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. 2022 Mar 12;11(3):344. doi: 10.3390/pathogens11030344

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Schematic representation of a tandem repeat sequence found in ROM4.5 proteins of diverse Babesia bovis geographical isolates. (A) Scheme of whole length B. bovis ROM4.5 of the reference sequenced strain T2Bo from the USA, showing the positions and number of repeats. (B) Secondary structure of ROM4.5 of B. bovis T2Bo, showing the region that was sequenced in geographic isolates of diverse origin. (C) Schemes of amino acid sequences of the hydrophilic extracellular regions of ROM4.5 alleles from geographical isolates of B. bovis, indicating the positions and number of repeats. Green: 100% conservation among isolates; light brown boxes: perfect 29 aa tandem repeats present in different copy numbers in isolates from North America (T2Bo, Mo7), Brazil (B4), South Africa (SA2) and Argentina (R1A, M2P, and S2P); dark brown boxes: imperfect 29 aa tandem repeats found in different copy numbers in isolates from Australia (A1 and A15) and Israel (I3). Smaller boxes with a ½ sign correspond to truncated repeats.