Biofilm formation initiating rotifer-specific biopolymer and its predicted components

Datki, Zsolt László and Darula, Zsuzsanna and Vedelek, Viktor and Hunyadi-Gulyás Éva, Csilla and Dingmann, Brian J. and Vedelek, Balazs and Kalman, Janos and Urban, Peter and Gyenesei, Attila and Galik-Olah, Zita and Gálik, Bence and Sinka, Rita (2023) Biofilm formation initiating rotifer-specific biopolymer and its predicted components. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 253 (Part 5). No-127157. ISSN 0141-8130

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Abstract

The rotifer-specific biopolymer, namely Rotimer, is a recently discovered group of the biomolecule family. Rotimer has an active role in the biofilm formation initiated by rotifers (e.g., Euchlanis dilatata or Adineta vaga) or in the female-male sexual interaction of monogononts. To understand the Ca2+- and polarity-dependent formation of this multifunctional viscoelastic material, it is essential to explore its molecular composition. The investigation of the rotifer-enhanced biofilm and Rotimer-inductor conglomerate (RIC) formation yielded several protein candidates to predict the Rotimer-specific main components. The exudate of E. dilatata males was primarily applied from different biopolimer-containing samples (biofilm or RIC). The advantage of males over females lies in their degenerated digestive system and simple anatomy. Thus, their exudate is less contaminated with food and endosymbiont elements. The sequenced and annotated genome and transcriptome of this species opened the way for identifying Rotimer proteins by mass spectrometry. The predicted rotifer-biopolymer forming components are SCO-spondins and 14-3-3 protein. The characteristics of Rotimer are similar to Reissner's fiber, which is found in the central nervous system of vertebrates and is mainly formed from SCO-spondins. This molecular information serves as a starting point for its interdisciplinary investigation and application in biotechnology, biomedicine, or neurodegeneration-related drug development.

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