SPACI score report for 1r6z in ASTRAL 2.02:

PDB Entry: 1r6z
SPACI score: 0.24
AEROSPACI score: -1.76 (chimer; see below)

Experiment type: XRAY
Resolution: 2.8
R-factor: 0.227
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.231
WCK2 WHAT_CHECK Ramachandran: -3.184
WCK3 WHAT_CHECK Chi angles: -2.484
WCK4 WHAT_CHECK Backbone: -0.233

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase chimer. The full comment is: "fused with MBP; chimera with a PAZ domain"

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).