SPACI score report for 1tab in ASTRAL 2.07:

PDB Entry: 1tab
SPACI score: 0.3
AEROSPACI score: -1.7 (disorder; see below)

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.2
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: 1.342
WCK2 WHAT_CHECK Ramachandran: -3.824
WCK3 WHAT_CHECK Chi angles: -5.707
WCK4 WHAT_CHECK Backbone: -0.855

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase disorder. The full comment is: "partly disordered"

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).