SPACI score report for 1p3q in ASTRAL 1.73:

PDB Entry: 1p3q
SPACI score: 0.47
AEROSPACI score: -1.53 (disorder; see below)

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.26
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 2.142
WCK2 WHAT_CHECK Ramachandran: 0.132
WCK3 WHAT_CHECK Chi angles: 0.1
WCK4 WHAT_CHECK Backbone: -3.285

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOP contain the phrase disorder. The full comment is: "partly disordered, helix-swapped homodimer; annotated as bovine in PDB, identical to human sequence"

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).