Babesia bovis: a comprehensive phylogenetic analysis of plastid-encoded genes supports green algal origin of apicoplasts

Audrey O T Lau; Terry F McElwain; Kelly A Brayton; Donald P Knowles; Eric H Roalson

doi:10.1016/j.exppara.2009.07.007

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Babesia bovis: a comprehensive phylogenetic analysis of plastid-encoded genes supports green algal origin of apicoplasts

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Babesia bovis: a comprehensive phylogenetic analysis of plastid-encoded genes supports green algal origin of apicoplasts

Audrey O T Lau, Terry F McElwain, Kelly A Brayton, Donald P Knowles and Eric H Roalson

Experimental parasitology, Vol.123(3), pp.236-243

11/2009

DOI: https://doi.org/10.1016/j.exppara.2009.07.007

Handle:

https://hdl.handle.net/2376/104901

PMID: 19646439

Abstract

Cyanobacteria - genetics

Amino Acid Sequence

Cyanobacteria - classification

Apicomplexa - ultrastructure

Apicomplexa - classification

Phylogeny

Euglenida - classification

Apicomplexa - genetics

Chlorophyta - genetics

Likelihood Functions

Sequence Alignment

Animals

Eukaryotic Cells - classification

Bayes Theorem

Plastids - genetics

Babesia bovis - ultrastructure

Babesia bovis - genetics

Plastids - classification

Euglenida - genetics

Chlorophyta - classification

Babesia bovis - classification

Chlorophyta - ultrastructure

Apicomplexan parasites commonly contain a unique, non-photosynthetic plastid-like organelle termed the apicoplast. Previous analyses of other plastid-containing organisms suggest that apicoplasts were derived from a red algal ancestor. In this report, we present an extensive phylogenetic study of apicoplast origins using multiple previously reported apicoplast sequences as well as several sequences recently reported. Phylogenetic analysis of amino acid sequences was used to determine the evolutionary origin of the organelle. A total of nine plastid genes from 37 species were incorporated in our study. The data strongly support a green algal origin for apicoplasts and Euglenozoan plastids. Further, the nearest green algae lineage to the Apicomplexans is the parasite Helicosporidium, suggesting that apicoplasts may have originated by lateral transfer from green algal parasite lineages. The results also substantiate earlier findings that plastids found in Heterokonts such as Odontella and Thalassiosira were derived from a separate secondary endosymbiotic event likely originating from a red algal lineage.

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Title: Babesia bovis: a comprehensive phylogenetic analysis of plastid-encoded genes supports green algal origin of apicoplasts
Creators: Audrey O T Lau - Program in Genomics, Department of Veterinary Microbiology & Pathology, School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040, USA. laua@vetmed.wsu.edu
Terry F McElwain
Kelly A Brayton
Donald P Knowles
Eric H Roalson
Publication Details: Experimental parasitology, Vol.123(3), pp.236-243
Academic Unit: Veterinary Microbiology and Pathology, Department of; Paul G. Allen School for Global Animal Health; Biological Sciences, School of
Publisher: United States
Identifiers: 99900546948601842
Language: English
Resource Type: Journal article

Babesia bovis: a comprehensive phylogenetic analysis of plastid-encoded genes supports green algal origin of apicoplasts

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