Ultraviolet-B light (UV-B) regulates the expression of genes in a wavelength- and fluence rate-dependent fashion. A signaling pathway consisting of CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1) and UV RESISTANCE LOCUS 8 (UVR 8) mediates responsiveness to longer wavelength, low intensity UV-B light-activating, for example, HY5 gene expression. By contrast, transcription of another group of genes, including ANAC13, modulated by shorter wavelength, higher intensity UV-B is controlled by a yet unknown and largely COP1-independent signaling cascade. Here we provide evidence by promoter deletion analysis, and characterization of genetic mutants displaying aberrant expression patterns, that two cis-regulatory elements, designated MRE(ANAC13) and UVBox(ANAC13), are required for maximal UV-B induction of the ANAC13 gene in transgenic plants. These elements are located in the proximal 150-bp region of the ANAC13 promoter. They show no significant similarity to each other; the putative MRE(ANAC13) (-AACCTT-) is closely related to MRE(CHS) (-AACCTA-) found in the CHALCONE SYNTHASE (CHS) gene, whereas UVBox(ANAC13) (with core sequence CAAG) represents a novel cis-regulatory element. The novel UVBox(ANAC13) sequence is significantly enriched in the promoter region of a subset of UV-B-induced genes with similar activation properties as ANAC13. In addition, we demonstrate that expression of a chimeric gene containing only the dimerized 12-mer containing UVBox(ANAC13) fused to a minimal CaMV35S promoter/luciferase reporter is (i) efficiently induced by shorter wavelength, higher intensity UV-B, but (ii) does not respond either to longer wavelength UV-B and red light or (iii) to abscisic acid treatment and osmotic, salt, heat and cold stresses.

Identification of a novel cis-regulatory element for UV-B-induced transcription in Arabidopsis / Judit, Safrany; Veronika, Haasz; Zoltan, Mate; Ciolfi, Andrea; Balazs, Feher; Attila, Oravecz; Agnieszka, Stec; Geza, Dallmann; Giorgio, Morelli; Roman, Ulm; Ferenc, Nagy. - In: PLANT JOURNAL. - ISSN 1365-313X. - 54:3(2008), pp. 402-414. [10.1111/j.1365-313x.2008.03435.x]

Identification of a novel cis-regulatory element for UV-B-induced transcription in Arabidopsis.

CIOLFI, ANDREA;
2008

Abstract

Ultraviolet-B light (UV-B) regulates the expression of genes in a wavelength- and fluence rate-dependent fashion. A signaling pathway consisting of CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1) and UV RESISTANCE LOCUS 8 (UVR 8) mediates responsiveness to longer wavelength, low intensity UV-B light-activating, for example, HY5 gene expression. By contrast, transcription of another group of genes, including ANAC13, modulated by shorter wavelength, higher intensity UV-B is controlled by a yet unknown and largely COP1-independent signaling cascade. Here we provide evidence by promoter deletion analysis, and characterization of genetic mutants displaying aberrant expression patterns, that two cis-regulatory elements, designated MRE(ANAC13) and UVBox(ANAC13), are required for maximal UV-B induction of the ANAC13 gene in transgenic plants. These elements are located in the proximal 150-bp region of the ANAC13 promoter. They show no significant similarity to each other; the putative MRE(ANAC13) (-AACCTT-) is closely related to MRE(CHS) (-AACCTA-) found in the CHALCONE SYNTHASE (CHS) gene, whereas UVBox(ANAC13) (with core sequence CAAG) represents a novel cis-regulatory element. The novel UVBox(ANAC13) sequence is significantly enriched in the promoter region of a subset of UV-B-induced genes with similar activation properties as ANAC13. In addition, we demonstrate that expression of a chimeric gene containing only the dimerized 12-mer containing UVBox(ANAC13) fused to a minimal CaMV35S promoter/luciferase reporter is (i) efficiently induced by shorter wavelength, higher intensity UV-B, but (ii) does not respond either to longer wavelength UV-B and red light or (iii) to abscisic acid treatment and osmotic, salt, heat and cold stresses.
2008
arabidopsis; arabidopsis proteins; base sequence; genetic; genetics; genetics/metabolism; light; molecular sequence data; point mutation; promoter regions; radiation effects; regulatory elements; transcription; transcriptional; ultraviolet rays
01 Pubblicazione su rivista::01a Articolo in rivista
Identification of a novel cis-regulatory element for UV-B-induced transcription in Arabidopsis / Judit, Safrany; Veronika, Haasz; Zoltan, Mate; Ciolfi, Andrea; Balazs, Feher; Attila, Oravecz; Agnieszka, Stec; Geza, Dallmann; Giorgio, Morelli; Roman, Ulm; Ferenc, Nagy. - In: PLANT JOURNAL. - ISSN 1365-313X. - 54:3(2008), pp. 402-414. [10.1111/j.1365-313x.2008.03435.x]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/509394
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