A Highly Divergent Actin Gene in the Nuclear Genome of the Cryptophyte Alga Pyrellolllollns helogolandica
Loading...
Authors
Stibitz, Thomas
Issue Date
1998
Type
Thesis
Language
en_US
Keywords
Alternative Title
Abstract
The cryptophytes are a monophyletic group of unicellular algae with plastids
bound by four membranes. One characteristic that all cryptophytes share is a
structure between the second and third membranes called a nucleomorph.
Believed to be the vestigial nucleus of an algal endosymbiont, the nucleomorph
holds many clues to the process of secondary endosymbiosis.
In this paper we examine two actin genes from a cryptophyte alga,
Pyrenomonas helgolandica. While one actin is typical for the cryptophytes, the
other is highly divergent and believed to have originated in the nucleomorph.
We have completed the sequencing of these two genes and examined the
differences between the two. By exploring the fate of a gene with origins in the
nucleomorph, we hope to better understand secondary endosymbiosis, plastid
evolution, and gene transfer. In addition to these issues, we also provide
evidence for previously undescribed introns in the 5' end of the divergent actin.
Description
v, 30 p.
Citation
Publisher
Kalamazoo College
License
U.S. copyright laws protect this material. Commercial use or distribution of this material is not permitted without prior written permission of the copyright holder.