SPACI score report for 3mnc in ASTRAL 2.07:

PDB Entry: 3mnc
SPACI score: 0.93
AEROSPACI score: 0.93

Experiment type: XRAY
Resolution: 1.12
R-factor: 0.117
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 2.385
WCK2 WHAT_CHECK Ramachandran: -0.248
WCK3 WHAT_CHECK Chi angles: 0.477
WCK4 WHAT_CHECK Backbone: 1.357

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).