SPACI score report for 1a4k in ASTRAL 2.05:

PDB Entry: 1a4k
SPACI score: 0.3
AEROSPACI score: 0.3

Experiment type: XRAY
Resolution: 2.4
R-factor: 0.211
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.648
WCK2 WHAT_CHECK Ramachandran: -2.038
WCK3 WHAT_CHECK Chi angles: -4.522
WCK4 WHAT_CHECK Backbone: -0.234

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).