Immunoprecipitation using Anti HSP90 Ab

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Guy Sovak
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Immunoprecipitation using Anti HSP90 Ab

Hsp90 Immunoprecipitation,
(could be used also to CO-IP)

Protocol was modified by Guy Sovak from the original protocol that was described in:
Burnt, SA. Et al. (1998) Cell Stress & Chaperones 3: 44-56

1. Anti Hsp90, porduct #SPA-845 (Stressgen)
2. Anti mouse IgM Agarose Conjugated Ab. (Sigma #A-4540)
3. HEGD buffer (10mM HEPES, 1mM EDTA, 10% Glycerol, 5mM dithiothreitol, pH7.4).
4. HEGDMo-BSA buffer (HEGD buffer containing 20mM sodium molybdate and 2.5% BSA)

1. Prepare secondary antibody goat anti mouse IgM agarose by rotating for 1Hr at 4°C in the presence of Hsp90 Ab. Ratio Ab of to beads 3:2 (v/v).
2. Wash IgN agarose with the bound Ab twice with ice cold HEGD buffer, and once with HEGDMo-BSA buffer.
3. Centrifuge at 8000rpm for 5 minutes.
4. Resuspend the Ab-coated agarose in 0.5ml HEGDMo-BSA, (can be left in 4°C until use)
5. Mix lysate (sample) with the the Ab-coated agarose, and incubate while rotating at 4°C for 2Hr
6. Collect the complex by Centrifuge at 8000rpm for 5 minutes.
7. Wash the pellet once with HEGDMo without BSA containg 50mM NaCl, and twice with HEGDMo no BSA no NaCl.
8. Elute immunoabsorbed complexes by incubating in 2XLSB (add 10% b-ME if desired) for 20 min at 37°C.
9. Analyse by SDS.

NeuralUbqiquitin's picture
 Thanks a lot for this

 Thanks a lot for this protocol. Is there any antibody available, that you know, that can distinguish between Hsp90 A and B? 

Guy Sovak
Guy Sovak's picture
Yes there are couple,

Yes there are couple,
look at stressgen ab's I used to work with them and they are good.;jsessionid=0DE800EAC2767B7F91110D97EB77977A