An unusual conformational similarity of two peptide folds featuring sulfonamide and carboxamide on the backbone
Kuruppanthara N. Vijayadas; Hilda C. Davis; Amol S. Kotmale; Rupesh L. Gawade; Vedavati G. Puranik; Pattuparambil R. Rajamohanan; Gangadhar J. Sanjayan; Chem.Commun. 48 (2012) 9747–; doi:10.1039/c2cc34533a

data_7108371
_publ_section_title
;
 An unusual conformational similarity of two peptide folds featuring
 sulfonamide and carboxamide on the backbone
;
_journal_name_full               Chem.Commun.
_journal_page_first              9747
_journal_paper_doi               10.1039/c2cc34533a
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C19 H20 Br N3 O4 S'
_chemical_formula_sum            'C19 H20 Br N3 O4 S'
_chemical_formula_weight         466.35
_chemical_melting_point          472.1(10)
_chemical_name_common            Peptide
_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                   9.3380(6)
_cell_length_b                   13.9088(9)
_cell_length_c                   15.438(1)
_cell_measurement_reflns_used    3746
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      25.888
_cell_measurement_theta_min      2.628
_cell_volume                     2005.1(2)
_computing_cell_refinement       'BRUKER SAINT'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    'SHELXTL, PyMOL and PLATON'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'Bruker Smart APEX'
_diffrn_measurement_device_type  'CCD Area Detector'
_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  0.0290
_diffrn_reflns_av_sigmaI/netI    0.0522
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10047
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.55
_exptl_absorpt_coefficient_mu    2.185
_exptl_absorpt_correction_T_max  0.9177
_exptl_absorpt_correction_T_min  0.6945
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.545
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.605
_refine_diff_density_min         -0.202
_refine_diff_density_rms         0.064
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.008(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         3513
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0427
_refine_ls_R_factor_gt           0.0352
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0372P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0810
_refine_ls_wR_factor_ref         0.0850
_reflns_number_gt                3029
_reflns_number_total             3513
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc34533a.txt
_cod_data_source_block           compound2
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value '198-200 degree centigrade' was
changed to '472.1(10)' - it was converted from degrees Celsius(C) to
Kelvins(K), the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7108371