Hydrophobic Peptide Channels and Encapsulated Water Wires
Upadhyayula S. Raghavender; Kantharaju; Subrayashastry Aravinda; Narayanaswamy Shamala; Padmanabhan Balaram; Journal of the American Chemical Society 132 (2010) 1075–1086; doi:10.1021/ja9083978

data_4101811
_publ_section_title
;
 Hydrophobic Peptide Channels and Encapsulated Water Wires
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1075
_journal_page_last               1086
_journal_paper_doi               10.1021/ja9083978
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C27 H47 N5 O8'
_chemical_formula_weight         569.70
_chemical_name_common            Boc-Pro-Aib-D-Ala-Aib-D-Val-OMe
_chemical_name_systematic
; 
  t-Butyloxycarbonyl-prolyl-alpha-aminoisobutyryl
-D-alanyl-alpha-aminoisobutyryl-D-valyl-methyl ester
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2528(12)
_cell_length_b                   15.7498(16)
_cell_length_c                   16.6866(16)
_cell_measurement_temperature    293(2)
_cell_volume                     3220.2(5)
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.953
_diffrn_measured_fraction_theta_max 0.953
_diffrn_measurement_device_type  'BRUKER AXS SMART APEX CCD with Mo source'
_diffrn_measurement_method       'omega scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0210
_diffrn_reflns_av_sigmaI/netI    0.0145
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            24728
_diffrn_reflns_theta_full        26.91
_diffrn_reflns_theta_max         26.91
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'color less'
_exptl_crystal_density_diffrn    1.175
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rods
_exptl_crystal_F_000             1232
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.227
_refine_diff_density_min         -0.169
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    'riding over the heavy atom'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     361
_refine_ls_number_reflns         3708
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0590
_refine_ls_R_factor_gt           0.0473
_refine_ls_shift/su_max          0.127
_refine_ls_shift/su_mean         0.020
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0865P)^2^+0.4158P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1278
_refine_ls_wR_factor_ref         0.1380
_reflns_number_gt                3095
_reflns_number_total             3708
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9083978_si_004.cif
_cod_data_source_block           puda5
_cod_database_code               4101811