SPACI score report for 2co3 in ASTRAL 2.03:

PDB Entry: 2co3
SPACI score: 0.52
AEROSPACI score: 0.52 (mutant; see below)

Experiment type: XRAY
Resolution: 1.78
R-factor: 0.1837
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.147
WCK2 WHAT_CHECK Ramachandran: 1.216
WCK3 WHAT_CHECK Chi angles: -0.683
WCK4 WHAT_CHECK Backbone: 0.78

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase mutant. The full comment is: "forms swapped dimer through the extra N-terminal strand (included); mutant; automatically matched to 2CO3 A:10-142; automated match to d2co3a1"

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).