SPACI score report for 2j4w in ASTRAL 1.75:

PDB Entry: 2j4w
SPACI score: 0.36
AEROSPACI score: 0.36 (mutant; see below)

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.19
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.668
WCK2 WHAT_CHECK Ramachandran: -1.28
WCK3 WHAT_CHECK Chi angles: -3.216
WCK4 WHAT_CHECK Backbone: -0.757

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; automatically matched to d1dqdl1; automatically matched to d1dqdl2; automated match to d2g2ra1; automated match to d3mbxl2"

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).