SPACI score report for 3c3f in ASTRAL 2.08:

WARNING! The SPACI score for this entry is not valid. The WHAT_CHECK parameters for this entry could not be obtained, and poor results have been arbitrarily assumed.

PDB Entry: 3c3f
SPACI score: 0.41 (not valid)
AEROSPACI score: 0.41 (not valid)

Experiment type: XRAY
Resolution: 2
R-factor: 0.189
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -1.212
WCK2 WHAT_CHECK Ramachandran: -2.341
WCK3 WHAT_CHECK Chi angles: -0.194
WCK4 WHAT_CHECK Backbone: N/A

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).