SPACI score report for 2ch4 in ASTRAL 2.07:

PDB Entry: 2ch4
SPACI score: 0.07
AEROSPACI score: 0.07

Experiment type: XRAY
Resolution: 3.5
R-factor: 0.255
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.227
WCK2 WHAT_CHECK Ramachandran: -5.683
WCK3 WHAT_CHECK Chi angles: -5.341
WCK4 WHAT_CHECK Backbone: -1.599

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).