wE ARE RECRUITING
We are looking for postdocs for two exciting new projects that we will start at late 2018/early 2019 in our lab:
Two postdoc positions funded up to 3 years are available in the Moran lab at the Department of Ecology, Evolution and Behavior at the Hebrew University of Jerusalem, Israel (HUJI). The first project will focus on the evolution of animal venom and toxins and will touch subjects and themes such as neofunctionalization and protein moonlighting. The second project will focus on the evolution of a family of understudied ion channels that carry pivotal physiological roles in different animals but show remarkable diversity in their function, gating properties and conductance, raising the question what was their original function and what evolutionary trajectory led to this diversity. In our lab we use the sea anemone Nematostella vectensis as a model and employ a wide array of biochemical, genetic, microscopic and computational approaches to answer our questions. The fellowships associated with these projects are at the high end of Israeli standards and the successful candidates will also receive additional funds for attending relevant international workshops and conferences on a yearly basis for career development.
The Hebrew University of Jerusalem (HUJI) is one of Israel's premier universities. HUJI has been ranked among the top universities in the world in two comprehensive surveys conducted by The Times Higher Education Supplement of London and Shanghai University. The host lab is located at the Natural Sciences campus at Givat Ram, where a wide range of available technical services and research facilities enable the cutting-edge research in various fields of Life Sciences. Our department is highly international and the working language in the lab is English.
The suitable candidate should have a Ph.D. in life sciences or a related field and experience in standard biochemical and molecular biology techniques. Training in protein biochemistry, molecular evolution, ion channels and/or developmental biology is desirable. Having prior experience in microscopy and/or computational analysis of high throughput sequencing data is an advantage.
More details about our research group can be found throughout the site.
Interested candidates are welcome to contact Yehu (yehu.moran at mail.huji.ac.il).
Please send a CV, list of publications and contact details of 2-3 referees
Feel free to contact Yehu: yehu.moran at mail.huji.ac.il / yehum79 at yahoo.com
Yehu studied from 2001-2010 at Tel Aviv University where he obtained a BSc in Life Sciences, MSc in Biochemistry and PhD working on sea anemone toxins. Then he moved to the lab of Ulrich Technau at the University of Vienna to study the evolution of post-transcriptional regulation by small RNAs. Since January 2014 he is an assistant professor(officially called in the Israeli academic system "senior lecturer") at the Department of Ecology, Evolution and Behavior of the Hebrew University of Jerusalem.
I am an experimental biologist. I find the interface between bioinformatics, genomics and experimental biology very exciting but I'm not a CS person. I was trained in a wide range of biochemical techniques as my master degree is in biochemistry. In my PhD my topics of research switched more intoevolution and in my postdoc I also added developmental biology into the mix. I believe cnidarians are a wonderful research system if you want to get a perspective about what animal life looked like 600 million years ago since this is when they diverged from the rest of the animals. Despite being considered "primitive" they share with us humans sophisticated cell types, including neurons and muscles. The interesting topics you can study with this system are endless. However, time is limited and we focus on the following topics:
The evolution of small RNA pathways and the roles of microRNAs in Cnidaria
MicroRNAs are small RNAs which were discovered initially in nematodes at 1993. A decade later they were also identified in most other animals and in plants and were shown to play crucial roles in the development of many species. MicroRNAs act through a protein effector complex which binds to messenger RNAs in a specific manner via annealing of the microRNA to the mRNA target and affect the target expression levels. I initialized during my postdoc in Vienna a study on the roles of microRNAs in N. vectensis development. This study is still underway but we already obtained some very exciting findings regarding the involvement of microRNAs in the regulation of expression levels of proteins involved in development of the anemone. Moreover, we have interesting results regarding the mechanism of action of microRNAs in cnidarians suggesting new and unexpected links between the microRNA pathways of plants and animals see our papers in MBE and Genome Research about this topic. This project also received much hype (and somewhat disinformative presentation!) in popular media such as here, here (in English) and here (in Hebrew). You can also read our new review in Nature Ecology and Evolution here.
