β-Hydroxy-Stabilized Boron-Nitrogen Heterocycles Enable Rapid and Efficient C-Terminal Protein Modification.
Gu, Han; Ghosh, Saptarshi; Staples, Richard J.; Bane, Susan L.; Bioconjugate chemistry 30 (2019) 2604–2613; doi:10.1021/acs.bioconjchem.9b00534

data_1552497
_publ_section_title
;
 \b-Hydroxy-Stabilized Boron-Nitrogen Heterocycles Enable Rapid and
 Efficient C-Terminal Protein Modification.
;
_journal_issue                   10
_journal_name_full               'Bioconjugate chemistry'
_journal_page_first              2604
_journal_page_last               2613
_journal_paper_doi               10.1021/acs.bioconjchem.9b00534
_journal_volume                  30
_journal_year                    2019
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C16 H16 B N3 O3'
_chemical_formula_sum            'C16 H16 B N3 O3'
_chemical_formula_weight         309.13
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2018-11-05
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 91.886(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.95450(10)
_cell_length_b                   4.96270(10)
_cell_length_c                   25.4669(7)
_cell_measurement_reflns_used    3090
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      69.93
_cell_measurement_theta_min      5.21
_cell_volume                     752.15(3)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection       'COSMO (BRUKER, V1.61, 2009)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.36
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0558
_diffrn_reflns_av_unetI/netI     0.0518
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.983
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            7362
_diffrn_reflns_point_group_measured_fraction_full 0.964
_diffrn_reflns_point_group_measured_fraction_max 0.954
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.003
_diffrn_reflns_theta_min         5.213
_diffrn_source                   'sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.777
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.6101
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_description       plate
_exptl_crystal_F_000             324
_exptl_crystal_recrystallization_method 'used as received'
_exptl_crystal_size_max          0.224
_exptl_crystal_size_mid          0.119
_exptl_crystal_size_min          0.022
_refine_diff_density_max         0.188
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.2(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         2719
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0569
_refine_ls_R_factor_gt           0.0433
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0542P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0952
_refine_ls_wR_factor_ref         0.1021
_reflns_Friedel_coverage         0.725
_reflns_Friedel_fraction_full    0.931
_reflns_Friedel_fraction_max     0.917
_reflns_number_gt                2265
_reflns_number_total             2719
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            bc9b00534_si_002.cif
_cod_data_source_block           jh1018b
_cod_database_code               1552497
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.983
_shelx_estimated_absorpt_t_min   0.845
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.8
 0.2
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
3.a Ternary CH refined with riding coordinates:
 C9(H9)
3.b Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B)
3.c Aromatic/amide H refined with riding coordinates:
 C1(H1A), C4(H4), C5(H5), C6(H6), C7(H7), C12(H12), C13(H13), C15(H15), C16(H16)
;
_shelx_res_checksum              64380
_shelx_hkl_checksum              15627
_olex2_diffrn_ambient_temperature_device 'Oxford Cryosystems'
_olex2_exptl_crystal_mounting_method
'The crystal was mounted on a nylon loop with paratone oil'
_olex2_submission_original_sample_id '2  Tyrosine hydrazide DAB'
_olex2_submission_special_instructions 'No special instructions were received'