2BGN

HIV-1 Tat protein derived N-terminal nonapeptide Trp2-Tat(1-9) bound to the active site of Dipeptidyl peptidase IV (CD26)

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1W1I	PDB ENTRY 1W1I

Crystallization

Crystal Properties
Matthews coefficient	Solvent content
3.14	60.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 158.945	α = 90
b = 170.273	β = 100.93
c = 239.2	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC CCD		2004-02-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-2		ESRF	ID14-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	3.15	30	89	0.11	9.7	2.5		97782		2.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.15	3.26	81		0.41	2.6	2.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1W1I	3.15	30	94691	1925	89.6	0.227	0.227	0.247	RANDOM	64.8

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
5.38		1.4	-1.9		-2.95

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.566
r_dihedral_angle_3_deg	20.616
r_dihedral_angle_4_deg	18.105
r_dihedral_angle_1_deg	6.176
r_scangle_it	1.898
r_angle_refined_deg	1.518
r_scbond_it	1.102
r_mcangle_it	1.013
r_angle_other_deg	0.948
r_mcbond_it	0.556
r_symmetry_hbond_refined	0.403
r_mcbond_other	0.327
r_symmetry_vdw_refined	0.302
r_symmetry_vdw_other	0.251
r_nbd_refined	0.216
r_nbd_other	0.209
r_xyhbond_nbd_refined	0.181
r_xyhbond_nbd_other	0.178
r_chiral_restr	0.105
r_nbtor_other	0.096
r_bond_refined_d	0.008
r_gen_planes_refined	0.003
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_nbtor_refined
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	35292
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	804

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling