Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA

As the oldest known lineage of oxygen-releasing photosynthetic organisms, cyanobacteria play the key roles in helping shaping the ecology of Earth. Iron is an ideal transition metal for redox reactions in biological systems. Cyanobacteria frequently encounter iron deficiency due to the environmental...

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Autores principales:	Anqi Jia, Yanli Zheng, Hui Chen, Qiang Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	CP43 cyanobacteria iron deficiency IsiA photosynthesis Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/e9394757d16744db8a6da83415e9bbaa
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spelling	oai:doaj.org-article:e9394757d16744db8a6da83415e9bbaa2021-11-17T05:44:31ZRegulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA1664-302X10.3389/fmicb.2021.774107https://doaj.org/article/e9394757d16744db8a6da83415e9bbaa2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmicb.2021.774107/fullhttps://doaj.org/toc/1664-302XAs the oldest known lineage of oxygen-releasing photosynthetic organisms, cyanobacteria play the key roles in helping shaping the ecology of Earth. Iron is an ideal transition metal for redox reactions in biological systems. Cyanobacteria frequently encounter iron deficiency due to the environmental oxidation of ferrous ions to ferric ions, which are highly insoluble at physiological pH. A series of responses, including architectural changes to the photosynthetic membranes, allow cyanobacteria to withstand this condition and maintain photosynthesis. Iron-stress-induced protein A (IsiA) is homologous to the cyanobacterial chlorophyll (Chl)-binding protein, photosystem II core antenna protein CP43. IsiA is the major Chl-containing protein in iron-starved cyanobacteria, binding up to 50% of the Chl in these cells, and this Chl can be released from IsiA for the reconstruction of photosystems during the recovery from iron limitation. The pigment–protein complex (CPVI-4) encoded by isiA was identified and found to be expressed under iron-deficient conditions nearly 30years ago. However, its precise function is unknown, partially due to its complex regulation; isiA expression is induced by various types of stresses and abnormal physiological states besides iron deficiency. Furthermore, IsiA forms a range of complexes that perform different functions. In this article, we describe progress in understanding the regulation and functions of IsiA based on laboratory research using model cyanobacteria.Anqi JiaYanli ZhengHui ChenQiang WangFrontiers Media S.A.articleCP43cyanobacteriairon deficiencyIsiAphotosynthesisMicrobiologyQR1-502ENFrontiers in Microbiology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CP43 cyanobacteria iron deficiency IsiA photosynthesis Microbiology QR1-502
spellingShingle	CP43 cyanobacteria iron deficiency IsiA photosynthesis Microbiology QR1-502 Anqi Jia Yanli Zheng Hui Chen Qiang Wang Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
description	As the oldest known lineage of oxygen-releasing photosynthetic organisms, cyanobacteria play the key roles in helping shaping the ecology of Earth. Iron is an ideal transition metal for redox reactions in biological systems. Cyanobacteria frequently encounter iron deficiency due to the environmental oxidation of ferrous ions to ferric ions, which are highly insoluble at physiological pH. A series of responses, including architectural changes to the photosynthetic membranes, allow cyanobacteria to withstand this condition and maintain photosynthesis. Iron-stress-induced protein A (IsiA) is homologous to the cyanobacterial chlorophyll (Chl)-binding protein, photosystem II core antenna protein CP43. IsiA is the major Chl-containing protein in iron-starved cyanobacteria, binding up to 50% of the Chl in these cells, and this Chl can be released from IsiA for the reconstruction of photosystems during the recovery from iron limitation. The pigment–protein complex (CPVI-4) encoded by isiA was identified and found to be expressed under iron-deficient conditions nearly 30years ago. However, its precise function is unknown, partially due to its complex regulation; isiA expression is induced by various types of stresses and abnormal physiological states besides iron deficiency. Furthermore, IsiA forms a range of complexes that perform different functions. In this article, we describe progress in understanding the regulation and functions of IsiA based on laboratory research using model cyanobacteria.
format	article
author	Anqi Jia Yanli Zheng Hui Chen Qiang Wang
author_facet	Anqi Jia Yanli Zheng Hui Chen Qiang Wang
author_sort	Anqi Jia
title	Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
title_short	Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
title_full	Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
title_fullStr	Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
title_full_unstemmed	Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA
title_sort	regulation and functional complexity of the chlorophyll-binding protein isia
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/e9394757d16744db8a6da83415e9bbaa
work_keys_str_mv	AT anqijia regulationandfunctionalcomplexityofthechlorophyllbindingproteinisia AT yanlizheng regulationandfunctionalcomplexityofthechlorophyllbindingproteinisia AT huichen regulationandfunctionalcomplexityofthechlorophyllbindingproteinisia AT qiangwang regulationandfunctionalcomplexityofthechlorophyllbindingproteinisia
_version_	1718425896398880768

Regulation and Functional Complexity of the Chlorophyll-Binding Protein IsiA

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