BOTH THE HIV-1 PROTEASE COVALENT DIMER [L-ALA51,D-ALA51'] (CHAINS A AND B) AND JG-365 INHIBITOR ...BOTH THE HIV-1 PROTEASE COVALENT DIMER [L-ALA51,D-ALA51'] (CHAINS A AND B) AND JG-365 INHIBITOR (CHAINS C AND D) WERE CHEMICALLY SYNTHESIZED WITH NON-NATURAL AMINO ACIDS INTRODUCED AT SEVERAL POSITIONS. THE HIV-1 PROTEASE DIMER HAS TWO COVALENTLY LINKED MONOMER PARTS, RESIDUES 1-99 AND RESIDUES 105-203, BOTH REPRESENTING ANALOGUE OF HIV-1 PROTEASE CORRESPONDING TO THE RESIDUES 491-589 OF UNP ENTRY P03369. THE REGION 1-99 OF THE FIRST HALF AND 105-203 OF THE SECOND HALF SHARE THE SAME SEQUENCE EXCEPT FOR THE 51ST RESIDUE, WHICH IS L-ALA(ALA51) IN REGION 1-99 AND D-ALA (DAL155) IN REGION 105-203. THERE IS A SHORT LINKER REGION (RESIDUES 100-104). THE TWO REGIONS (HALVES) ARE RELATED BY INTRA-MOLECULAR PSEUDO-2-FOLD SYMMETRY, I.E. REGIONS 1-99 AND 105-203 HAVE SIMILAR STRUCTURES BUT DO NOT SUPERIMPOSE COMPLETELY. MOREOVER, THERE IS A DISORDER WITH RESPECT TO THE NON-CRYSTALLOGRAPHIC PSEUDO-2-FOLD SYMMETRY AXIS OF THE COVELENT DIMER HIV-1 PROTEASE. SUCH CONCLUSION IS BASED ON THE SPLIT OF THE DENSITY AT THE BETA-TURN REGIONS FOR RESIDUES 49-52 AND 153-156, ALTHOUGH THE IS NO DENSITY SPLIT BETWEEN TWO CONFORMERS FOR MOST OF THE ATOMS. TO ACCOUNT FOR SUCH DISORDER, CHAINS A AND B, EACH REPRESENTING THE SAME 203-AMINO ACID RESIDUE COVALENT DIMER HIV-1 PROTEASE WERE INTRODUCED IN THE STRUCTURE SOLUTION. SO WERE CHAINS C AND D FOR THE PEPTIDOMIMETIC JG-365 INHIBITOR, WHERE CHAIN C OF INHIBITOR CORRESPONDS TO THE MODEL A OF THE COVELENT DIMER HIV-1 PROTEASE AND CHAIN D CORRESPONDS TO MODEL B. THESE TWO MODELS, OR TWO CONFORMATIONS OF ONE POLYMER CHAIN ARE RELATED TO EACH OTHER BY PSEUDO-2-FOLD SYMMETRY. THE OCCUPANCIES WERE DETERMINED TO BE 0.65 FOR CHAINS A AND C AND 0.35 FOR CHAINS B AND D, RESPECTIVELY.
解像度: 1.8→20 Å / Cor.coef. Fo:Fc: 0.948 / Cor.coef. Fo:Fc free: 0.929 / SU B: 5.486 / SU ML: 0.086 / TLS residual ADP flag: LIKELY RESIDUAL / 交差検証法: THROUGHOUT / ESU R: 0.153 / ESU R Free: 0.144 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. SEE REMARK 999 FOR THE SPECIAL STRUCTURAL SOLUTION
Rfactor
反射数
%反射
Selection details
Rfree
0.23682
883
5.1 %
RANDOM
Rwork
0.18778
-
-
-
obs
0.19016
16579
99.9 %
-
all
-
16579
-
-
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: BABINET MODEL WITH MASK