The Arabidopsis Putative Selenium-Binding Protein Family: Expression Study and Characterization of SBP1 as a Potential New Player in Cadmium Detoxification Processes1[W] (Record no. 43700)

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control field 20250625140613.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-9450
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Title The Arabidopsis Putative Selenium-Binding Protein Family: Expression Study and Characterization of SBP1 as a Potential New Player in Cadmium Detoxification Processes1[W]
490 0# - SERIES STATEMENT
Volume/sequential designation Plant Physiology, 147, p.239-251, 2008
520 3# - SUMMARY, ETC.
Summary, etc. In Arabidopsis (Arabidopsis thaliana), the putative selenium-binding protein (SBP)gene family is composed of three members (SBP1-SBP3). Reverse transcription-polymerase chain reaction analyses showed that SBP1 expression was ubiquitous. SBP2 was expressed at a lower level in flowers and roots, whereas SBP3 transcripts were only detected in young seedling tissues. In cadmium (Cd)-treated seedlings, SBP1 level of expression was rapidly increased in roots. In shoots, SBP1 transcripts accumulated later and for higher Cd doses. SBP2 and SBP3 expression showed delayed or no responsiveness to Cd. In addition, luciferase (LUC)activity recorded on Arabidopsis lines expressing the LUC gene under the control of the SBP1 promoter further showed dynamic regulation of SBP1 expression during development and in response to Cd stress. Westernblot analysis using polyclonal antibodies raised against SBP1 showed that SBP1 protein accumulated in Cd-exposed tissues in correlation with SBP1 transcript amount. The sbp1 null mutant displayed no visible phenotype under normal and stress conditions that was explained by the up-regulation of SBP2 expression. SBP1 overexpression enhanced Cd accumulation in roots and reduced sensitivity to Cd in wild type and, more significantly, in Cd-hypersensitive cad mutants that lack phytochelatins. Similarly, in Saccharomyces cerevisiae, SBP1 expression led to increased Cd tolerance of the Cd-hypersensitive ycf1 mutant. In vitro experiments showed that SBP1 has the ability to bind Cd. These data highlight the importance of maintaining the adequate SBP protein level under healthy and stress conditions and suggest that, during Cd stress, SBP1 accumulation efficiently helps to detoxify Cd potentially through direct binding
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Dutilleul, C.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Jourdain, A.
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Personal name Bourguignon, J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hugouvieux, V.
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/1LSJM0QnYbfpDbOMAx_t4E-Ry222ue0Kd/view?usp=drivesdk">https://drive.google.com/file/d/1LSJM0QnYbfpDbOMAx_t4E-Ry222ue0Kd/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-9450 25.06.2025 25.06.2025 Documentos solicitados