Orthanilic acid-promoted reverse turn formation in peptides
Sangram S. Kale; Gowri Priya; Amol S. Kotmale; Rupesh L. Gawade; Vedavati G. Puranik; P. R. Rajamohanan; Gangadhar J. Sanjayan; Chemical communications (Cambridge, England) 49 (2013) 2222–2224; doi:10.1039/c3cc40522b

data_7108934
_publ_section_title
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 Orthanilic acid-promoted reverse turn formation in peptides
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_journal_issue                   22
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2222
_journal_page_last               2224
_journal_paper_doi               10.1039/c3cc40522b
_journal_volume                  49
_journal_year                    2013
_chemical_formula_moiety         'C20 H31 N3 O5 S'
_chemical_formula_sum            'C20 H31 N3 O5 S'
_chemical_formula_weight         425.54
_chemical_melting_point          377.6(5)
_chemical_name_common            Peptide
_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                 94.129(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.1664(7)
_cell_length_b                   10.5548(7)
_cell_length_c                   10.8876(7)
_cell_measurement_reflns_used    9939
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.11
_cell_measurement_theta_min      2.65
_cell_volume                     1165.25(13)
_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      296(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  0.0212
_diffrn_reflns_av_sigmaI/netI    0.0167
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            17083
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.88
_exptl_absorpt_coefficient_mu    0.172
_exptl_absorpt_correction_T_max  0.9508
_exptl_absorpt_correction_T_min  0.9266
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.213
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangular
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.443
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.03(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     267
_refine_ls_number_reflns         4098
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0392
_refine_ls_R_factor_gt           0.0366
_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^)+(0.0770P)^2^+0.0866P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1028
_refine_ls_wR_factor_ref         0.1066
_reflns_number_gt                3857
_reflns_number_total             4098
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc40522b.txt
_cod_data_source_block           C20H31N3O5Scompound5
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value '104-105degree centigrade' was
changed to '377.6(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 
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_cod_original_sg_symbol_H-M      P21
_cod_database_code               7108934