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

13FL_C

Programmed cell death 1 ligand 1 · Q9NZQ7 · RCSB 13FL · AF-Q9NZQ7-F1 (v6)

0.9756
TM-score
0.9678
lDDT
0.659
Cα-RMSD Å
96.09
mean pLDDT
0.0338
FRAUD score
96.8%
novelty (max id)

Per-domain breakdown

SourceDomainRangeResiduesTMRMSD Åmean Cα ΔName
PAEPAE:1-2901-290 1150.9755 0.6590.532

All metrics

Global fold agreement

TM-score (norm. experiment)0.9756
TM-score (norm. model)0.3924
TM-score (norm. shorter)0.9756
TM-score (norm. longer)0.3924
Cα-RMSD (Å)0.659
backbone-RMSD (Å)0.624
all-atom-RMSD (Å)1.233
core-RMSD (Å)0.569
core fraction0.983
GDT_TS97.61
GDT_HA88.7
MaxSub0.9755
structural overlap (3.5 Å)1.0

Local, superposition-free

lDDT0.9678
contact-map Jaccard0.9333
contact precision0.9692
contact recall0.9618
distance-matrix mean Δ (Å)0.3
CAD-score (approx)0.8872

Backbone & secondary structure

SS agreement Q3 (%)93.91
mean Δφ (°)11.9
mean Δψ (°)9.3
torsion within 30° (frac)0.9217
Rg experiment (Å)13.53
Rg model (Å)13.57
ΔRg (Å)0.04

Confidence calibration

mean pLDDT96.09
pLDDT↔lDDT Pearson0.155
pLDDT↔lDDT Spearman0.172
PAE↔observed Pearson0.2347
PAE overconfident frac0.0
mean PAE (Å)2.544
mean observed error (Å)0.297

Context & headline

coverage of model0.3966
coverage of experiment1.0
seq identity aligned (%)99.13
confidently-wrong residue frac0.0
FRAUD score0.0338

Deposited 2026-05-04 · released 2026-06-03 · X-ray · 2.22 Å · closest pre-cutoff chain: 5XXY_3