SPACI score report for 4p4j in ASTRAL 2.08:

WARNING! The SPACI score for this entry is not valid. The R-factor is not available and an abitrary R-factor has been used.

PDB Entry: 4p4j
SPACI score: 0.5 (not valid)
AEROSPACI score: 0.5 (not valid)

Experiment type: XRAY
Resolution: 1.66
R-factor: 0.25
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.986
WCK2 WHAT_CHECK Ramachandran: -0.741
WCK3 WHAT_CHECK Chi angles: 0.038
WCK4 WHAT_CHECK Backbone: 2.629

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).