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Characterization of a protein that a...

Marsh, Jennifer Wynne.

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Characterization of a protein that accumulates in Arabidopsis plants after UV-B-exposure.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Characterization of a protein that accumulates in Arabidopsis plants after UV-B-exposure./
作者:	Marsh, Jennifer Wynne.
面頁冊數:	38 p.
附註:	Chair: Rodrigo Lois.
Contained By:	Masters Abstracts International40-03.
標題:	Biology, Molecular. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1406948
ISBN:	0493425381

Characterization of a protein that accumulates in Arabidopsis plants after UV-B-exposure.
Marsh, Jennifer Wynne.

Characterization of a protein that accumulates in Arabidopsis plants after UV-B-exposure. - 38 p.

Chair: Rodrigo Lois.

Thesis (M.S.)--California State University, Fullerton, 2002.

Ongoing depletion of atmospheric ozone has led to increased levels of solar UV-B radiation (290–320 nm) that reach the earth's surface affecting all biological systems. Plants are particularly vulnerable to changes in UV-B radiation levels since they need sunlight for photosynthesis. The goal of this research was to increase our understanding of the different mechanisms that makeup defenses against UV-B damage in plants. My approach was to determine if new proteins would accumulate in plants in response to UV-exposure. I found that a new 68-kD protein accumulates upon UV-B radiation of Arabidopsis plants and is restricted to UV irradiated tissues. Appearance of this protein was observed in all ecotypes and mutants of Arabidopsis tested. I present evidence that this protein corresponds to a covalent crosslink between large and small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and that its formation is detectable as early as 2 min after UV-B radiation. These results suggest that accumulation of this crosslinked polypeptide is a direct consequence of UV-damage, which could serve as a good indicator of UV-damage to cellular proteins and may become a useful tool to monitor generalized damage by UV.

ISBN: 0493425381Subjects--Topical Terms:

1017719
Biology, Molecular.

Characterization of a protein that accumulates in Arabidopsis plants after UV-B-exposure.
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500 $a Chair: Rodrigo Lois.
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502 $a Thesis (M.S.)--California State University, Fullerton, 2002.
520 $a Ongoing depletion of atmospheric ozone has led to increased levels of solar UV-B radiation (290–320 nm) that reach the earth's surface affecting all biological systems. Plants are particularly vulnerable to changes in UV-B radiation levels since they need sunlight for photosynthesis. The goal of this research was to increase our understanding of the different mechanisms that makeup defenses against UV-B damage in plants. My approach was to determine if new proteins would accumulate in plants in response to UV-exposure. I found that a new 68-kD protein accumulates upon UV-B radiation of Arabidopsis plants and is restricted to UV irradiated tissues. Appearance of this protein was observed in all ecotypes and mutants of Arabidopsis tested. I present evidence that this protein corresponds to a covalent crosslink between large and small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and that its formation is detectable as early as 2 min after UV-B radiation. These results suggest that accumulation of this crosslinked polypeptide is a direct consequence of UV-damage, which could serve as a good indicator of UV-damage to cellular proteins and may become a useful tool to monitor generalized damage by UV.
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