SPACI score report for 3m3a in ASTRAL 2.07:

PDB Entry: 3m3a
SPACI score: 0.62
AEROSPACI score: 0.62

Experiment type: XRAY
Resolution: 1.37
R-factor: 0.226
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -0.986
WCK2 WHAT_CHECK Ramachandran: 0.022
WCK3 WHAT_CHECK Chi angles: -3.281
WCK4 WHAT_CHECK Backbone: 1.13

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).