Evolution of sea anemone (and other strange animal) toxins
This is a study I initialized as a PhD student in Tel Aviv University at the lab of Prof. Michael Gurevitz and I pursue it further in my postdoc as a side project (toxinology is a very sad addiction). We published several papers about the unusual evolutionary patterns we discovered in sea anemone and scorpion toxins and speculated regarding the factors driving their selection. In general, animal toxins just like immunology-related proteins are a vast playground for strong adaptive selection as they are involved in a never-ending "arms-race" of prey and predator. We also found evidence for an unusual mode of evolution, called "concerted evolution" in the toxin genes of sea anemones. Further, in a recent paper we also show that the expression of neurotoxins happens in several anemone species such as Nematostella not only in nematocytes (stinging cells) but in gland cells. This finding challenges the common statement presented in many invertebrate zoology textbooks that peptide cnidarian toxins are produced exclusively in nematocytes. The ecological shifts which led to toxin expression in different cell populations of closely-related species are of great interest and open the field to eco-evo studies. We also employed proteomic methods for the study of the venom components of Nematosella nematocytes and recently published those results.
We are nowadays taking advantage on unique tools such as transgenesis techniques that are available in Nematostella for answering questions about the evolution of venom and venom-producing cells.
Evolution of voltage-gated sodium channels
Voltage-gated sodium channels are pivotal components in the conductance of neuronal signals. The unprecedented extent of sequencing of animal genomes in the last few years has enabled us to study in detail the evolution of these channels. We found that these channels have first appeared in unicellular organisms before the split of fungi and animals, but were independently lost in many lineages. Surprisingly cnidarians have a remarkable diversity of channel isoforms, but most of them cannot discern sodium from calcium and potassium. However, Cnidarians do have a selective channel isoform that evolved more than 540 million years ago in the ancestor of all extant cnidarians. The molecular basis of this selectivity is different from that found in selective sodium channels of bilaterians, indicating that sodium selectivity evolved twice independently in animals, probably in order to comply with the rising need for more complex and faster neuronal transmission. In this work we applied both electrophysiological and phylogenetic methods and a first publication came out in Cell Reports. It was followed by a review paper.
Our research is generously funded by the Binational Science Foundation (BSF), the European Research Council (ERC), German-Israeli Foundation for Scientific Research and Development (GIF), the Israel Council of Higher Learning, the Israel Science Foundation (ISF) and the Marie Curie Actions of the European Commission. We are grateful for this support.
26. Modepalli V*, Fridrich A*, Agron M*, Moran Y (2018) The methyltransferase HEN1 is required in Nematostella vectensis for microRNA and piRNA stability as well as larval metamorphosis. PLOS Genet. 14: e1007590. *equal contribution. pubmed link
25. Dnyansagar R, Zimmermann B, Moran Y, Praher D, Sundberg P, Møller LF, Technau U (2018) Dispersal and speciation: The cross Atlantic relationship of two parasitic cnidarians. Mol. Phylogenet. Evol. 126: 346-355. pubmed link
24. Columbus-Shenkar YY*, Sachkova MY*, Macrander J, Fridrich A, Modepalli V, Reitzel AM, Sunagar K, Moran Y (2018) Dynamics of venom composition across a complex life cycle. eLife 7: e35014. *equal contribution. pubmed link
23. Praher D, Zimmermann B, Genikhovich G, Columbus-Shenkar Y, Modepalli V, Aharoni R, Moran Y, Technau U (2017) Characterization of the piRNA pathway during development of the sea anemone Nematostella vectensis. RNA Biol. 14: 1727-1741. pubmed link
22. Modepalli V, Moran Y (2017) Evolution of miRNA Tailing by 3' Terminal Uridylyl Transferases in Metazoa. Genome Biol. Evol. 9: 1547-1560. pubmed link
21. Mauri M, Kirchner M, Aharoni R, Ciolli Mattioli C, van den Bruck D, Gutkovitch N, Modepalli V, Selbach M, Moran Y, Chekulaeva M (2017) Conservation of miRNA-mediated silencing mechanisms across 600 million years of animal evolution. Nucleic Acids Res. 45: 938-950 pubmed link
20. Sunagar K, Moran Y (2015) The Rise and Fall of an Evolutionary Innovation: Contrasting Strategies of Venom Evolution in Ancient and Young Animals. PLOS Genet. 11: e1005596. Link.
