Source:http://linkedlifedata.com/resource/pubmed/id/21215281
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
5
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pubmed:dateCreated |
2011-4-18
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pubmed:abstractText |
The ubiquitous sarco(endo)plasmic reticulum (SR/ER) Ca(2+) ATPase (SERCA2b) and secretory-pathway Ca(2+) ATPase (SPCA1a) belong both to the P(2A)-type ATPase subgroup of Ca(2+) transporters and play a crucial role in the Ca(2+) homeostasis of respectively the ER and Golgi apparatus. They are ubiquitously expressed, but their low abundance precludes purification for crystallization. We have developed a new strategy for purification of recombinant hSERCA2b and hSPCA1a that is based on overexpression in yeast followed by a two-step affinity chromatography method biasing towards properly folded protein. In a first step, these proteins were purified with the aid of an analogue of the SERCA inhibitor thapsigargin (Tg) coupled to a matrix. Wild-type (WT) hSERCA2b bound efficiently to the gel, but its elution was hampered by the high affinity of SERCA2b for Tg. Therefore, a mutant was generated carrying minor modifications in the Tg-binding site showing a lower affinity for Tg. In a second step, reactive dye chromatography was performed to further purify and concentrate the properly folded pumps and to exchange the detergent to one more suitable for crystallization. A similar strategy was successfully applied to purify WT SPCA1a. This study shows that it is possible to purify functionally active intracellular Ca(2+) ATPases using successive thapsigargin and reactive dye affinity chromatography for future structural studies. This article is part of a Special Issue entitled: 11th European Symposium on Calcium.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/ATP2A2 protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/ATP2C1 protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium-Transporting ATPases,
http://linkedlifedata.com/resource/pubmed/chemical/Mutant Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Recombinant Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Sarcoplasmic Reticulum...,
http://linkedlifedata.com/resource/pubmed/chemical/Thapsigargin
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pubmed:status |
MEDLINE
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pubmed:month |
May
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pubmed:issn |
0006-3002
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pubmed:author |
pubmed-author:ChristensenSøren BrøggerSB,
pubmed-author:EggermontJanJ,
pubmed-author:LiuHuizhenH,
pubmed-author:MøllerJesper VJV,
pubmed-author:NissenPoulP,
pubmed-author:RaeymaekersLucL,
pubmed-author:Van VeldhovenPaul PPP,
pubmed-author:VandecaetsbeekIlseI,
pubmed-author:VangheluwePeterP,
pubmed-author:WaelkensEtienneE,
pubmed-author:WuytackFrankF
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pubmed:copyrightInfo |
2011 Elsevier B.V. All rights reserved.
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pubmed:issnType |
Print
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pubmed:volume |
1813
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1118-27
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pubmed:meshHeading |
pubmed-meshheading:21215281-Binding Sites,
pubmed-meshheading:21215281-Calcium-Transporting ATPases,
pubmed-meshheading:21215281-Chromatography, Affinity,
pubmed-meshheading:21215281-Humans,
pubmed-meshheading:21215281-Intracellular Space,
pubmed-meshheading:21215281-Mutant Proteins,
pubmed-meshheading:21215281-Protein Structure, Secondary,
pubmed-meshheading:21215281-Recombinant Proteins,
pubmed-meshheading:21215281-Sarcoplasmic Reticulum Calcium-Transporting ATPases,
pubmed-meshheading:21215281-Thapsigargin
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pubmed:year |
2011
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pubmed:articleTitle |
Thapsigargin affinity purification of intracellular P(2A)-type Ca(2+) ATPases.
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pubmed:affiliation |
Laboratory of Cellular Transport Systems; Department of Molecular Cell Biology, Campus Gasthuisberg O.&N.1, K.U. Leuven, Herestraat 49, bus 802, B-3000 Leuven, Belgium. llse.Vandecaetsbeek@med.kuleuven.be
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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