SPACI score report for 1drw in ASTRAL 1.55:

PDB Entry: 1drw
SPACI score: 0.35
AEROSPACI score: 0.35

Experiment type: XRAY
Resolution: 2.2
R-factor: 0.18
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.055
WCK2 WHAT_CHECK Ramachandran: -2.639
WCK3 WHAT_CHECK Chi angles: -3.495
WCK4 WHAT_CHECK Backbone: -1.396

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).