SPACI score report for 1a98 in ASTRAL 2.08:

PDB Entry: 1a98
SPACI score: 0.38
AEROSPACI score: 0.38 (mutant; see below)

Experiment type: XRAY
Resolution: 2.25
R-factor: 0.21
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.143
WCK2 WHAT_CHECK Ramachandran: -1.187
WCK3 WHAT_CHECK Chi angles: -0.537
WCK4 WHAT_CHECK Backbone: 3.448

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: "mutant"

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).