- PDB-3f7c: Crystal structure of a duf416 family protein (maqu_0942) from mar... -
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Basic information
Entry
Database: PDB / ID: 3f7c
Title
Crystal structure of a duf416 family protein (maqu_0942) from marinobacter aquaeolei vt8 at 2.00 A resolution
Components
protein of unknown function (DUF416)
Keywords
UNKNOWN FUNCTION / Structural genomics / Joint Center for Structural Genomics / JCSG / Protein Structure Initiative / PSI-2
Function / homology
YP_001051499.1 fold like / YP_001051499.1 domain like / Protein of unknown function DUF416 / YP001051499.1-like domain superfamily / Protein of unknown function (DUF416) / Up-down Bundle / Mainly Alpha / CITRIC ACID / DUF416 family protein
Function and homology information
Biological species
Marinobacter aquaeolei VT8 (bacteria)
Method
X-RAY DIFFRACTION / SYNCHROTRON / MAD / Resolution: 2 Å
Mass: 18.015 Da / Num. of mol.: 121 / Source method: isolated from a natural source / Formula: H2O
Has protein modification
Y
Sequence details
SEQUENCE THE CONSTRUCT WAS EXPRESSED WITH A PURIFICATION TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS ...SEQUENCE THE CONSTRUCT WAS EXPRESSED WITH A PURIFICATION TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS REMOVED WITH TEV PROTEASE LEAVING ONLY A GLYCINE (0) FOLLOWED BY THE TARGET SEQUENCE. THE CONSTRUCT WAS ENGINEERED WITH THREE MUTATIONS K168Y, K169Y AND Q170Y. THE SITES OF MUTATIONS WERE SELECTED FROM HIGH ENTROPY SITES PREDICTED BY THE UCLA SURFACE ENTROPY REDUCTION SERVER.
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Experimental details
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Experiment
Experiment
Method: X-RAY DIFFRACTION / Number of used crystals: 1
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Sample preparation
Crystal
Density Matthews: 3.43 Å3/Da / Density % sol: 64.12 %
Crystal grow
Temperature: 277 K / Method: vapor diffusion, sitting drop / pH: 9.5 Details: 1.0M sodium citrate, 0.1M CHES pH 9.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K
Resolution: 2→29.424 Å / Num. obs: 20811 / % possible obs: 100 % / Redundancy: 7.4 % / Biso Wilson estimate: 37.979 Å2 / Rmerge(I) obs: 0.089 / Rsym value: 0.089 / Net I/σ(I): 4.107
Reflection shell
Diffraction-ID: 1
Resolution (Å)
Redundancy (%)
Rmerge(I) obs
Mean I/σ(I) obs
Num. measured all
Num. unique all
Rsym value
% possible all
2-2.05
5.7
0.835
0.9
8658
1510
0.835
99.8
2.05-2.11
5.6
0.697
0.6
8489
1511
0.697
100
2.11-2.17
5.7
0.484
1.5
8364
1457
0.484
100
2.17-2.24
5.8
0.382
1.9
8124
1410
0.382
100
2.24-2.31
5.7
0.382
0.8
7651
1354
0.382
100
2.31-2.39
5.8
0.24
2.9
7695
1334
0.24
100
2.39-2.48
5.7
0.183
3.9
7390
1287
0.183
100
2.48-2.58
5.8
0.158
4.4
7067
1225
0.158
100
2.58-2.7
5.7
0.141
4.2
6756
1177
0.141
100
2.7-2.83
5.8
0.111
6.1
6576
1141
0.111
100
2.83-2.98
8
0.114
6
8619
1076
0.114
100
2.98-3.16
9
0.112
5.6
9024
1006
0.112
100
3.16-3.38
10.6
0.092
6.5
10203
963
0.092
100
3.38-3.65
11.3
0.084
6.4
10101
896
0.084
100
3.65-4
11.3
0.075
8.1
9209
813
0.075
100
4-4.47
11.4
0.072
8.3
8517
747
0.072
100
4.47-5.16
11.3
0.069
8.5
7543
668
0.069
100
5.16-6.32
11.3
0.075
8.3
6267
554
0.075
100
6.32-8.94
11
0.073
5.7
4830
439
0.073
100
8.94-29.43
10.2
0.085
5.3
2471
243
0.085
97.3
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Phasing
Phasing
Method: MAD
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Processing
Software
Name
Version
Classification
NB
REFMAC
5.5.0053
refinement
PHENIX
refinement
SOLVE
phasing
MolProbity
3beta29
modelbuilding
SCALA
3.2.5
datascaling
PDB_EXTRACT
3.006
dataextraction
MOSFLM
datareduction
Refinement
Method to determine structure: MAD / Resolution: 2→29.424 Å / Cor.coef. Fo:Fc: 0.967 / Cor.coef. Fo:Fc free: 0.957 / Occupancy max: 1 / Occupancy min: 0.2 / SU B: 6.148 / SU ML: 0.077 / TLS residual ADP flag: LIKELY RESIDUAL / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.128 / ESU R Free: 0.118 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: 1. HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. 2. A MET-INHIBITION PROTOCOL WAS USED FOR SELENOMETHIONINE INCORPORATION DURING PROTEIN EXPRESSION. THE OCCUPANCY OF THE SE ATOMS IN THE ...Details: 1. HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. 2. A MET-INHIBITION PROTOCOL WAS USED FOR SELENOMETHIONINE INCORPORATION DURING PROTEIN EXPRESSION. THE OCCUPANCY OF THE SE ATOMS IN THE MSE RESIDUES WAS REDUCED TO 0.75 FOR THE REDUCED SCATTERING POWER DUE TO PARTIAL S-MET INCORPORATION. 3. ATOM RECORDS CONTAIN RESIDUAL B FACTORS ONLY. 4. CITRATE AND SODIUM MODELED ARE PRESENT IN CRYSTALLIZATION CONDITION. 5. THERE ARE SOME UNMODELED NON-PROTEIN DENSITIES NEAR RESIDUE A19.
Rfactor
Num. reflection
% reflection
Selection details
Rfree
0.196
1067
5.1 %
RANDOM
Rwork
0.172
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obs
0.173
20774
99.92 %
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Solvent computation
Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
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