Experiment: 1ML3

Evidences for a flip-flop catalytic mechanism of Trypanosoma cruzi glyceraldehyde-3-phosphate dehydrogenase, from its crystal structure in complex with reacted irreversible inhibitor 2-(2-phosphono-ethyl)-acrylic acid 4-nitro-phenyl ester

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		NATIVE STRUCTURE OF T.cruzi gGAPDH (Souza et al FEBES letters (1998), 424, 131-135)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	291	PEG 8000, CALCIUM ACETATE, EDTA, SODIUM AZIDE, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.32	47.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.456	α = 90
b = 85.259	β = 95.61
c = 105.153	γ = 90

Symmetry
Space Group	P 1 21 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	IMAGE PLATE	MARRESEARCH		2000-10-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LNLS BEAMLINE D03B-MX1	1.5418	LNLS	D03B-MX1

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	2.5	20	97.5	0.113	9.73	2.77		48450

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)
	2.5	2.56	99		0.438	2.57	2.47

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	NATIVE STRUCTURE OF T.cruzi gGAPDH (Souza et al FEBES letters (1998), 424, 131-135)	2.5	20	49486	48450	2455	97.5	0.1986	0.1989	0.2645	0.2648

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]

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_d	1.22317
c_bond_d	0.006174

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10984
Nucleic Acid Atoms
Solvent Atoms	695
Heterogen Atoms	182

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement