SPACI score report for 1ddn in ASTRAL 2.07:

PDB Entry: 1ddn
SPACI score: 0.16
AEROSPACI score: 0.16 (mutant; see below)

Experiment type: XRAY
Resolution: 3
R-factor: 0.24
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -0.479
WCK2 WHAT_CHECK Ramachandran: -4.741
WCK3 WHAT_CHECK Chi angles: -5.159
WCK4 WHAT_CHECK Backbone: 0.834

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: "protein/DNA complex; complexed with ni; 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).