Table III.

Summary of properties of WT and mutant She2p constructs

She2p Oligomeric state in solution Binds to She3p in vitro Processive Binds to mRNA in vitro Correct localization of ASH1 mRNA in yeast 
WT* Tetramer ++++ ++++a 
    Kd = 0.1 µMb  
S120Y Dimer − +a  
L130Y Dimer +++ − ++a 
    Kd = 1.0 µMb  
Δhelix Tetramer  − ND  
She2p Oligomeric state in solution Binds to She3p in vitro Processive Binds to mRNA in vitro Correct localization of ASH1 mRNA in yeast 
WT* Tetramer ++++ ++++a 
    Kd = 0.1 µMb  
S120Y Dimer − +a  
L130Y Dimer +++ − ++a 
    Kd = 1.0 µMb  
Δhelix Tetramer  − ND  
a

Relative ability of 1 µM She2p to bind to mRNA using filter-binding experiments (Niessing et al., 2004).

b

Values from mRNA filter-binding experiments using the ASH1 mRNA E3 zip code element (Müller et al., 2009).

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