HETEROGEN Entry 1N2B and this entry (1N2E) are two different experiments that together indicate ...HETEROGEN Entry 1N2B and this entry (1N2E) are two different experiments that together indicate that AMPCPP and pantoate cannot occupy the same active site simultaneously. The crystal for entry 1N2E was soaked in pantoate and AMPCPP overnight, and partial occupancy of AMPCPP and pantoate in subunit A was observed. The crystal for entry 1N2B was soaked in twice concentration of pantoate and same concentration of AMPCPP for over 24 hours, and this gave higher occupancy of pantoate, but lower occupancy of AMPCPP in subunit A. Both entries have full occupancy of AMPCPP in subunit B with a glycerol at the pantoate binding site. The structural difference between the two entries is higher occupancy of pantoate and lower occupancy of AMPCPP in subunit A of 1N2B relative to that of 1N2E.
Remark 999
SEQUENCE RESIDUE 2 IS AN ALANINE IN THE SEQUENCE. MUTATION OF THIS RESIDUE WAS NECESSARY TO ... SEQUENCE RESIDUE 2 IS AN ALANINE IN THE SEQUENCE. MUTATION OF THIS RESIDUE WAS NECESSARY TO GENERATE AN NCOI RESTRICTION SITE FOR CLONING INTO THE EXPRESSION VECTOR PET30A. THE LAST 9 RESIDUES AFTER ARG300 WERE CLEAVED OFF BY ENTEROKINASE DIGESTION (UNINTENTIONALLY), WHICH WAS CARRIED OUT TO CLEAVE THE N-TERMINAL TAG FROM THE RECOMBINANT PROTEIN.
解像度: 1.6→19.82 Å / Rfactor Rfree error: 0.003 / Isotropic thermal model: RESTRAINED / 交差検証法: THROUGHOUT / σ(F): 0 / 立体化学のターゲット値: Engh & Huber 詳細: full occupancy of AMPCPP in subunit B, partial occupancy of AMPCPP and pantoate in subunit A, at 1.6 A resolution.