Protein secondary structure mimetics: crystal conformations of α/γ4-hybrid peptide12-helices with proteinogenic side chains and their analogy with α- and β-peptide helices.
Jadhav, Sandip V.; Bandyopadhyay, Anupam; Gopi, Hosahudya N.; Organic & biomolecular chemistry 11 (2013) 509–514; doi:10.1039/c2ob26805a

data_7152774
_publ_section_title
;
 Protein secondary structure mimetics: crystal conformations of
 \a/\g4-hybrid peptide12-helices with proteinogenic side chains and their
 analogy with \a- and \b-peptide helices.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              509
_journal_page_last               514
_journal_paper_doi               10.1039/c2ob26805a
_journal_volume                  11
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_compound_source        synthesis
_chemical_formula_moiety         'C11 H15 N1 O2'
_chemical_formula_sum            'C11 H15 N O2'
_chemical_formula_weight         193.24
_chemical_name_common            'gamma Phe'
_chemical_name_systematic        gamma_Phe
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 92.808(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.757(5)
_cell_length_b                   6.483(4)
_cell_length_c                   9.907(7)
_cell_measurement_temperature    100(2)
_cell_volume                     497.6(6)
_computing_cell_refinement       SAINT
_computing_data_collection       'APEX2 Ver.2010.11-3'
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_pressure         101.325
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_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  0.0978
_diffrn_reflns_av_sigmaI/netI    0.1077
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            8120
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.06
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.983
_exptl_absorpt_correction_T_min  0.959
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.290
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             208
_exptl_crystal_recrystallization_method MeOH/Water
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.424
_refine_diff_density_min         -0.314
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -2(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.947
_refine_ls_hydrogen_treatment    costr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         2169
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.947
_refine_ls_R_factor_all          0.1153
_refine_ls_R_factor_gt           0.0704
_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^)+(0.1124P)^2^+0.0406P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1626
_refine_ls_wR_factor_ref         0.1890
_reflns_number_gt                1451
_reflns_number_total             2169
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26805a.txt
_cod_data_source_block           gamma_Phe
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P21
_cod_original_formula_sum        'C11 H15 N1 O2'
_cod_database_code               7152774