Structural characterization of folded and extended conformations in peptides containing γ amino acids with proteinogenic side chains: crystal structures of γn, (αγ)nand γγδγ sequences
M. B. Reddy, Madhusudana; Basuroy, K.; Chandrappa, S.; Dinesh, B.; Vasantha, B.; A. Venkatesha, Manjunath; Balaram, P.; New J. Chem. 39 (2015) 3319–; doi:10.1039/C5NJ00132C

data_7054694
_publ_section_title
;
 Structural characterization of folded and extended conformations in
 peptides containing \g amino acids with proteinogenic side chains:
 crystal structures of \gn, (\a\g)nand \g\g\d\g sequences
;
_journal_issue                   5
_journal_name_full               'New J. Chem.'
_journal_page_first              3319
_journal_paper_doi               10.1039/C5NJ00132C
_journal_volume                  39
_journal_year                    2015
_chemical_formula_moiety         'C20 H38 N2 O5'
_chemical_formula_sum            'C20 H38 N2 O5'
_chemical_formula_weight         386.52
_chemical_name_common            Boc-Gamma-S-Val-Gamma-R-Val-OMe
_chemical_name_systematic
; 
 t-Butyloxycarbonyl-gamma-S-Valyl-gamma-R-Valyl-methyl ester      
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-12-10 deposited with the CCDC.
2015-02-18 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 120.3230(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   28.9383(8)
_cell_length_b                   5.14190(10)
_cell_length_c                   18.4128(5)
_cell_measurement_temperature    296(2)
_cell_volume                     2364.96(11)
_computing_data_collection
'BRUKER AXS SMART APEXII ULTRA CCD with Cu source'
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXD (Schneider and Sheldrick, 2002)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type
'BRUKER AXS SMART APEXII ULTRA CCD with Cu source'
_diffrn_measurement_method       'omega and phi scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0030
_diffrn_reflns_av_sigmaI/netI    0.0065
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6864
_diffrn_reflns_theta_full        70.11
_diffrn_reflns_theta_max         70.11
_diffrn_reflns_theta_min         2.78
_exptl_absorpt_coefficient_mu    0.624
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.086
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular block'
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.230
_refine_diff_density_min         -0.295
_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   -10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.143
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     300
_refine_ls_number_reflns         2405
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      1.142
_refine_ls_R_factor_all          0.0522
_refine_ls_R_factor_gt           0.0499
_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^)+(0.1284P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1485
_refine_ls_wR_factor_ref         0.1496
_reflns_number_gt                2116
_reflns_number_total             2405
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5nj00132c2.cif
_cod_data_source_block           SGVRGV
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

 Adding full bibliography for 7054687--7054695.cif.
;
_cod_original_cell_volume        2364.96(10)
_cod_original_sg_symbol_H-M      C2
_cod_database_code               7054694