SPACI score report for 1j4z in ASTRAL 2.07:

WARNING! The SPACI score for this entry is not valid. The PROCHECK parameters for this entry could not be obtained, and poor results have been arbitrarily assumed.

PDB Entry: 1j4z
SPACI score: 0.04 (not valid)
AEROSPACI score: 0.04 (not valid) (mutant; see below)

Experiment type: XRAY
Resolution: 3.52
R-factor: 0.291
PCK1 PROCHECK Ramachandran: N/A
PCK2 PROCHECK Chi-1 angle: N/A
WCK1 WHAT_CHECK Packing: -1.674
WCK2 WHAT_CHECK Ramachandran: -5.859
WCK3 WHAT_CHECK Chi angles: -2.517
WCK4 WHAT_CHECK Backbone: 2.758

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).