19. Jouiaei M*, Sunagar K*, Gross AF, Scheib H, Alewood PF, Moran Y#, Fry BG# (2015) Evolution of an ancient venom: recognition of a novel family of cnidarian toxins and the common evolutionary origin of sodium and potassium neurotoxins in sea anemone. Mol. Biol. Evol. 32:1598-610. *equal contribution; #co-corresponding authors. pubmed link
18. Moran Y, Zakon HH (2014) The evolution of the four subunits of voltage-gated calcium channels: ancient roots, increasing complexity and multiple losses. Genome Biol. Evol. 6: 2210-7. pubmed link
17. Gur Barzilai M, Kahn R, Regev N, Gordon D, Moran Y, Gurevitz M (2014) The specificity of Av3 sea anemone toxin for arthropods is determined at linker DI/SS2-S6 in the pore module of target sodium channels. Biochem. J. 463: 271-7. pubmed link
16. Moran Y, Fredman D, Praher D, Li XZ, Wee LM, Rentzsch F, Zamore PD, Technau U, Seitz H (2014) Cnidarian microRNAs frequently regulate targets by cleavage. Genome Res. 24: 651-63. pubmed link
15. Moran Y, Praher D, Fredman D, Technau U (2013) The evolution of microRNA pathway protein components in Cnidaria. Mol. Biol. Evol. 30: 2541-52. pubmed link
14. Orts DJ, Moran Y, Cologna CT, Peigneur S, Madio B, Praher D, Quinton L, De Pauw E, Bicudo JE, Tytgat J, de Freitas JC (2013) BcsTx3 is a founder of a novel sea anemone toxin family of potassium channel blockers. FEBS J. 280: 4839-52. pubmed link
13. Nesher N, Shapira E, Sher D, Moran Y, Tsveyer L, Turchetti-Maia AL, Horowitz M, Hochner B, Zlotkin E (2013) AdE-1, a new inotropic Na+ channel toxin from Aiptasia diaphana, is similar to, yet distinct from, known anemone Na+ channel toxins. Biochem. J. 451: 81-90. pubmed link
12. Moran Y, Praher D, Schlesinger A, Ayalon A, Tal Y, Technau U (2013) Analysis of soluble protein contents from the nematocysts of a model sea anemone sheds light on venom evolution. Mar. Biotechnol. (NY). 15: 329-39. pubmed link
11. Gur Barzilai M, Reitzel AM, Kraus JEM, Gordon D, Technau U, Gurevitz M, Moran Y (2012) Convergent evolution of sodium ion selectivity in metazoan neuronal signaling. Cell Rep. 2: 242-248. pubmed link
10. Moran Y*, Fredman D*, Szczesny P, Grynberg M, Technau U (2012) Recurrent horizontal transfer of bacterial toxin genes to eukaryotes. Mol. Biol. Evol. 29: 2223-2230. *equal contribution. pubmed link
9. Moran Y, Genikhovich G, Gordon D, Wienkoop S, Zenkert C, Özbek S, Technau U, Gurevitz M (2012) Neurotoxin localization to ectodermal gland cells uncovers an alternative mechanism of venom delivery in sea anemones. Proc. R. Soc. B 279: 1351-1358. pubmed link
8. Weinberger H*, Moran Y*,Gordon D, Turkov M, Kahn R, Gurevitz M (2010) Positions under positive selection – key for selectivity and potency of scorpion alpha-toxins. Mol. Biol. Evol. 27: 1025-34. *these authors contributed equally to this work. pubmed link
7. Moran Y, Weinberger H, Lazarus N, Gur M, Kahn R, Gordon D, Gurevitz M (2009) Fusion and retrotransposition events in the evolution of sea anemone neurotoxin genes. J. Mol. Evol. 69: 115-24. pubmed link
