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Lysyl oxidase-like protein secreted from an acidophilic red alga, Cyanidium caldarium.

ABSTRACT: Cyanidium caldarium is a primitive acidophilic red alga which grown optimally at pH 1-3. When the alga was cultured at pH 6, which is the upper limit of acidity for its survival, most of the algal cells became large cells with four endospores which did not split into daughter cells. This suggests that the alga survives in the endospore state at pH 6 to protect against nutrient uptake deficiency due to low pH gradient across the cell membranes. The alga was also found to secrete an extracellular protein specifically at pH 6. The protein was identified to be lysyl oxidase-like protein, which had been reported to be widely distributed in the animal kingdom but not yet found in the plant kingdom. In the plant kingdom, only two primitive acidophilic algae, C. caldarium and Cyanidioschyzon merolae, possess a gene encoding this protein.

SUBMITTER: Tomo T

PROVIDER: S-EPMC6508830 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Lysyl oxidase-like protein secreted from an acidophilic red alga, <i>Cyanidium caldarium</i>.

Tomo Tatsuya T Okumura Akinori A Suzuki Takehiro T Okuhara Mirai M Katayama Ruriko R Isayama Noboru N Nagao Ryo R Iwai Masako M Dohmae Naoshi N Enami Isao I

Plant direct 20181008 10

<i>Cyanidium caldarium</i> is a primitive acidophilic red alga which grown optimally at pH 1-3. When the alga was cultured at pH 6, which is the upper limit of acidity for its survival, most of the algal cells became large cells with four endospores which did not split into daughter cells. This suggests that the alga survives in the endospore state at pH 6 to protect against nutrient uptake deficiency due to low pH gradient across the cell membranes. The alga was also found to secrete an extrace ...[more]

PMID: 31245685

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