Hydroxyproline-containing and glycine-rich cell wall polypeptides are widespread in the green algae

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Abstract

The cell walls of theVolvocalesstudied so far exclusively consist of hydroxyproline-rich glycoproteins, whereas the cell walls of some strains ofChlorella ellipsoideahave been reported to lack hydroxyproline-containing polypeptides. Therefore, we have compared the amino acid compositions of the cells walls of several green algae with special emphasis on the proportions of hydroxyproline. More or less pronounced levels of hydroxyproline were detected in the cell wall preparations of 15 species belonging to theVolvocales, Chlorococcales, Codiolales, DesmidialesandZygnematales, respectively. Although the hydroxyproline-contents of the cell wall preparations are affected by growth conditions, there is a relationship between the proportions of hydroxyproline present in cell wall polypeptides and the phylogeny of the green algae. Different species belonging to the same genus contained essentially the same proportions of hydroxyproline in their cell walls. The lowest levels of hydroxyproline were found in the cell walls ofScenedesmus subspicatusandPediastrum boryanumwhich, likeChlorella, belong to theChlorococcales. On the basis of the amino acid compositions of insoluble cell wall components, the investigated members of theChlorococcalesseem to be only distantly related to theVolvocales, but more closely related to theCodiolales. The investigated members of theMesotaeniaceaewere found to be heterogeneous with respect to their cell wall polypeptides: TheSpirotaeniaspecies were found to be more closely related toMesotaeniaandGonatozygonthan toCylindrocystisandNetrium. The cell wall preparations of all the investigated green algae contained, in addition to hydroxyproline, remarkably high levels of glycine and alanine. © 1994, Gustav Fischer Verlag Jena GmbH. All rights reserved.

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Voigt, J., Wrann, D., Vogeler, H. P., König, W. A., & Mix, M. (1994). Hydroxyproline-containing and glycine-rich cell wall polypeptides are widespread in the green algae. Microbiological Research, 149(3), 223–229. https://doi.org/10.1016/S0944-5013(11)80062-5

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