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Title

Identification and subcellular localization of the soybean copper P1B-ATPase GmHMA8 transporter

AuthorsBernal Ibáñez, María ; Testillano, P.S. ; Alfonso Lozano, Miguel ; Risueño, María Carmen ; Picorel Castaño, Rafael ; Yruela Guerrero, Inmaculada
KeywordsATPase copper transporter
Cell suspensions
Chloroplast
Immunofluorescence labelling
Immunogold labelling
Soybean
Thylakoid membrane
Issue DateApr-2007
PublisherElsevier
CitationJournal of Structural Biology 158(2007)46-58
AbstractWe have identified a copper P1B-ATPase transporter in soybean (Glycine max), named as GmHMA8, homologue to cyanobacterial PacS and Arabidopsis thaliana AtHMA8 (PAA2) transporters. A novel specific polyclonal anti-GmHMA8 antibody raised against a synthetic peptide reacted with a protein of an apparent mass of around 180–200 kDa in chloroplast and thylakoid membrane preparations isolated from soybean cell suspensions. Immunoblot analysis with this antibody also showed a band with similar apparent molecular mass in chloroplasts from Lotus corniculatus. Immunofluorescence labelling with the anti-GmHMA8 antibody and double immunofluorescence labelling with anti-GmHMA8 and anti-RuBisCo antibodies revealed the localization of the GmHMA8 transporter within the chloroplast organelle. Furthermore, the precise ultrastructural distribution of GmHMA8 within the chloroplast subcompartments was demonstrated by using electron microscopy immunogold labelling. The GmHMA8 copper transporter from soybean was localized in the thylakoid membranes showing a heterogeneous distribution in small clusters.
DescriptionThe definitive version is available at: www.sciencedirect.com/science/journal/10478477
URIhttp://hdl.handle.net/10261/2914
DOI10.1016/j.jsb.2006.10.016
ISBN1047-8477
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(EEAD) Artículos
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