9344

Backbone & secondary structure

SS agreement Q3 (%)	94.51
mean Δφ (°)	6.7
mean Δψ (°)	6.3
torsion within 30° (frac)	0.9756
Rg experiment (Å)	14.02
Rg model (Å)	13.99
ΔRg (Å)	0.03

Confidence calibration

mean pLDDT	98.14
pLDDT↔lDDT Pearson	0.3709
pLDDT↔lDDT Spearman	0.2397
PAE↔observed Pearson	0.1822
PAE overconfident frac	0.0
mean PAE (Å)	2.02
mean observed error (Å)	0.203

Context & headline

coverage of model	0.9939
coverage of experiment	0.9939
seq identity aligned (%)	100.0
confidently-wrong residue frac	0.0
FRAUD score	0.0186

Deposited 2026-06-23 · released 2026-07-01 · X-ray · 1.74 Å · closest pre-cutoff chain: 1AK4_1