SPACI score report for 1xmk in ASTRAL 2.07:

PDB Entry: 1xmk
SPACI score: 1.06
AEROSPACI score: 1.06

Experiment type: XRAY
Resolution: 0.97
R-factor: 0.145
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.451
WCK2 WHAT_CHECK Ramachandran: -0.111
WCK3 WHAT_CHECK Chi angles: 2.883
WCK4 WHAT_CHECK Backbone: -0.245

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).