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_7108375
_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         'C12 H16 N2 O4 S'
_chemical_formula_sum            'C12 H16 N2 O4 S'
_chemical_formula_weight         284.33
_chemical_melting_point          391.6(5)
_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                   7.6518(4)
_cell_length_b                   11.1273(6)
_cell_length_c                   14.9119(9)
_cell_measurement_reflns_used    6211
_cell_measurement_temperature    90(2)
_cell_measurement_theta_min      2.28
_cell_volume                     1269.66(12)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL,PyMOL and PLATON'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0278
_diffrn_reflns_av_sigmaI/netI    0.0209
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            10339
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.268
_exptl_absorpt_correction_T_max  0.9681
_exptl_absorpt_correction_T_min  0.9303
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.487
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangular
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.295
_refine_diff_density_min         -0.199
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.05(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         2224
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0263
_refine_ls_R_factor_gt           0.0253
_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^)+(0.0396P)^2^+0.2604P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0664
_refine_ls_wR_factor_ref         0.0672
_reflns_number_gt                2166
_reflns_number_total             2224
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc34533a.txt
_cod_data_source_block           compound7
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value '118-119 degree centigrade' was
changed to '391.6(5)' - 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               7108375