Peptide turns through just ‘one atom’! A sulfamide group nucleates folding and stabilizes new supramolecular topologies in short peptides
Gopinath, Pushparathinam; Ramkumar, Venkatachalam; Muraleedharan, Kannoth Manheri; CrystEngComm 16 (2014) 10371–; doi:10.1039/C4CE01938E

data_7218258
_publ_section_title
;
 Peptide turns through just &#x2018;one atom&#x2019;! A sulfamide group
 nucleates folding and stabilizes new supramolecular topologies in short
 peptides
;
_journal_issue                   45
_journal_name_full               CrystEngComm
_journal_page_first              10371
_journal_paper_doi               10.1039/C4CE01938E
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C22 H42 N4 O8 S'
_chemical_formula_sum            'C22 H42 N4 O8 S'
_chemical_formula_weight         522.67
_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            8
_cell_length_a                   15.675(2)
_cell_length_b                   18.849(5)
_cell_length_c                   19.855(5)
_cell_measurement_temperature    298(2)
_cell_volume                     5866(2)
_computing_cell_refinement       APEXII,Bruker,2004
_computing_data_collection       APEXII,Bruker,2004
_computing_data_reduction        SAINT,Bruker,2004
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.951
_diffrn_measured_fraction_theta_max 0.951
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'Phi and 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  0.0577
_diffrn_reflns_av_sigmaI/netI    0.0644
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7962
_diffrn_reflns_theta_full        17.04
_diffrn_reflns_theta_max         17.04
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    0.157
_exptl_absorpt_correction_T_max  0.9922
_exptl_absorpt_correction_T_min  0.9619
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker,2004)'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.183
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2256
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.199
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     651
_refine_ls_number_reflns         3199
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0708
_refine_ls_R_factor_gt           0.0473
_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^)+(0.0642P)^2^+4.1588P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1106
_refine_ls_wR_factor_ref         0.1297
_reflns_number_gt                2461
_reflns_number_total             3199
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ce01938e2.cif
_cod_data_source_block           new
_cod_depositor_comments
'Adding full bibliography for 7218258--7218261.cif.'
_cod_original_cell_volume        5867(2)
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7218258