Residue dependent hydrogen bonding preferences in orthanilic acid-based short peptide β-turn motifs
Jedhe, Ganesh S.; Vijayadas, Kuruppanthara N.; Kotmale, Amol; Sangtani, Ekta; Shinde, Dinesh R.; Gonnade, Rajesh G.; Rajamohanan, Pattuparambil R.; Sanjayan, G. J.; RSC Adv.  (2016) –; doi:10.1039/C6RA05684A

data_7224716
_publ_section_title
;
 Residue dependent hydrogen bonding preferences in orthanilic acid-based
 short peptide \b-turn motifs
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA05684A
_journal_year                    2016
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C26 H42 N4 O5 S'
_chemical_formula_sum            'C26 H42 N4 O5 S'
_chemical_formula_weight         522.69
_chemical_name_systematic        Piv-L-tert-Leu-L-Pro-SAnt-NH-IBu
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2015-12-16 deposited with the CCDC.
2016-03-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.0729(4)
_cell_length_b                   11.2306(4)
_cell_length_c                   23.8209(9)
_cell_measurement_reflns_used    9887
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      26.84
_cell_measurement_theta_min      2.49
_cell_volume                     2962.26(19)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(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_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0262
_diffrn_reflns_av_unetI/netI     0.0263
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            27955
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.000
_diffrn_reflns_theta_min         2.005
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.148
_exptl_absorpt_correction_T_max  0.964
_exptl_absorpt_correction_T_min  0.931
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'sadabs(bruker, 2006)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.172
_exptl_crystal_description       'Thick Plate'
_exptl_crystal_F_000             1128
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Erthylacetate-petether'
_exptl_crystal_size_max          0.487
_exptl_crystal_size_mid          0.363
_exptl_crystal_size_min          0.249
_refine_diff_density_max         0.400
_refine_diff_density_min         -0.252
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
;
 Flack x determined using 2078 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.044(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     365
_refine_ls_number_reflns         6478
_refine_ls_number_restraints     34
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0488
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0575P)^2^+0.7101P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1140
_refine_ls_wR_factor_ref         0.1199
_reflns_Friedel_coverage         0.777
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                5621
_reflns_number_total             6478
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra05684a2.cif
_cod_data_source_block           7
_cod_database_code               7224716
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.931
_shelx_estimated_absorpt_t_max   0.964
_shelx_res_checksum              73308