SPACI score report for 1p53 in ASTRAL 1.67:

PDB Entry: 1p53
SPACI score: 0.22
AEROSPACI score: -1.78 (disorder; see below)

Experiment type: XRAY
Resolution: 3.06
R-factor: 0.22
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.54
WCK2 WHAT_CHECK Ramachandran: -1.294
WCK3 WHAT_CHECK Chi angles: -2.979
WCK4 WHAT_CHECK Backbone: -4.43

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: "D4; putative family assignment as the region corresponding to C and C' strands is disordered; D3 and D5"

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).