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Title: Characterization of two genes encoding metal tolerance proteins from Beta vulgaris subspecies maritima that confers manganese tolerance in yeast
Authors: Erbaşol, Işıl
Bozdağ, Gönensin Ozan
Koç, Ahmet
Pedas, Pia
Karakaya, Hüseyin Çağlar
Keywords: Golgi
Heavy metal tolerance
Metal tolerance protein
Issue Date: 2013
Publisher: Springer Verlag
Source: Erbaşol, I., Bozdağ, G.O., Koç, A., Pedas, P., and Karakaya, H.Ç. (2013). Characterization of two genes encoding metal tolerance proteins from Beta vulgaris subspecies maritima that confers manganese tolerance in yeast. BioMetals, 26(5), 795-804. doi:10.1007/s10534-013-9658-7
Abstract: Manganese (Mn2+) is an essential micronutrient in plants. However increased Mn2+ levels are toxic to plant cells. Metal tolerance proteins (MTPs), member of cation diffusion facilitator protein (CDF) family, have important roles in metal homeostatis in different plant species and catalyse efflux of excess metal ions. In this study, we identified and characterized two MTP genes from Beta vulgaris spp. maritima (B. v. ssp. maritima). Overexpression of these two genes provided Mn tolerance in yeast cells. Sequence analyses displayed BmMTP10 and BmMTP11as members of the Mn-CDF family. Functional analyses of these proteins indicated that they are specific to Mn2+ with a role in reducing excess cellular Mn2+ levels when expressed in yeast. GFP-fusion constructs of both proteins localized to the Golgi apparatus as a punctuated pattern. Finally, Q-RT-PCR results showed that BmMTP10 expression was induced threefold in response to the excess Mn2+ treatment. On the other hand BmMTP11 expression was not affected in response to excess Mn2+ levels. Thus, our results suggest that the BmMTP10 and BmMTP11 proteins from B. v. ssp. maritima have non-redundant functions in terms of Mn2+ detoxification with a similar in planta localization and function as the Arabidopsis Mn-CDF homolog AtMTP11 and this conservation shows the evolutionary importance of these vesicular proteins in heavy metal homeostatis among plant species.
ISSN: 0966-0844
Appears in Collections:Molecular Biology and Genetics / Moleküler Biyoloji ve Genetik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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