SPACI score report for 1ydz in ASTRAL 1.75:

PDB Entry: 1ydz
SPACI score: 0.25
AEROSPACI score: 0.25

Experiment type: XRAY
Resolution: 3.3
R-factor: 0.127
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.051
WCK2 WHAT_CHECK Ramachandran: -3.112
WCK3 WHAT_CHECK Chi angles: -5.598
WCK4 WHAT_CHECK Backbone: 0.355

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).