Table 1

Crystallographic statistics

α0-1/β16-17
Data collection  
    Detector type/source MarCCD (Rayonix)/Advanced Photo Source 
    Wavelength, Å 0.97872 
    Resolution,* Å 40.0-2.80 (2.92-2.80) 
    Measured reflections 54 695 (6817) 
    Unique reflections 18 015 (2195) 
    Completeness 98.6 (99.3) 
    Multiplicity 3.0 (3.1) 
    Mean [I/σ(I)] 13.5 (3.4) 
    Rsym, % 5.7 (29.7) 
    Rmeas,% 7.0 (35.8) 
Refinement  
    Resolution 35.0-2.80 (2.87-2.80) 
    Number of reflections working/test 17 085/922 (1251/76) 
    R-work, %§ 26.8 (40.9) 
    R-free, % 29.9 (40.5) 
    Protein atoms 2673 
    Bond lengths 0.011 
    Bond angles 1.24 
α0-1/β16-17
Data collection  
    Detector type/source MarCCD (Rayonix)/Advanced Photo Source 
    Wavelength, Å 0.97872 
    Resolution,* Å 40.0-2.80 (2.92-2.80) 
    Measured reflections 54 695 (6817) 
    Unique reflections 18 015 (2195) 
    Completeness 98.6 (99.3) 
    Multiplicity 3.0 (3.1) 
    Mean [I/σ(I)] 13.5 (3.4) 
    Rsym, % 5.7 (29.7) 
    Rmeas,% 7.0 (35.8) 
Refinement  
    Resolution 35.0-2.80 (2.87-2.80) 
    Number of reflections working/test 17 085/922 (1251/76) 
    R-work, %§ 26.8 (40.9) 
    R-free, % 29.9 (40.5) 
    Protein atoms 2673 
    Bond lengths 0.011 
    Bond angles 1.24 
*

Numbers in parentheses correspond to the highest-resolution shell throughout.

Rsym = Σ I−<I> /ΣI, where I is the observed intensity and <I> the average intensity obtained from multiple measurements.

Rmeas as described in Diederichs and Karplus.29 

§

R-work=Σ FoFcFo, where Fo is the observed structure factor amplitude and Fc the calculated structure factor amplitude.

Rfree: R-factor determined on the basis of 5% of the data excluded from refinement.

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