SPACI score report for 1ibx in ASTRAL 1.57:

WARNING! The SPACI score for this entry is not valid. This is not an X-ray structure, so the resolution and R-factor listed may be arbitrary and not valid. The resolution is not available. An arbitrary resolution has been used. The R-factor is not available and an abitrary R-factor has been used.

PDB Entry: 1ibx
SPACI score: 0.09 (not valid)
AEROSPACI score: -1.91 (not valid) (mutant; see below)

Experiment type: NMR10
Resolution: 3.8
R-factor: 0.25
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -5.225
WCK2 WHAT_CHECK Ramachandran: -4.884
WCK3 WHAT_CHECK Chi angles: -3.403
WCK4 WHAT_CHECK Backbone: -0.959

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOP contain the phrase mutant. The full comment is: "mutant; chimera with B1 domain of streptococcal protein G (disordered)"

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).