SPACI score report for 1yl4 in ASTRAL 2.06:

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: 1yl4
SPACI score: -0.11 (not valid)
AEROSPACI score: -0.11 (not valid)

Experiment type: XRAY
Resolution: 5.5
R-factor: 0.307
PCK1 PROCHECK Ramachandran: N/A
PCK2 PROCHECK Chi-1 angle: N/A
WCK1 WHAT_CHECK Packing: -4.55
WCK2 WHAT_CHECK Ramachandran: -8.201
WCK3 WHAT_CHECK Chi angles: -6.168
WCK4 WHAT_CHECK Backbone: -2.423

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).