Dear All, Centre for Ecological Sciences Indian Institute of Science hosts the "Bangalore Evolution Group Meeting" (http://adaptationlab.wordpress.com/bangalore-evolution-group/)" Title: The evolution of a hybrid membrane trafficking system in a hybrid yeast. Speaker: Ramya Purkanti (Dr. Mukund Thattai's Lab) NCBS, Bangalore Day: 29th Jan 2014, Wednesday Time: 3pm Tea/Coffee: After the talk (around 4:30pm). Venue: CES Seminar Hall, 3rd Floor, Biological Sciences Building. (The 2 pm shuttle leaving from NCBS can drop people at CES) Abstract: "We are interested in the ancient origins of the eukaryotic compartmentalized cell plan. The focus is on understanding the process of organellar diversification in the context of non-endosymbiotic organelles. Since last Eukaryotic Common Ancestor' (LECA) was already a fairly complex organism, the time period we are addressing is post the original eukaryogenesis event (~ 2.5 billion years ago (BYA)) till LECA (~1.8 BYA). Hypothesis proposed by Dacks and Field (2007) suggests that a new organelle can be generated by the gene family expansion of ‘complete set’ of budding and fusion molecules associated with an existing organelle followed by their divergence into specifically interacting subsets.This hypothesis requires a biological process which ensures the concomitant duplication of an entire set of molecules and the elimination of cross-talk across the different sets. Here, we explore the possible role of hybridization in driving organellar diversification through the study of recent hybrid speciation events. In the talk, I will discuss a 500 year old hybridization of ale-beer brewing yeast, S.cerevisiae and S.eubayanus from Patagonia (Argentina) to give rise to the lager beer brewing yeast, S.pastorianus. I shall first present genome-scale patterns of gene gains and losses, divergence etc and then focus specifically onto the vesicular transport system of the hybrid." All are cordially welcome