Crystallographic Characterization of 12-Helical Secondary Structure in β-Peptides Containing Side Chain Groups
Soo Hyuk Choi; Ilia A. Guzei; Lara C. Spencer; Samuel H. Gellman; Journal of the American Chemical Society 132 (2010) 13879–13885; doi:10.1021/ja1062532

data_4103169
_publ_contact_author_address
;
Department of Chemistry
University of Wisconsin-Madison
1101 University Ave
Madison, WI  53706
USA
;
_publ_contact_author_email       iguzei@chem.wisc.edu
_publ_contact_author_fax         608-262-0381
_publ_contact_author_name
;
Guzei, Ilia A. 
;
_publ_contact_author_phone       608-263-4694
_publ_section_title
;
 Crystallographic Characterization of 12-Helical Secondary Structure in
 \b-Peptides Containing Side Chain Groups
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13879
_journal_page_last               13885
_journal_paper_doi               10.1021/ja1062532
_journal_volume                  132
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C40 H60 N4 O7'
_chemical_formula_sum            'C40 H60 N4 O7'
_chemical_formula_weight         708.92
_space_group_IT_number           1
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      1
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method
;
manual editing of the CIF file 
created by SHELXTL Ver. 6.10
and processed with modiCIfer-03272007. 
;
_cell_angle_alpha                94.225(5)
_cell_angle_beta                 93.287(5)
_cell_angle_gamma                112.310(5)
_cell_formula_units_Z            1
_cell_length_a                   9.491(3)
_cell_length_b                   9.624(3)
_cell_length_c                   11.899(4)
_cell_measurement_reflns_used    4756
_cell_measurement_temperature    105(2)
_cell_measurement_theta_max      27.1404
_cell_measurement_theta_min      2.2997
_cell_volume                     998.5(6)
_computing_cell_refinement       'SAINTPLUS  (Bruker-AXS, 2007)'
_computing_data_collection       'SMART Ver. 5.622 (Bruker-AXS, 2000)'
_computing_data_reduction        SAINTPLUS
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker-AXS, 2007)'
_diffrn_ambient_temperature      105(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Bruker CCD-1000 area detector'
_diffrn_measurement_method       '0.30\% \w and 0.4 \% \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           Mo-K\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0417
_diffrn_reflns_av_sigmaI/netI    0.0486
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            17224
_diffrn_reflns_theta_full        29.34
_diffrn_reflns_theta_max         29.34
_diffrn_reflns_theta_min         2.33
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9936
_exptl_absorpt_correction_T_min  0.9662
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS  (Bruker-AXS, 2007)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.179
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             384
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.482
_refine_diff_density_min         -0.210
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.7(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     467
_refine_ls_number_reflns         5316
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0650
_refine_ls_R_factor_gt           0.0513
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0850P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1215
_refine_ls_wR_factor_ref         0.1294
_reflns_number_gt                4469
_reflns_number_total             5316
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja1062532_si_003.cif
_cod_data_source_block           gellman78
_cod_original_cell_volume        998.5(5)
_cod_original_sg_symbol_Hall     'P 1         '
_cod_original_sg_symbol_H-M      'P 1 '
_cod_database_code               4103169