𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Planctomycetes and eukaryotes: A case of analogy not homology

✍ Scribed by James O. McInerney; William F. Martin; Eugene V. Koonin; John F. Allen; Michael Y. Galperin; Nick Lane; John M. Archibald; T. Martin Embley

Book ID
101704957
Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
115 KB
Volume
33
Category
Article
ISSN
0265-9247

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Planctomycetes, Verrucomicrobia and Chlamydia are prokaryotic phyla, sometimes grouped together as the PVC superphylum of eubacteria. Some PVC species possess interesting attributes, in particular, internal membranes that superficially resemble eukaryotic endomembranes. Some biologists now claim that PVC bacteria are nucleus‐bearing prokaryotes and are considered evolutionary intermediates in the transition from prokaryote to eukaryote. PVC prokaryotes do not possess a nucleus and are not intermediates in the prokaryote‐to‐eukaryote transition. Here we summarise the evidence that shows why all of the PVC traits that are currently cited as evidence for aspiring eukaryoticity are either analogous (the result of convergent evolution), not homologous, to eukaryotic traits; or else they are the result of horizontal gene transfers.

📜 SIMILAR VOLUMES

A Direct Synthesis of Nucleoside Analogs
A Direct Synthesis of Nucleoside Analogs Homologated at the 3′- and 5′-Positions
✍ Jürgen Schmidt; Bernd Eschgfäller; Steven A. Benner 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 German ⚖ 238 KB

## Abstract A new route is presented to prepare analogs of nucleosides homologated at the 3′‐ and 5′‐positions. This route, applicable to both the D‐ and L‐enantiomeric forms, is suitable for the preparation of monomeric bis‐homonucleosides needed for the synthesis of oligonucleotide analogs. It be