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אסיף מאגר המחקר החקלאי
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Degradation of unassembled and damaged thylakoid proteins
Year:
2001
Source of publication :
Biochemical Society Transactions
Authors :
Ostersetzer, Oren
;
.
Volume :
29
Co-Authors:
Adam, Z., Institute of Plant Sciences, Hebrew University, Rehovot 76100, Israel
Ostersetzer, O., Institute of Plant Sciences, Hebrew University, Rehovot 76100, Israel
Facilitators :
From page:
427
To page:
430
(
Total pages:
4
)
Abstract:
To study protein degradation in thylakoid membranes we identified, characterized and cloned thylakoid proteases, and then linked them to known proteolytic processes. Several families of chloroplast proteases were identified and characterized to different extents. FtsH, an ATP-dependent metalloprotease that belongs to the AAA-protein family, was found to be integral to the thylakoid membrane, facing the stroma. It is involved in both the degradation of unassembled subunits of membrane complexes, such as the Rieske Fe-S protein of the cytochrome complex, and the degradation of oxidatively damaged proteins such as the D1 protein of the photosystem II (PS II) reaction centre. Plant genomes contain multiple isomers of this protease but the functional significance of this multiplication is not clear yet. A second protease, the serine ATP-independent DegP, was found to be strongly associated with the luminal side of the thylakoid membrane. Although a specific role has not yet assigned for it, its location suggests that it can degrade luminal soluble proteins as well as luminally exposed regions of thylakoid membrane proteins.
Note:
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More details
DOI :
10.1042/BST0290427
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
21204
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
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Scientific Publication
Degradation of unassembled and damaged thylakoid proteins
29
Adam, Z., Institute of Plant Sciences, Hebrew University, Rehovot 76100, Israel
Ostersetzer, O., Institute of Plant Sciences, Hebrew University, Rehovot 76100, Israel
Degradation of unassembled and damaged thylakoid proteins
To study protein degradation in thylakoid membranes we identified, characterized and cloned thylakoid proteases, and then linked them to known proteolytic processes. Several families of chloroplast proteases were identified and characterized to different extents. FtsH, an ATP-dependent metalloprotease that belongs to the AAA-protein family, was found to be integral to the thylakoid membrane, facing the stroma. It is involved in both the degradation of unassembled subunits of membrane complexes, such as the Rieske Fe-S protein of the cytochrome complex, and the degradation of oxidatively damaged proteins such as the D1 protein of the photosystem II (PS II) reaction centre. Plant genomes contain multiple isomers of this protease but the functional significance of this multiplication is not clear yet. A second protease, the serine ATP-independent DegP, was found to be strongly associated with the luminal side of the thylakoid membrane. Although a specific role has not yet assigned for it, its location suggests that it can degrade luminal soluble proteins as well as luminally exposed regions of thylakoid membrane proteins.
Scientific Publication
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