| Título: | Inverted Topologies in Membrane Proteins: A Mini-Review |
| Autores: |
Duran, Amanda M; Vanderbilt University Meiler, Jens |
| Fecha: | 2013-11-09 |
| Publicador: | Computacional and structural biotechnology journal |
| Fuente: |
 |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
| Tema: | No aplica |
| Descripción: | Helical membrane proteins such as transporters, receptors, or channels often exhibit structural symmetry. Symmetry is perfect in homo-oligomers consisting of two or more copies of the same protein chain. Intriguingly, in single chain membrane proteins, often internal pseudo-symmetry is observed, in particular in transporters and channels. In several cases single chain proteins with pseudo-symmetry exist, that share the fold with homo-oligomers suggesting evolutionary pathways that involve gene duplication and fusion. It has been hypothesized that such evolutionary pathways allow for the rapid development of large proteins with novel functionality. At the same time symmetry can be leveraged to recognize highly symmetric substrates such as ions. Here we review helical transporter proteins with an inverted two-fold pseudo-symmetry. In this special scenario the symmetry axis lies in the membrane plane. As a result, the putative ancestral monomeric protein would insert in both directions into the membrane and its open-to-the-inside and open-to-the-outside conformations would be structurally identical and iso-energetic, giving a possible evolutionary pathway to create a transporter protein that needs to flip between the two states. |
| Idioma: | Inglés |
1 Systems biology and metabolic engineering of Arthrospira cell factories por Klanchui, Amornpan,Vorapreeda, Tayvich,Vongsangnak, Wanwipa,Kannapho, Chiraphan,Cheevadhanarak, Supapon,Meechai, Asawin | 6 The Role of INDY in Metabolic Regulation por Willmes, Diana M; Charité University School of Medicine Berlin,Birkenfeld, Andreas L; Charité University School of Medicine Berlin |
2 Structure-based Methods for Computational Protein Functional Site Prediction por KC, Dukka B; North Carolina A&T State University | 7 The Biochemistry of Vitreoscilla hemoglobin por Stark, Benjamin C.; Illinois Institute of Technology,Dikshit, Kanak L.; Institute of Microbial Technology,Pagilla, Krishna R.; Illinois Institute of Technology |
3 Computer-Aided Protein Directed Evolution: a Review of Web Servers, Databases and other Computational Tools for Protein Engineering por Verma, Rajni; Jacobs University Bremen,Schwaneberg, Ulrich; RWTH Aachen University,Roccatano, Danilo; Jacobs University Bremen | 8 A method to predict edge strands in beta-sheets from protein sequences por Guilloux, Antonin,Caudron, Bernard,Jestin, Jean-Luc |
4 MD simulation studies to investigate iso-energetic conformational behaviour of modified nucleosides m2G and m22G present in tRNA por Bavi, Rohit S,Sambhare, Susmit B,Sonawane, Kailas D; Structural Bioinformatics Unit,
Department of Biochemistry,
Shivaji University, Kolhapur 416 004,
Maharashtra (M.S.), India. | 9 Conformational Sampling in Template-Free Protein Loop Structure Modeling: An Overview por Li, Yaohang; Old Dominion University |
5 Metabolomics in the identification of biomarkers of dietary intake por O’Gorman, Aoife,Gibbons, Helena,Brennan, Lorraine | 10 Development of microorganisms for cellulose-biofuel consolidated bioprocessings: metabolic engineers’ tricks por Mazzoli, Roberto; University of Torino, Italy. |