Michael Melkonian

Chlamydial genes shed light on the evolution of photoautotrophic eukaryotes (2008)

Becker, Burkhard, Hoef-Emden, Kerstin, Melkonian, Michael

Abstract Background Chlamydiae are obligate intracellular bacteria of protists, invertebrates and vertebrates, but have not been found to date in photosynthetic eukaryotes (algae and embryophytes)....

The ancestor of the Paulinellachromatophore obtained a carboxysomal operon by horizontal gene transfer from a Nitrococcus-like γ-proteobacterium (2007)

Marin, Birger, Nowack, Eva CM, Glöckner, Gernot, Melkonian, Michael

Abstract Background Paulinella chromatophora is a freshwater filose amoeba with photosynthetic endosymbionts (chromatophores) of cyanobacterial origin that are closely related to free-living...

EST analysis of the scaly green flagellate Mesostigma viride(Streptophyta): Implications for the evolution of green plants (Viridiplantae) (2006)

Simon, Andreas, Glöckner, Gernot, Felder, Marius, Melkonian, Michael, Becker, Burkhard

Abstract Background The Viridiplantae (land plants and green algae) consist of two monophyletic lineages, the Chlorophyta and the Streptophyta. The Streptophyta include all embryophytes and a small...

Lineage-specific variations of congruent evolution among DNA sequences from three genomes, and relaxed selective constraints on rbcL in Cryptomonas(Cryptophyceae) (2005)

Hoef-Emden, Kerstin, Tran, Hoang-Dung, Melkonian, Michael

Abstract Background Plastid-bearing cryptophytes like Cryptomonas contain four genomes in a cell, the nucleus, the nucleomorph, the plastid genome and the mitochondrial genome. Comparative...

Stromal Free Calcium Concentration and Light-Mediated Activation of Chloroplast Fructose-1,6-Bisphosphatase 1

Kreimer, Georg, Melkonian, Michael, Holtum, Joseph A. M., Latzko, Erwin

Light-mediated activation of fructose-1,6-bisphosphatase (EC 3.1.3.11) in intact spinach chloroplasts (Spinacia oleracea L.) is enhanced in the presence of 10−5 molar external free Ca2+. The most...

Identification and Characterization of Glycolate Oxidase and Related Enzymes from the Endocyanotic Alga Cyanophora paradoxa and from Pea Leaves 1

Betsche, Thomas, Schaller, Dietmar, Melkonian, Michael

Glycolate oxidase (GO) has been identified in the endocyanom Cyanophora paradoxa which has peroxisome-like organelles and cyanelles instead of chloroplasts. The enzyme used or formed equimolar...

Centrin Scaffold in Chlamydomonas reinhardtii Revealed by Immunoelectron Microscopy

Geimer, Stefan, Melkonian, Michael

In the flagellate green alga Chlamydomonas reinhardtii the Ca2+-binding EF-hand protein centrin is encoded by a single-copy gene. Previous studies have localized the protein to four distinct...

Stromal Free Calcium Concentration and Light-Mediated Activation of Chloroplast Fructose-1,6-Bisphosphatase 1

Kreimer, Georg, Melkonian, Michael, Holtum, Joseph A. M., Latzko, Erwin

Light-mediated activation of fructose-1,6-bisphosphatase (EC 3.1.3.11) in intact spinach chloroplasts (Spinacia oleracea L.) is enhanced in the presence of 10−5 molar external free Ca2+. The most...

Identification and Characterization of Glycolate Oxidase and Related Enzymes from the Endocyanotic Alga Cyanophora paradoxa and from Pea Leaves 1

Betsche, Thomas, Schaller, Dietmar, Melkonian, Michael

Glycolate oxidase (GO) has been identified in the endocyanom Cyanophora paradoxa which has peroxisome-like organelles and cyanelles instead of chloroplasts. The enzyme used or formed equimolar...

Centrin Scaffold in Chlamydomonas reinhardtii Revealed by Immunoelectron Microscopy

Geimer, Stefan, Melkonian, Michael

In the flagellate green alga Chlamydomonas reinhardtii the Ca2+-binding EF-hand protein centrin is encoded by a single-copy gene. Previous studies have localized the protein to four distinct...

A Novel 95-kD Protein Is Located in a Linker between Cytoplasmic Microtubules and Basal Bodies in a Green Flagellate and Forms Striated Filaments In Vitro

Geimer, Stefan, Clees, Judith, Melkonian, Michael, Lechtreck, Karl-Ferdinand

The flagellar basal apparatus comprises the basal bodies and the attached fibrous structures, which together form the organizing center for the cytoskeleton in many flagellated cells. Basal apparatus...