SPACI score report for 1a6p in ASTRAL 1.55:

PDB Entry: 1a6p
SPACI score: 0.42
AEROSPACI score: 0.42 (mutant; see below)

Experiment type: XRAY
Resolution: 2.08
R-factor: 0.2186
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.609
WCK2 WHAT_CHECK Ramachandran: -0.935
WCK3 WHAT_CHECK Chi angles: 1.216
WCK4 WHAT_CHECK Backbone: 1.698

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: "misfolded V (N-terminal) domain dimer; 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).