SPACI score report for 1wtw in ASTRAL 2.07:

PDB Entry: 1wtw
SPACI score: 0.31
AEROSPACI score: 0.31

Experiment type: XRAY
Resolution: 2.2
R-factor: 0.229
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.62
WCK2 WHAT_CHECK Ramachandran: -3.433
WCK3 WHAT_CHECK Chi angles: -4.093
WCK4 WHAT_CHECK Backbone: -0.322

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).