scholarly journals Purification and characterization of pheromaxein, the porcine steroid-binding protein

2004 ◽  
Vol 271 (13) ◽  
pp. 2593-2606 ◽  
Author(s):  
Corrine J. Austin ◽  
Louise Emberson ◽  
Peter Nicholls
1982 ◽  
Vol 60 (8) ◽  
pp. 798-803 ◽  
Author(s):  
Mike Francis ◽  
Mamoru Watanabe

A steroid-binding protein obtained from the supernatant of the final wash from the preparation of membrane vesicles was purified severalfold to near homogeneity. The protein binds C18 and C19 steroids but has the highest affinity for androstenedione (Kd = 1.6 × 10−10 M). The molecular weight is 51 000 – 58 000. Binding activity is slightly inhibited by Cu2+, Ca2+, and Mg2+ and completely inhibited by Zn2+. The protein has no detectable steroid degradative activity. Analysis of androstenedione binding revealed negative cooperativity of binding for this ligand and may indicate a regulatory function for this protein. It is postulated that this protein binds the steroid after testosterone is converted to androstenedione.


Biochemistry ◽  
1984 ◽  
Vol 23 (3) ◽  
pp. 492-497 ◽  
Author(s):  
Eric E. Turner ◽  
J. B. Alexander Ross ◽  
Pearl C. Namkung ◽  
Philip H. Petra

FEBS Letters ◽  
1992 ◽  
Vol 299 (1) ◽  
pp. 23-27 ◽  
Author(s):  
Frederick S. Hagen ◽  
Cesar Arguelles ◽  
Li-ming Sui ◽  
Wei Zhang ◽  
Paul R. Seidel ◽  
...  

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