6. Cohen L*, Moran Y*, Sharon A, Segal D, Gordon D, Gurevitz M (2009) An innate immunity peptide of Drosophila melanogaster, interacts with the fly voltage-gated sodium channel. J. Biol. Chem. 284: 23558-63. *these authors contributed equally to this work. pubmed link
5. Moran Y, Weinberger H, Reitzel AM, Sullivan JC, Kahn R, Gordon D, Finnerty JR, Gurevitz, M (2008) Intron retention as a post-transcriptional regulatory mechanism of neurotoxin expression at early life stages of the starlet anemone Nematostella vectensis. J. Mol. Biol. 380: 437-43. pubmed link
4. Moran Y, Weinberger H, Sullivan JC, Reitzel AM, Finnerty JR, Gurevitz M (2008) Concerted Evolution of sea anemone neurotoxin genes is revealed through analysis of the Nematostella vectensis genome. Mol. Biol. Evol. 25: 737-47. pubmed link
3. Moran Y, Kahn R, Cohen L, Gur M, Karbat I, Gordon D, Gurevitz M (2007) Molecular analysis of the sea anemone toxin Av3 reveals selectivity to insects and demonstrates the heterogeneity of receptor site-3 on voltage-gated Na-channels. Biochem. J. 406: 41-48. pubmed link
2. Moran Y, Gurevitz M (2006) When positive selection of neurotoxin genes is missing: The riddle of the sea anemone Nematostella vectensis. FEBS J. 273: 3886-92. pubmed link
1. Moran Y, Cohen L, Kahn R, Karbat I, Gordon D, Gurevitz M (2006) Mutagenesis of the sea anemone toxin Av2 reveals key amino acid residues important for activity on insect voltage-gated sodium channels. Biochemistry 45: 8864-73. pubmed link
5. Moran Y, Agron M, Praher D, Technau U (2017) The evolutionary Origin of plant and animal microRNAs. Nat. Ecol. Evol. 1: 0027. link
4. Sunagar K, Morgenstern D, Reitzel AM, Moran Y (2015) Ecological venomics: How genomics, transcriptomics and proteomics can shed new light on the ecology and evolution of venom. J. Proteomics S1874-3919: 30131-7. pubmed link
3. Moran Y, Gur Barzilai M, Liebeskind BJ, Zakon HH (2015) Evolution of voltage-gated ion channels at the emergence of Metazoa. J. Exp. Biol. 218: 515-525. pubmed link
2. Qiu X, Brown, KV, Moran Y, Chen D (2010) Sirtuin regulation in calorie restriction. Biochim. Biophys. Acta, 1804: 1576-83. pubmed link
1. Moran Y, Gordon D, Gurevitz M (2009) Sea anemone toxins affecting voltage-gated sodium channels - molecular and evolutionary features. Toxicon, 54: 1089-1101. pubmed link
2. Columbus-Shenkar YY, Sachkova MY, Fridrich A, Modepalli V, Sunagar K, Moran Y (2017) Dynamics of venom composition across a complex life cycle. bioRxiv, 159889. link
1. Sunagar K, Columbus-Shenkar YY, Fridrich A, Gutkovitch N, Aharoni R, Moran Y (2017) Cell type-specific expression profiling sheds light on the development of a peculiar neuron, housing a complex organelle. bioRxiv, 158063. link
Yehu Moran's lab Room 212, Berman building Department of Ecology, Evolution and Behavior
Alexander Silberman Institute of Life Sciences Faculty of Science Edmond J. Safra campus, Givat Ram The Hebrew University of Jerusalem 9190401 Jerusalem Israel
Email: yehu.moran at mail.huji.ac.il OR firstname.lastname@example.org
Arie and Yael Maria and the FPLC Yaara and a crocodile
The view of western Jerusalem from our lab window Lab excursion to the Jerusalem zoo